Hot water supply method and system coupled with first type and second type absorption heat pump

Abstract

The invention relates to a hot water supply method and system with a coupled first-kind absorption heat pump and second-kind absorption heat pump. The first-kind absorption heat pump in a power plant can be changed to operating all the year round from operating only in the heating season, the utilization rate is increased, heat supply capacity and heat supply safety and reliability of the power plant are improved, low-grade waste heat of the power plant is fully recycled, and heat exchange irreversible loss can be reduced. Meanwhile, by means of the hot water supply mode of coupling the first-kind absorption heat pump and the second-kind absorption heat pump, demands of heat users for hot water at different temperatures are met; exhaust steam waste heat of a steam turbine can be fully utilized; low-temperature tap water is skillfully utilized for step-by-step temperature rise on the aspect of heat use demands and cooling water source parts of the second-kind absorption heat pump, and heat of one-time heating network supplied water produced by the first-kind absorption heat pump is fully utilized.

Description

technical field [0001] The invention relates to the field of hot water supply, in particular to a hot water supply method and system coupled with a first type and a second type absorption heat pump. Background technique [0002] Absorption heat pumps often use lithium bromide solution as a working medium, which has good energy saving, environmental protection and economic benefits, and has been widely used in thermal power plant waste heat recovery in recent years. The first type of absorption heat pump is also called heat-increasing heat pump. It uses a small amount of high-grade heat source (such as steam, high-temperature hot water, etc.) as a driving heat source to recover low-grade waste heat, and finally obtain medium-temperature hot water at about 80°C. The COP of the first type of absorption heat pump is greater than 1, generally 1.5 to 2.5. The second type of absorption heat pump is also called heating type heat pump, which uses a large number of medium-temperature...

AI Technical Summary

Problems solved by technology

However, during the non-heating period, residents have no heating demand, and the first type of absorption heat pump in the power plant is idle, which causes a waste of resources to a certain extent

At present, public bathrooms and swimming pools in northern cities have year-round and stable hot water demand, and small coal-fired boilers are usually used for hot water supply, which brings certain environmental pollution problems

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