1. A hotel water footprint optimization method performed by an electronic device, comprising:

obtaining a hotel water footprint optimization task;

executing the hotel water footprint optimization task to obtain investment budget cost for the hotel water footprint reduction and transformation;

inputting the investment budget cost into an investment budget cost function so as to output a plurality of candidate equipment purchasing schemes; wherein each candidate device procurement scheme comprises the type of candidate device to be procured, the unit price of each candidate device, the quantity of procurement of each candidate device and the year of procurement of each candidate device;

determining a water trace amount corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

determining an investment return period corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

and determining a target scheme corresponding to the investment budget cost from the plurality of candidate equipment purchasing schemes according to the water footprint quantity and the return on investment period corresponding to the plurality of candidate equipment purchasing schemes.

2. The hotel water footprint optimization method performed by an electronic device of claim 1,

the investment budget cost function f₁(x) The method comprises the following steps:

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

j represents the year of water footprint reduction modification, and J belongs to J;

x_i，jthe unit of the number of the ith equipment purchased and installed in the j year is expressed;

c_irepresents the price of the ith device in units of elements.

3. The hotel water footprint optimization method performed by an electronic device of claim 2,

the investment budget cost function f₁(x) The constraints in the candidate equipment procurement plan include:

wherein Z is_iRepresents the maximum number of devices of the ith class in units of units.

4. The hotel water footprint optimization method performed by an electronic device of claim 2,

the investment budget cost function f₁(x) The constraints in the candidate device procurement arrangements of (1) include: the purchase quantity of the candidate equipment is a natural number.

5. The hotel water footprint optimization method performed by an electronic device of claim 1, said determining a water footprint amount for each of said candidate device procurement solutions according to each of said candidate device procurement solutions, comprising:

and determining the water footmark amount corresponding to each candidate equipment purchasing scheme according to a water footmark function.

6. The hotel water footprint optimization method performed by the electronic device of claim 5, the water footprint function comprising a direct water footprint function and an indirect water footprint function.

7. The hotel water footprint optimization method performed by an electronic device of claim 6,

the direct water foot-trace function WF_{Direct connection}The method comprises the following steps:

the indirect water foot-trace function WF_{Indirect connection}The method comprises the following steps:

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

x_irepresenting the number of purchases of the ith type of equipment in units of units;

ws_ithe annual water saving quantity of the ith equipment purchased in the hotel is expressed in cubic meters;

k represents a water footprint coefficient of the electrical energy, namely a water footprint generated every one degree of electricity consumed, and the unit is cubic meter per kilowatt-hour;

we_ithe annual energy saving of the ith equipment purchased by the hotel is represented in kilowatt-hour.

8. The hotel water footprint optimization method performed by an electronic device of claim 1, said determining a return on investment period for each of said candidate equipment procurement plans according to each of said candidate equipment procurement plans, comprising:

determining a return on investment period corresponding to each candidate equipment purchasing scheme according to a return on investment period function f₃(x) The method comprises the following steps:

f₃(x)＝DPP＝M+|CDCF^M|/DCF^M+1 (5)

DCF_j＝CF_j/(1+d)^j (6)

CDCF_j＝CDCF_j-1+DCF_j (7)

CF_j＝CF2_j-CF1_j (8)

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

j represents the year of water footprint reduction modification, and J belongs to J;

m represents the last year of negative net cash amount after the water footprint reduction transformation is implemented;

CDCF^Mrepresents the value of CDCF at the end of year M in units of elements;

DCF^M+1represents the value of DCF at the end of year M +1 in units of elements;

CF1_jthe unit of the cash expenditure in the j year is element, and j is less than or equal to M;

CF2_jrepresenting the cash income of the jth year, wherein the unit is Yuan, and j is less than or equal to M;

d represents the annual inflation rate;

DCF_jrepresenting the net cash amount of the ith year in Yuan;

CDCF_jrepresents the cumulative cash-out amount in the j-th year in Yuan.

