Energy-saving operating mode for recovering heat of central air-conditioner and supplying domestic hot water

Abstract

The invention relates to an energy-saving operating mode for recovering heat of a central air-conditioner and supplying domestic hot water. The system for recovering heat of the central air-conditioner and supplying domestic hot water comprises a central controller automatic control system, a cold water unit, a cooling tower, a domestic hot water charging system, a heat recovery unit system and a constant-temperature hot water supply system. The system for recovering heat of the central air-conditioner and supplying domestic hot water has the following advantages that: (1) the system can be used for producing domestic hot water by two operating ways according to seasons: in spring and autumn transition season, the heat recovery system can be used for producing domestic hot water continuously by utilizing the recovered heat and also producing basically same amount of coldness to charge the original chilled water system simultaneously during operation, while the operation of other refrigerating units can be stopped or reduced; in summer, the heat recovery system and other cold water units operate simultaneously, and the cooling water of other units is utilized for pre-heating insulating water tanks to charge water; (2) two insulating water tanks are arranged to charge, heat and supply water alternatively, thus a set of complete hot water heating and supplying system is formed, and constant-temperature domestic hot water can be supplied stably; and (3) the system has remarkable economical efficiency.

Description

Technical field: [0001] The invention relates to a combined operation mode of heating and cooling of a central air conditioner, and more specifically relates to an energy-saving operation mode of heat recovery production and domestic hot water supply of a central air conditioner. Background technique: [0002] At present, for some public buildings such as hotels, hotels, hospitals, colleges and bathing centers in summer, on the one hand, when the central air conditioner is running, it discharges a large amount of condensation heat directly into the atmosphere or through cooling towers; Gas boilers or electric water heaters supply domestic hot water. If the heat of condensation can be recycled to produce domestic hot water through a system, it will not only reduce the discharge of condensation heat, reduce the urban "heat island" effect, but also save fuel such as oil and gas used to produce domestic hot water, This will kill two birds with one stone. Now, some manufacturer...

AI Technical Summary

Problems solved by technology

[0003] 1) The temperature of the recovered heat to heat the domestic hot water is relatively low and cannot meet the requirements;

[0004] 2) When recovering the condensation heat of cooling water,

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