Method and system for co-production of air conditioner and advective seawater desalination device

Abstract

The invention discloses a method for cogeneration of an air conditioner and an advection type sea water desalting device. The method comprises the following steps: condensation heat in the refrigeration process of the air conditioner is used as a heat source, and an advection type low temperature multiple-effect distillation method is adopted to conduct sea water desaltation; fresh water steam in the former effect enters the latter effect to be subjected to condensation, the temperature of the fresh water steam is reduced effect by effect, and the temperature of the fresh water steam generated in the last effect is lower than 20 DEG C; sea water in a first sea water source is taken to condense the fresh water steam generated in the last effect; sea water in a second sea water source is taken as sea water to be desalted, and the sea water to be desalted is preheated through fresh water and concentrated sea water generated in other effects, wherein the temperature of the second sea water source is greater than that of the first sea water source. The invention further discloses a system for cogeneration of the air conditioner and the advection type sea water desalting device. Temperature difference of low temperature waste heat generated by the air conditioner and the sea water in the sea is utilized, so that the fresh water productivity and the energy utilization rate are improved.

Description

technical field [0001] The invention relates to seawater desalination technology, in particular to a method and system for co-production of an air conditioner and an advection seawater desalination device. 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...

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Problems solved by technology

[0007] 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

Although the above-mentioned device uses the waste heat of the air conditioner to desalinate seawater, it only uses single-effect work, and the temperature of the waste heat generated by the air conditioner is relatively low, generally only 40-50°C, and the actual fresh water yield is low, which cannot meet the actual water supply application.

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