9. The hotel water footprint optimization method performed by an electronic device of any one of claims 1-8, said determining a target solution corresponding to the investment budget cost from a plurality of candidate equipment procurement solutions according to the plurality of candidate equipment procurement solutions corresponding to the water footprint quantity and the return on investment period, comprising:

determining a target solution corresponding to the investment budget cost from a plurality of the candidate equipment procurement solutions according to a target function, wherein the target function f (x) comprises:

f(x)＝f₁(x)+f₂(x)+f₃(x)

wherein the content of the first and second substances,

f₁(x) Representing the investment budget cost of the water footprint reduction and transformation of the hotel in Yuan；

f₂(x) The unit of the water footprint reduced every year after the hotel water footprint reduction and transformation is finished is cubic meter/year;

f₃(x) Representing the return on investment period in the hotel water footprint reduction and transformation process, wherein the unit is year;

and the candidate equipment purchasing scheme corresponding to the maximum value of the objective function is used as an objective scheme.

10. The hotel water footprint optimization method performed by an electronic device of claim 9,

the objective function calculation formula further includes a normalization formula for f₁(x)、f₂(x) And f₃(x) And (6) carrying out normalization processing.

Background

Water resources are important basic natural resources in human society, and the position of the water resources in the development of the economic society is important. The problems of water resources are increasing, and the regulation of the supply and use forms of the water resources is pressing day by day.

The water footprint (water fountain) refers to invisible water consumed by the public in daily life in the process of consuming products and services, and the water consumed by the products or services in the production process is the water footprint of the products or services.

For industries such as hotels with large water consumption, the use of water resources has great influence on the operating cost of enterprises, and water footprint reduction and transformation are needed. However, the existing water footprint reduction transformation scheme is generally established manually, which not only consumes manpower, but also is not ideal.

Disclosure of Invention

Technical problem to be solved

In view of the above technical problems, the present disclosure provides a hotel water footprint optimization method performed by an electronic device, in order to at least partially solve one of the above technical problems.

(II) technical scheme

In order to solve the above technical problem, the present disclosure provides a hotel water footprint optimization method performed by an electronic device, including:

obtaining a hotel water footprint optimization task;

executing the hotel water footprint optimization task to obtain investment budget cost for the hotel water footprint reduction and transformation;

inputting the investment budget cost into an investment budget cost function so as to output a plurality of candidate equipment purchasing schemes; wherein each candidate device procurement scheme comprises the type of candidate device to be procured, the unit price of each candidate device, the quantity of procurement of each candidate device and the year of procurement of each candidate device;

determining a water trace amount corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

determining an investment return period corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

and determining a target scheme corresponding to the investment budget cost from the plurality of candidate equipment purchasing schemes according to the water footprint quantity and the return on investment period corresponding to the plurality of candidate equipment purchasing schemes.

According to an embodiment of the present disclosure, the investment budget cost function f₁(x) The method comprises the following steps:

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

j represents the year of water footprint reduction modification, and J belongs to J;

x_i，jthe unit of the number of the ith equipment purchased and installed in the j year is expressed;

c_irepresents the price of the ith device in units of elements.

According to an embodiment of the present disclosure, the investment budget cost function f₁(x) The constraints in the candidate equipment procurement plan include:

wherein Z is_iRepresents the maximum number of devices of the ith class in units of units.

According to an embodiment of the present disclosure, the investment budget cost function f₁(x) The constraints in the candidate equipment procurement plan include: the purchase quantity of the candidate equipment is a natural number.

According to an embodiment of the present disclosure, determining a water track amount corresponding to each candidate device procurement scheme according to each candidate device procurement scheme includes:

and determining the water footmark amount corresponding to each candidate equipment purchasing scheme according to a water footmark function.

According to an embodiment of the present disclosure, the water footprint function includes a direct water footprint function and an indirect water footprint function.

According to an embodiment of the present disclosure, the direct water footmark function WF_{Direct connection}The method comprises the following steps:

the indirect water foot-trace function WF_{Indirect connection}The method comprises the following steps:

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

x_irepresenting the number of purchases of the ith type of equipment in units of units;

ws_ithe annual water saving quantity of the ith equipment purchased in the hotel is expressed in cubic meters;

k represents a water footprint coefficient of the electrical energy, namely a water footprint generated every one degree of electricity consumed, and the unit is cubic meter per kilowatt-hour;

we_ithe annual energy saving of the ith equipment purchased by the hotel is represented in kilowatt-hour.

