| 摘要 |
In a system for supplying a heat by a heat medium, a heat discharged from a customer requiring only a high temperature heat is effectively utilized, and respective prices paid by the customer requiring only the high temperature heat and a customer requiring only a low temperature heat are reduced. In this system, a heat medium discharged by the customer requiring only the high temperature heat is recovered so as to be fed to the customer requiring only the low temperature heat. At this time, a temperature, an amount of flow and the like of the heat medium at an access port of the customer are measured by measuring devices, an amount of heat used by the customer is comprehended, a unit value of the amount of heat is set to be higher in accordance that an arithmetic average of a specific enthalpy of the heat medium at the access port of the customer is higher, and a unit value of the amount of heat of the customer that does not recover the heat medium is set on the basis of an arithmetic average of a specific enthalpy of the heat mediums between at the access port and at a normal temperature and a normal pressure.
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