A cogeneration system of transcritical air conditioning and advection seawater desalination

Abstract

The invention discloses a transcritical air-conditioner and parallel-flow seawater desalination combined production system, comprising a transcritical air-conditioner equipped with a refrigeration circulation unit and a parallel-flow low-temperature multiple-effect distillation apparatus. The parallel-flow low-temperature multiple-effect distillation apparatus comprises multiple-effect distillation units, a fresh water collecting pipeline used for collecting liquid fresh water and a concentrated waste water discharging pipe used for collecting tail-end concentrated seawater, an air cooler of the refrigeration circulation unit is divided into at least two sections along the flowing direction of a refrigerant, and starting from a first-effect distillation unit, each section of the air cooler is connected with a corresponding-effect distillation unit in sequence and used as an air cooling module. According to the transcritical air-conditioner and parallel-flow seawater desalination combined production system, the air cooler is divided into sections which are installed into the corresponding-effect distillation units of the low-temperature multiple-effect distillation apparatus and used as the air cooling modules, so the low-temperature multiple-effect distillation apparatus has improved utilization rate of heat discharged by the transcritical air-conditioner and enhanced fresh water yield; and since the air cooler of the transcritical air-conditioner is directly installed into the corresponding-effect distillation units, the system has compact integral body and reduced integral size.

Description

technical field [0001] The invention relates to seawater desalination technology, in particular to a transcritical air conditioner and advection type 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 c...

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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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