According to an embodiment of the present disclosure, the determining, according to each candidate device procurement scenario, a return on investment period corresponding to each candidate device procurement scenario includes: determining a return on investment period corresponding to each candidate equipment purchasing scheme according to a return on investment period function f₃(x) The method comprises the following steps:

f₃(x)＝DPP＝M+|CDCF^M|/DCF^M+1 (5)

DCF_j＝CF_j/(1+d)^j (6)

CDCF_j＝CDCF_j-1+DCF_j (7)

CF_j＝CF2_j-CF1_j (8)

wherein the content of the first and second substances,

i represents the type of the equipment, I belongs to I;

j represents the year of water footprint reduction modification, and J belongs to J;

m represents the last year of negative net cash amount after the water footprint reduction transformation is implemented;

CDCF^Mrepresents the value of CDCF at the end of year M in units of elements;

DCF^M+1represents the value of DCF at the end of year M +1 in units of elements;

CF1_jthe unit of the cash expenditure in the j year is element, and j is less than or equal to M;

CF2_jrepresenting the cash income of the jth year, wherein the unit is Yuan, and j is less than or equal to M;

d represents the annual inflation rate;

DCF_jrepresenting the net cash amount of the j year in units of yuan;

CDCF_jrepresents the cumulative cash-out amount in the j-th year in Yuan.

According to an embodiment of the present disclosure, the determining a target plan corresponding to the investment budget cost from a plurality of candidate equipment procurement plans according to the water footprint and the return on investment period corresponding to the plurality of candidate equipment procurement plans includes:

determining a target solution corresponding to the investment budget cost from a plurality of the candidate equipment procurement solutions according to a target function, wherein the target function f (x) comprises:

f(x)＝f₁(x)+f₂(x)+f₃(x)

wherein the content of the first and second substances,

f₁(x) Representing the investment budget cost of the hotel water footprint reduction transformation, wherein the unit is Yuan;

f₂(x) The unit of the water footprint reduced every year after the hotel water footprint reduction and transformation is finished is cubic meter/year;

f₃(x) Representing the return on investment period in the hotel water footprint reduction and transformation process, wherein the unit is year;

and the candidate equipment purchasing scheme corresponding to the maximum value of the objective function is used as an objective scheme.

According to an embodiment of the present disclosure, the objective function calculation formula further includes a normalization formula, the normalization formula is used for f₁(x)f₂(x) And f₃(x) And (6) carrying out normalization processing.

(III) advantageous effects

The hotel water footprint optimization method provided by the disclosure comprises the steps of executing a hotel water footprint optimization task by adopting electronic equipment, inputting investment budget cost into an investment budget cost function to obtain a plurality of candidate equipment purchasing schemes, then determining a water footprint amount and an investment return period corresponding to each candidate equipment purchasing scheme, and then determining a target scheme corresponding to the investment budget cost according to the water footprint amount and the investment return period corresponding to each candidate equipment purchasing scheme to obtain an equipment purchasing scheme during hotel water footprint reduction and transformation. By adopting the hotel water footprint optimization method provided by the disclosure, automation of establishment of a hotel water footprint reduction transformation scheme is realized, manpower is saved, computing power of electronic equipment is fully utilized, optimization efficiency is improved, and resources are saved.

Drawings

Fig. 1 is a flowchart of the hotel water footprint optimization method of the present embodiment.

Detailed Description

For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

The symbols and meanings of the parameters in the following examples are as follows:

I. j respectively represents an equipment set and a water footprint reduction and transformation implementation year set, and the specific parameter symbols and meanings are as follows:

i represents the type of the equipment, I belongs to I;

j represents the year of water footprint reduction modification, and J belongs to J;

x_irepresenting the purchase quantity of the ith equipment in units of units;

x_i，jthe unit of the number of purchased and installed facilities of the ith type in the jth year is expressed;

c_irepresents the price of the ith device in units of elements;

we_ithe annual electricity saving quantity of the ith equipment purchased by the hotel is represented in kilowatt-hour;

ws_ithe annual water saving quantity of the ith equipment purchased in the hotel is expressed in cubic meters;

k represents a water footprint coefficient of the electrical energy, namely a water footprint generated every one degree of electricity consumed, and the unit is cubic meter per kilowatt-hour;

m represents the last year of the last year in which the net cash amount is negative after the project is implemented;

CDCF^Mrepresents the value of CDCF at the end of year M in units of elements;

DCF^M+1represents the value of DCF at the end of year M +1 in units of elements;

CF1_jrepresents the cash expenditure of the j year in units of yuan;

CF2_jrepresenting the cash income of the j year in units of yuan;

d represents the annual inflation rate;

DCF_jrepresenting the net cash amount of the j year in units of yuan;

CDCF_jexpressing the accumulated cash-in-cash amount of the jth year, wherein the unit is Yuan;

f₁(x) Representing the investment budget cost of the hotel water footprint reduction transformation, wherein the unit is Yuan;

f₂(x) The unit of the water footprint reduced every year after the hotel water footprint reduction and transformation is finished is cubic meter/year;

f₃(x) Representing the return on investment period in the hotel water footprint reduction and transformation process, wherein the unit is year;

Z_irepresents the maximum number of devices of the ith class in units of units.

