Continuous solar pump-free auto-cascade absorption type refrigerating system

Abstract

The invention provides a continuous solar auto-cascade pump-free absorption type refrigerating system. The system has the characteristics of realizing deep refrigeration by using solar energy as a driving heat source, adopting pump-free auto-cascade absorption type refrigeration, using binary or multi-element zeotrope as a refrigerant and using DMF (N,N-dimethyl formamide) as an absorbent and the like. Therefore, the application of the solar energy in the fields of industry, agriculture and the like can be expanded, the absorption type refrigeration is propelled to a deep refrigerating temperature zone, and the application range of absorption refrigeration is expanded. The absorption type system adopts pump-free auto-cascade cycle, so the system has the advantages of no noise, no vibration, little refrigerant leakage and the like and is particularly suitable for the places with strict requirement for environmental noise.

Description

technical field [0001] The invention relates to a continuous solar self-cascading pumpless absorption refrigeration system, in particular to a solar-driven absorption refrigeration system, a pumpless absorption refrigeration system, a continuous absorption refrigeration system and a self-cascading refrigeration system. Background technique [0002] At present, among the conventional energy sources used by people, fossil energy occupies a dominant position. But on the one hand, fossil energy is a non-renewable energy source. With continuous consumption, there are less and less fossil energy available for people to use; on the other hand, a large amount of environmentally harmful substances such as carbon dioxide and sulfur dioxide will be produced while using fossil energy. . The harm caused by the use of fossil energy by human society all year round, such as the exhaustion of energy and the deterioration of the environment, has become quite serious. In this context, solar ...

AI Technical Summary

Problems solved by technology

However, some defects of solar energy, such as low energy flux density and energy instability, greatly limit its utilization value.

At present, the commonly used solar energy utilization methods have shortcomings: for example, the efficiency of solar photovoltaic power generation is relatively low and the cost is relatively high, and the temperature of heat energy obtained through solar photothermal conversion is relatively low, making it difficult to further utilize, etc.

However, the ordinary absorption refrigeration cycle cannot obtain a lower refrigeration temperature due to its own technical defects

The patent (03115631.2) uses a self-cascading absorption refrigeration system to achieve a lower refrigeration temperature, but the self-cascading absorption system uses a solution pump to increase the solution pressure, and the solution pump consumes a lot of energy, making the overall efficiency of the system very low

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