Air indirect cooling method and system for ammonia absorption type composite refrigeration cycle

Abstract

The invention relates to a method and a system for indirect air cooling for ammonia absorption composite refrigerating circulation. For overcoming the drawback of huge compressor power consumption in a high-temperature period in a method and a system for indirect air cooling of parallel normal and reverse refrigerating circulation working medium, ammonia absorption refrigeration is adopted to replace compressor refrigeration, thereby ensuring the advantages of the method and the system and considerably reducing energy consumption of operation in the high temperature period. And a multi-stage air-water serial connection cooling absorber is formed by using a three-dimensional rough panel or a packing plate-fin heat exchanger as a basic unit to replace the conventional vertical falling film water cooling absorber, thereby saving a large amount of cooling water and improving a performance-price ratio. The method and the system can realize zero emission of water vapor of a cooling system of a steam turbine, have strong environmental adaptability, and can expand the application regions of air cooling technology into the regions in temperate and subtropics zones. The method and the system are novel and unique in concept, mature in technology, easy to implement, and wide in application range and region. After being popularized, the method and the system can produce huge energy-saving, emission-reducing, water-saving economic benefits and social and environmental benefits.

Description

technical field [0001] The present invention relates to the condensers of thermal power, nuclear power, gas-steam combined cycle, integral coal gasification power generation and solar thermal power generation, or the condensers of various industries such as petroleum, chemical industry, metallurgy, textile, papermaking, food and pharmaceuticals, etc. The invention relates to an indirect air cooling method and system for the cooled process medium (referred to as working medium) of large and medium-sized coolers, specifically an air indirect cooling method and system for ammonia water absorption compound refrigeration cycle. Background technique [0002] Exhaust steam condensers of thermal power, nuclear power, gas-steam combined cycle, integral coal gasification power generation and solar thermal power generation, as well as large The cooling and condensation system of the working medium in the heat removal system of the medium-sized cooler can be divided into a wet cooling s...

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Problems solved by technology

In order to carry forward the advantages of simple installation, extremely small power consumption, low cost and easy maintenance of the ammonia water absorption refrigeration device, and overcome its disadvantages that it is difficult to enlarge, the present invention further proposes two improvement measures: one is to change the absorber from water cooling to multiple The second is to change the vertical shell-and-tube spray falling film absorber into a three-dimensional rough panel or packed plate-fin heat exchanger, so that both It can improve its absorption efficiency, and can reduce the size of the equipment by taking advantage of the advantages of the compact structure of the plate-fin heat exchanger (referring to the heat exchange area per unit volume of the heat exchanger) that is much higher than that of the shell-and-tube type

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