The hotel water footprint optimization problem disclosed by the invention is particularly characterized in that when hotel managers purchase various water-saving and energy-saving devices capable of reducing hotel service water footprints, the optimal purchase scheme is selected for the hotel managers. In the problem, if too much water-saving equipment is purchased, the cost of the hotel is too high, and if the purchased water-saving and energy-saving equipment has too poor performance, the initial purpose of saving water footprint is difficult to meet; if the cost of the purchased equipment is too high, the investment return period is too long, and the investment risk is increased. Therefore, when hotel managers carry out hotel water footprint reduction transformation, the investment budget cost is reduced as much as possible, the investment return period is shortened, and the hotel water footprint is reduced. Namely, the hotel is expected to be subjected to water footprint reduction transformation with the minimum investment budget cost and the shortest return on investment period, and the water footprint of the hotel is reduced as much as possible so as to meet the relevant water footprint standard.

To solve the above technical problem, an embodiment of the present disclosure provides a hotel water footprint optimization method executed by an electronic device, including:

obtaining a hotel water footprint optimization task;

executing a hotel water footprint optimization task to obtain investment budget cost for the reduction and reconstruction of the hotel water footprint;

inputting the investment budget cost into an investment budget cost function so as to output a plurality of candidate equipment purchasing schemes; wherein each candidate device purchasing scheme comprises the types of candidate devices to be purchased, the unit price of each candidate device, the purchasing quantity of each candidate device and the purchasing years of each candidate device;

determining a water trace amount corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

determining an investment return period corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme;

and determining a target scheme corresponding to the investment budget cost from the plurality of candidate equipment purchasing schemes according to the water footprint quantities and the return on investment periods corresponding to the plurality of candidate equipment purchasing schemes.

The hotel water footprint optimization method provided by the disclosure comprises the steps of executing a hotel water footprint optimization task by adopting electronic equipment, inputting investment budget cost into an investment budget cost function to obtain a plurality of candidate equipment purchasing schemes, then determining a water footprint amount and an investment return period corresponding to each candidate equipment purchasing scheme, then determining a target scheme corresponding to the investment budget cost according to the water footprint amount and the investment return period corresponding to each candidate equipment purchasing scheme, and further obtaining an equipment purchasing scheme during hotel water footprint reduction and transformation. By adopting the hotel water footprint optimization method provided by the disclosure, automation of establishment of a hotel water footprint reduction transformation scheme is realized, manpower is saved, computing power of electronic equipment is fully utilized, optimization efficiency is improved, and resources are saved.

Fig. 1 schematically shows a flow chart of a method of optimizing a hotel water footprint according to the present embodiment.

As shown in fig. 1, the optimization method of hotel water footprint performed by an electronic device includes operations S101 to S106.

In operation S101, a hotel water footprint optimization task is acquired.

According to embodiments of the present disclosure, for example, a hotel water footprint optimization task entered by a user on an electronic device may be obtained. The electronic device may respond to the hotel water footprint optimization task and execute the hotel water footprint optimization task.

According to an embodiment of the present disclosure, for another example, a pre-stored hotel water footprint optimization task may be obtained from other electronic devices, and then executed locally at the electronic device. According to the embodiment of the disclosure, the electronic device may be in communication connection with other electronic devices, and the communication mode is not limited.

According to embodiments of the present disclosure, an electronic device may include, for example, a notebook, a smartphone, a desktop, a server, and so forth.

In operation S102, a hotel water footprint optimization task is performed to obtain an investment budget cost for a hotel water footprint reduction retrofit.

According to the embodiment of the disclosure, the investment budget cost is the capital investment of various water-saving devices required to be purchased when the hotel water footprint is transformed. The hotel management mainly aims at profit, the high investment budget cost can influence the decision of a hotel operator, the investment budget cost for reconstruction is reduced, the capital burden of the hotel is reduced, and the investment willingness of the hotel operator and the feasibility of the hotel reconstruction project are increased.

