Efficient two-stage absorption refrigerating device

Abstract

The invention discloses an efficient two-stage absorption refrigerating device. A gas outlet of a high-pressure generator in the efficient two-stage absorption refrigerating device is sequentially connected with cryogenic fluid inlets of a condenser, an intermediate heat exchanging part, a first throttle, an evaporator, a low-pressure solution pump, a low-pressure solution heat exchanger, a low-pressure generator, a high-pressure solution pump, and a high-pressure solution heat exchanger; the gas outlet of the intermediate heat exchanging part is connected with a gas inlet of a high-pressure absorber, a solution outlet of the high-pressure generator is connected with solution inlets of the high-pressure solution heat exchanger, a third throttle and the high-pressure absorber, and the solution outlet of the low-pressure generator is connected with solution inlets of the low-pressure solution heat exchanger, a second throttle and the low-pressure absorber. The invention has simple structure, obviously improves the performance factor and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a high-efficiency two-stage absorption refrigeration device. Background technique [0002] Absorption refrigeration technology is a heat-driven refrigeration technology. Compared with compression refrigeration technology, its main advantage is that it only needs to consume very little electric energy and can utilize low-grade heat energy. Since Carl, a Frenchman, invented the continuous absorption refrigerator in 1860, the absorption refrigerator has been occupying an important position in the market. In recent years, as the voice of energy conservation and environmental protection has become higher and higher, absorption refrigerators have been more favored. In 2000, researchers predicted that the sales volume of absorption refrigerators in 2008 would reach 68.7 million units. [0003] The main disadvantage of the general single-stage absorption refrigeration ...

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Problems solved by technology

[0003] The main disadvantage of the general single-stage absorption refrigeration device is that a higher temperature is required to obtain the cooling capacity with a lower evaporation temperature.

Some researchers have proposed a two-absorber absorption refrigeration system. The idea is to use a part of the refrigerant to cool the absorber, so that the absorber can reach a lower temperature, so that the other part of the refrigerant can be cooled. Produce higher-grade cooling capacity, but this will greatly reduce the performance coefficient of the system

In addition, some researchers have improved the performance of the system by combining ejectors and absorption refrigeration devices to obtain lower-temperature cooling capacity, but the performance improvement is not large, and it may also lead to system instability.

[0004] At present, the practical refrigeration technology that utilizes low-grade heat energy to produce lower-temperature cooling capacity is mainly two-stage absorption refrigeration, but it has the defect of low system performance coefficient.

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