Abstract: An absorption refrigerator using a circulation cycle of a regenerator, a condenser, an evaporator, and an absorber includes temperature sensors, a storage unit storing the approximation function for obtaining the second concentration based on second detection results obtained by each of the temperature sensors, a calculation unit to apply the second detection results to the approximation function to obtain the second concentration and a control unit to execute control in accordance with the second concentration. The approximation function is obtained using a response surface method by interpolation or approximation, based on data including first detection results obtained by temperature sensors and first concentrations each corresponding to when each of the first detection results has been obtained.

Abstract: An equipment determination method of a cogeneration system includes the steps of: calculating a total hot water supply load for each day over a predetermined period longer than a specific period based on each unit hot water supply load for hour according to hot water supply use by consumers; setting as a representative period a specific period on which the total hot water supply load becomes at least a low load among the calculated total hot water supply load for each day; determining a capacity of the cogeneration equipment based on the total hot water supply load on the set representative period; and determining a capacity of the plurality of hot water storage tanks based on an amount of hot water supply load exceeding the capacity of the determined cogeneration equipment among each unit hot water supply load for two or more divided periods including the set representative period.

Abstract: An energy equipment determination device includes an initial group determination unit that determines a plurality of candidates of an equipment condition, an operation condition, and a control condition, and sets the plurality of candidates as an initial group, a Pareto solution group calculation unit that applies the initial group determined by the initial group determination unit to a genetic algorithm, and calculates a Pareto solution group when a primary energy consumption and a system cost including an initial cost and a running cost are objective functions, and a financial index calculation unit that calculates a net present value after a specific period from introduction and an internal profit rate after the specific period from the introduction when energy equipment that individually indicates the plurality of Pareto solutions calculated by the Pareto solution group calculation unit is introduced.

Abstract: An equipment determination method of a cogeneration system includes the steps of: calculating a total hot water supply load for each day over a predetermined period longer than a specific period based on each unit hot water supply load for hour according to hot water supply use by consumers; setting as a representative period a specific period on which the total hot water supply load becomes at least a low load among the calculated total hot water supply load for each day; determining a capacity of the cogeneration equipment based on the total hot water supply load on the set representative period; and determining a capacity of the plurality of hot water storage tanks based on an amount of hot water supply load exceeding the capacity of the determined cogeneration equipment among each unit hot water supply load for two or more divided periods including the set representative period.

Abstract: An absorption refrigerator using a circulation cycle of a regenerator, a condenser, an evaporator, and an absorber includes temperature sensors, a storage unit storing the approximation function for obtaining the second concentration based on second detection results obtained by each of the temperature sensors, a calculation unit to apply the second detection results to the approximation function to obtain the second concentration and a control unit to execute control in accordance with the second concentration. The approximation function is obtained using a response surface method by interpolation or approximation, based on data including first detection results obtained by temperature sensors and first concentrations each corresponding to when each of the first detection results has been obtained.

Abstract: A thermal load calculation device includes a CFD calculation unit to carry out a CFD calculation using first input parameters to obtain a first calculation result, an approximate function generation unit to generate an approximate function based on a plurality of combination data using a response surface methodology by an interpolation method or an approximation method, the appropriate function for calculating the first calculation result based on the plurality of first input parameters, each of the plurality of combination data being a combination of the first calculation result by the CFD calculation unit and the plurality of first input parameters used in the CFD calculation and a thermal load calculation unit configured to calculate the thermal load of the predetermined period in the specific space by using a second calculation result obtained by applying a plurality of second input parameters to the approximate function.