Two-stage absorption refrigeration circulation system based on double working pairs and refrigeration method thereof

Abstract

The invention discloses a two-stage absorption refrigeration circulation system based on double working pairs and a refrigeration method thereof. The circulation system comprises a refrigeration working medium circulation loop, a low pressure side lithium bromide solution circulation loop and a high pressure side lithium chloride solution circulation loop. According to the two-stage absorption refrigeration circulation system based on the double working pairs and the refrigeration method thereof, refrigeration media enter a low pressure side absorber after coming out of an evaporator to be adsorbed by lithium bromide solution, lithium bromide weak solution in the low pressure side absorber is pumped into a low pressure side generator and absorbs heat in the low pressure side generator to produce working medium steam under intermediate pressure, the working media then enter a high pressure side absorber and are absorbed by lithium chloride saline solution with a higher steam pressure, lithium chloride weak solution in the high pressure side absorber enters a high pressure side generator and absorbs heat to produce high-pressure working medium steam, the high-pressure working medium steam enters a condenser and is cooled to be liquid in the condenser, and then the liquid working media enter the evaporator after being throttled and evaporate and absorb heat in the evaporator and output cold air. According to the two-stage absorption refrigeration circulation system based on the double working pairs and the refrigeration method thereof, temperature of a driving heat source of the absorption refrigeration system is reduced to less than 75 DEG C through series connection of the double absorption working media with different steam pressures, the low-grade heat energy utilization warm area is enlarged, the utilization rate of low-grade heat energy is improved, and the application prospect is wide.

Description

technical field [0001] The invention relates to low-temperature heat energy recycling technology, in particular to a two-stage absorption refrigeration cycle system based on a duplex pair and a refrigeration method thereof, belonging to the field of air-conditioning equipment. Background technique [0002] In the process of industrial production, such as the production of cement, sulfuric acid, and glass lamp industrial products, a large amount of waste heat resources are discharged into the environment in various forms, causing serious energy waste and environmental pollution. In addition, there are abundant geothermal resources and solar energy in nature. Therefore, the recovery of industrial waste heat and the utilization of renewable energy have important practical significance and engineering application value for alleviating environmental pollution and reducing the consumption of fossil fuels. [0003] Today's awareness of environmental protection is gradually rooted ...

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Problems solved by technology

[0002] In the process of industrial production, such as the production of cement, sulfuric acid, and glass lamp industrial products, a large amount of waste heat resources are discharged into the environment in various forms, causing serious energy waste and environmental pollution

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