Inputting the investment budget cost into an investment budget cost function in order to output a plurality of candidate equipment procurement plans in operation S103; wherein each candidate device procurement plan comprises the type of candidate device to be procured, the unit price of each candidate device, the quantity procured by each candidate device, and the year procured by each candidate device.

According to an embodiment of the present disclosure, the investment budget cost function f1(x) includes:

according to an embodiment of the present disclosure, the investment budget cost function f₁(x) The constraints in the candidate device procurement scheme include:

according to an embodiment of the present disclosure, the investment budget cost function f₁(x) The constraint in the candidate device procurement scheme includes that the procurement quantity of the candidate devices is a natural number.

According to embodiments of the present disclosure, the procurement number of candidate devices may be 0, 1, 2, 3, etc.

According to an embodiment of the present disclosure, the investment budget cost function f₁(x) The constraints in the candidate equipment procurement arrangements include that the investment budget cost is less than the annual budget.

In operation S104, a water session corresponding to each candidate device procurement plan is determined according to each candidate device procurement plan.

According to an embodiment of the present disclosure, determining a water session amount corresponding to each candidate device procurement scheme according to each candidate device procurement scheme includes: and determining the water footprint quantity corresponding to each candidate equipment purchasing scheme according to the water footprint function.

According to an embodiment of the present disclosure, the water footprint function includes a direct water footprint function and an indirect water footprint function.

According to an embodiment of the present disclosure, a direct water footprint function WF_{Direct connection}The method comprises the following steps:

indirect water foot trace function WF_{Indirect connection}The method comprises the following steps:

in operation S105, a return on investment period corresponding to each candidate equipment procurement plan is determined according to each candidate equipment procurement plan.

According to an embodiment of the present disclosure, determining the return on investment period corresponding to each candidate equipment purchasing scheme according to each candidate equipment purchasing scheme includes: and determining the return on investment period corresponding to each candidate equipment purchasing scheme according to the return on investment period function.

According to embodiments of the present disclosure, from a property investment perspective, a property is considered an entity with an emphasis on total property value, including cash flow of capital income and cash flow of property including remaining value (return on investment period). The shorter the return on investment period, the faster the fund withdrawal speed, and the lower the investment risk, which is an indicator of investment concern. The present example uses a discount recovery period (DCF) analysis and evaluation method to evaluate the financial impact of investment.

The discount recovery period is also called dynamic recovery period, and refers to the time required for compensating all investment by the inflow of project cash flow under the condition of considering the capital and time values. Because the water footprint reduction and transformation of the hotel can be completed in years, the time value of the hotel investment needs to be considered, and the discount recovery period is introduced. The discount recovery period refers to the year required to recover the original investment amount from the net cash flow for the discount, and the method discounts the desired cash flow at capital cost, taking into account risk factors and the time value of the currency.

The calculation method of the discount recovery period value is as follows:

f₃(x)＝DPP＝M+|CDCF^M|/DCF^M+1

from the above formula, to calculate the return on investment, the cash flow of cash discount and the cash flow of cash discount accumulation are calculated first. The cash flow of the discount of the j year is the current value of the expected cash flow in a certain time in the future. The cumulative cash-out flow for the j-th year is equal to the cumulative cash-out flow for the j-1 th year plus the expected cash-out flow for the j-th year.

The specific calculation formula is as follows:

DCF_j＝CF_j/(1+d)^j

CDCF_j＝CDCF_j-1+DCF_j

wherein the content of the first and second substances,

j is less than or equal to M, and M belongs to J;

j is less than or equal to M +1, and M +1 belongs to J.

The calculation of the above indexes requires the calculation of the CF for the occurrence of the inflow of investment project gold_j. The net cash inflow of the j year is the cash income of the j year minus the cash expenditure of the j year, wherein the cash income of the investment project mainly comes from the water cost and the electricity cost saved by purchasing energy-saving equipment, and the cash expenditure of the investment project mainly is the fund spent on purchasing various types of equipment in the year, and the calculation formula is as follows:

CF_j＝CF2_j-CF1_j。

in operation S106, a target plan corresponding to the investment budget cost is determined from the plurality of candidate equipment procurement plans according to the water footprint amounts and the return on investment periods corresponding to the plurality of candidate equipment procurement plans.

According to the embodiment of the disclosure, determining a target scheme corresponding to the investment budget cost from a plurality of candidate equipment purchasing schemes according to the water footprint amount and the return on investment period corresponding to the plurality of candidate equipment purchasing schemes comprises: determining a target solution corresponding to the investment budget cost from the plurality of candidate equipment procurement solutions according to a target function, wherein the target function f (x) comprises:

f(x)＝f₁(x)+f₂(x)+f₃(x)

and taking the candidate equipment purchasing scheme corresponding to the maximum value of the target function as a target scheme.

