A cogeneration system of transcritical air conditioning and seawater desalination

Abstract

The invention discloses a transcritical air conditioner and seawater desalination co-production system which comprises a transcritical air conditioner with a refrigerating cycling unit and a low-temperature multi-effect distillation apparatus. The low-temperature multi-effect distillation apparatus comprises a multi-effect distillation unit, a fresh water collection pipeline used for collecting liquid fresh water and a concentrated wastewater external draining pipe used for collecting tail end concentrated seawater, an air cooler of the refrigerating cycling unit is divided into two or more sections in the flow direction of a refrigerating agent, and from a first-effect distillation unit body, all sections of the air cooler are sequentially connected into corresponding effect distillation unit bodies to serve as air-cooling modules. By means of the transcritical air conditioner and seawater desalination co-production system, the use ratio of the low-temperature multi-effect distillation apparatus on the exhaust heat generated by the transcritical air conditioner and the fresh water yield of the low-temperature multi-effect distillation apparatus are increased, and the air cooler of the transcritical air conditioner is directly installed inside distillation unit bodies of all effects, so that the whole system is more compact, and the whole size is reduced.

Description

technical field [0001] The invention relates to seawater desalination technology, in particular to a transcritical air conditioner and seawater desalination combined production system. Background technique [0002] In recent years, household air conditioners in my country have become increasingly popular in cities. From 2001 to 2013, the output of my country's household air conditioner market increased at a compound annual growth rate of 17.29%. In 2013, the output of my country's household air conditioners was 130.57 million units. In summer, when the household air conditioner is used for cooling, its main function is to cool down the room, and the condensation heat of the air conditioning system is directly discharged into the atmosphere without being utilized. When the refrigeration unit operates under air-conditioning conditions, it emits a large amount of condensation heat to the atmosphere, usually the condensation heat can reach 1.15 to 1.3 times the cooling capacity...

AI Technical Summary

Problems solved by technology

[0008] At present, the small and medium-sized low-temperature multi-effect seawater desalination systems mostly consume primary energy because they cannot obtain a stable waste heat source, and the cost of water production is very high. Although some researchers have proposed a device for desalinating seawater using air-conditioning heat, the application number is 200610124010.1 The patent document discloses an integrated air-conditioning refrigeration and seawater desalination device, including a compressor, a condenser, an expansion valve, an evaporator, an induced draft fan, an exhaust fan and a spraying system. The fan is set on one side of the condenser, and the condenser and the evaporator are connected through an expansion valve. The air duct is provided with an air inlet on one side of the evaporator, and the spray system is arranged between the condenser and the exhaust fan

[0009] Although the above-mentioned device utilizes the waste heat of the air conditioner to desalinate seawater, the temperature of the waste heat generated by the general air conditioner is relatively low, generally only 40-50°C, the actual fresh water yield is low, and the economy is extremely low, which cannot meet the actual water supply application.

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