Two-stage high and low temperature liquid desiccant air-conditioning system driven by heat pump and controlling method

Abstract

The invention discloses a two-stage high and low temperature liquid desiccant air-conditioning system driven by a heat pump and a controlling method. The two-stage high and low temperature liquid desiccant air-conditioning system driven by the heat pump is characterized by comprising a first level liquid desiccant regenerative circulating system, a second level liquid desiccant regenerative circulating system, a heat pump circulating system and a first draught fan, wherein the first level liquid desiccant regenerative circulating system comprises a first level dehumidifier and a first reproducer; the liquid outlet of the first level dehumidifier is communicated to the liquid inlet of the first reproducer, and the liquid outlet of the first reproducer is communicated to the liquid inlet of the first level dehumidifier, which constitute a first level liquid desiccant regenerative cycle; the second level liquid desiccant regenerative circulating system comprises a second level dehumidifier and a second reproducer; the liquid outlet of the second level dehumidifier is communicated to the liquid inlet of the second reproducer, and the liquid outlet of the second reproducer is communicated to the liquid inlet of the second level dehumidifier, which constitute a second level liquid desiccant regenerative cycle; the heat pump circulating system comprises a first condenser, a throttle valve, a compressor and an evaporimeter; the liquid outlet of the second reproducer is cooled through the evaporimeter and communicated to the liquid inlet of the second level dehumidifier.

Description

technical field [0001] The invention relates to an air conditioning system combined with a heat pump and a solution dehumidification and regeneration system, and adopts a two-stage dehumidification and cooling fresh air treatment mode of variable solution temperature and variable solution concentration and a control method, belonging to the technical field of air conditioning and building equipment energy saving. Background technique [0002] With the increasing diversification of building functions, the energy consumption of building air-conditioning is constantly increasing. As a new air-conditioning concept, air-conditioning with independent temperature and humidity processing is receiving more and more attention and research. The system using solution dehumidification has the advantages of precise air humidity control, excellent air quality after treatment, low power consumption, simple structure, and can be driven by low-grade heat sources. It is the most common form of ...

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Problems solved by technology

[0004] However, the current heat pump-driven solution dehumidification air-conditioning system still has the following shortcomings: 1) It is difficult to achieve dynamic matching of heat between the dehumidifier, regenerator, evaporator and condenser. When the load of air treatment changes, the condensation heat of the system May be more or less than heat required for solution regeneration

However, the air with high temperature and high humidity can be effectively treated with a normal temperature solution, so there are defects in this thermal process, which is also a waste of cooling capacity

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