Solution regeneration device based on integration of boiling and condensation under low pressure

Abstract

The invention discloses an integrated boiling and condensing solution regenerating device based on low pressure. The device comprises a solution loop, a water vapor condensing loop and a low pressure maintaining loop. The characteristic that the boiling point of a solution decreases under low pressure is fully utilized by the device, water vapor generated through regeneration of the solution condenses and releases heat under high pressure on the same device, the released heat serves as a heat source for regeneration of the solution, integration of boiling and condensing is achieved in the solution regenerating process, the regeneration rate of the solution and the regeneration concentration of the solution can be flexibly adjusted, and therefore the device is compact and flexible and convenient to use, meanwhile, higher solution regeneration efficiency is achieved, and the energy efficiency of the solution regenerating system is improved.

Description

technical field [0001] The invention belongs to the field of design and manufacture of refrigeration and air-conditioning systems, and relates to a solution regeneration device for realizing self-balancing regeneration energy. Background technique [0002] As one of the new cold and heat source solutions for buildings in hot summer and cold winter regions, the heat source tower heat pump system can achieve high-efficiency cooling similar to water-cooled chillers in summer and heating similar to air source heat pumps in winter. Avoid the problem of frosting of the outdoor heat exchanger existing in the heating operation of the conventional air source heat pump in winter. [0003] When the heat source tower heat pump is running for heating in winter, compared with the air source heat pump, it also absorbs heat from the air as the low-level heat source of the heat pump, but unlike the air source heat pump, the heat source tower heat pump uses the solution in the heat source tow...

AI Technical Summary

Problems solved by technology

However, in the heat exchange process between the solution and the air in the heat source tower, because there is a water vapor partial pressure difference between the solution surface and the air, most of the time the water vapor partial pressure in the air is greater than the partial pressure on the solution surface, resulting in air The moisture in the solution enters the solution, which reduces the concentration of the solution. In order to ensure that the solution does not freeze, the freezing point of the solution must be lower than the lowest possible evaporation temperature of the system. The freezing point of the solution is determined by the concentration of the solution, and the reduction of the concentration of the solution will It causes the freezing point of the solution to rise, which affects the operational reliability of the system, so the solution in the heat source tower heat pump system needs to be regenerated

The conventional solution regeneration process requires an external heat source, which leads to the complexity of the heat source tower heat pump system, inflexible use, and affects the efficiency of the system

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