According to an embodiment of the present disclosure, the objective function calculation formula further includes a normalization formula, the normalization formula is used for f₁(x)、f₂(x) And f₃(x) And (6) carrying out normalization processing.

According to an embodiment of the present disclosure, the normalization formula includes:

wherein the content of the first and second substances,

y_normdenotes f₁(x)、f₂(x) And f₃(x) Normalizing the processed values;

y_maxdenotes f₁(x)、f₂(x) And f₃(x) Maximum value of (d);

y represents f₁(x)、f₂(x) And f₃(x) Calculating the resulting value;

wherein, the f₁(x) The maximum value of (c) is the investment budget cost, f₂(x) The maximum value of (c) is the amount of water footage that can be saved assuming a hotel purchases all equipment, f₃(x) The maximum value of (c) is the project lifetime.

For further understanding of the present disclosure, further description is provided in specific cases:

taking the water footprint reduction and transformation of a hotel in the sea as an example:

the hotel low-water footprint certification finds that a large amount of resources are wasted every year due to the old hotel equipment, and the hotel water footprint reduction and reconstruction are planned through a mode of purchasing and installing water-saving and energy-saving products.

The reconstruction plan includes:

the common high-flow water tap and the shower head installed in each room are replaced by a novel high-pressure low-flow water-saving water tap and a novel water-saving shower head.

The water-saving toilet bowl is replaced by the common toilet bowl of the guest room of the hotel, so that 2-3L of water can be saved during flushing each time, and the cleaning effect can be enhanced by strong water pressure.

Part of incandescent lamps of guest rooms of the hotel are replaced by LED energy-saving lamps, so that 90% of energy can be saved, and the service life is longer.

An energy-saving air conditioner and an energy-saving washing machine with lower energy consumption are installed.

The distributed photovoltaic power generation system can be arranged on the cement surface of the flat roof of the hotel.

Based on the transformation plan, candidate equipment to be purchased is determined to comprise an energy-saving air conditioner, a high-efficiency energy-saving washing machine, an LED lamp, a water-saving faucet, a water-saving toilet bowl, a sensor switch of the lamp, a water-saving shower and a photovoltaic grid-connected system.

Due to the limitation of expenses of hotel operation, the cost of the reconstruction investment budget of the hotel is 16 ten thousand yuan, the reconstruction plan is performed in four years, wherein the reconstruction budget of the first three years is 2 ten thousand yuan, and the reconstruction budget of the fourth year is 10 ten thousand yuan.

Firstly, original transformation plan:

based on the investment budget cost and the candidate equipment to be purchased, the hotel staff draws up a transformation plan for purchasing the water-saving and energy-saving equipment to reduce the water footprint of the hotel. The reconstruction plan made by hotel staff costs 9.8 ten thousand yuan, and the water footprint of 2031 cubic meters can be saved every year after the complete installation is successful. The specific modification scheme is shown in table 1.

TABLE 1 original transformation plan

Secondly, the optimized transformation plan is as follows:

by adopting the hotel water footprint optimization method provided by the disclosure, a hotel water footprint reduction transformation scheme is drawn up based on the investment budget cost and candidate equipment to be purchased. The specific modification schedule is shown in table 2.

TABLE 2 optimized transformation plan

And comparing the optimized modification plan with the original modification plan by combining the tables 1 and 2, wherein the optimized modification plan increases the purchase quantity of the LED lamps and the water-saving taps and reduces the purchase quantity of the high-efficiency energy-saving washing machine.

The original and optimized transformation plans were compared and the results are shown in table 3.

TABLE 3 original and optimized transformation plans

As can be seen from Table 3, the reduced water footprint per year for the optimized transformation plan compared to that performed by the original transformation plan increased from 2031 cubic meters to 2387 cubic meters, the return on investment period decreased by 1.8 years, and the capital spent decreased from 98607 dollars to 44215 dollars. The method disclosed by the invention is adopted, and by comprehensively considering three factors of investment budget cost, reduced water footprint amount and return on investment period, the water footprint of the hotel can be reduced and transformed with the least investment budget cost and the shortest discount recovery period, and the water footprint of the hotel is reduced as much as possible.

The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.