Two-stage type hot water direct-fired single-double effect composite lithium bromide absorption refrigeration unit

Abstract

The invention relates to a two-stage type hot water direct-fired single-double effect composite lithium bromide absorption refrigeration unit. The absorption refrigeration unit comprises a direct-fired high pressure generator (7), an evaporator, an absorber, a steam generator (13), a hot water generator (15), a condenser, a solution heat exchanger, a solution pump and a refrigerant pump and is characterized by comprising a single effect condenser (16) and a double effect condenser (12); the heat exchange tube bundle of the hot water generator (15) and the heat exchange tube bundle of the single effect condenser (16) are arranged in a cavity; the heat exchange tube bundle of the steam generator (13) and the heat exchange tube bundle of the double effect condenser (12) are arranged in another cavity; the cooling water flow paths of the single effect condenser (16) and the double effect condenser (12) adopt series connection flow paths; and cooling water gets into the single effect condenser (16) and gets out of the double effect condenser (12). The two-stage type hot water direct-fired single-double effect composite lithium bromide absorption refrigeration unit can be used for reducing the generation pressure of the hot water generator and the concentration of a dilute solution for hot water single effect circulation.

Description

technical field [0001] The invention relates to a lithium bromide absorption refrigeration unit. It belongs to the technical field of air conditioning equipment. Background technique [0002] In the past, hot water direct-fired single- and double-effect compound lithium bromide absorption refrigeration units such as figure 1 As shown, the unit consists of a direct-fired high-pressure generator 7, an evaporator 47, an absorber 37, a hot water generator 15, a steam generator 13, a condenser 46, a high-temperature heat exchanger 6, a low-temperature heat exchanger 5, a single Effect heat exchanger 19, double-effect solution pump 26, single-effect solution pump 27, refrigerant pump 25, control system (not shown in the figure) and pipelines and valves connecting various components. Among them, the heat exchange tube bundles of the hot water generator, the steam generator and the condenser are arranged in the same chamber, that is, the cylinder 11, to form a composite low-heat c...

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Problems solved by technology

It is difficult to achieve these goals by selecting the previous hot water direct-fired single-effect composite lithium bromide absorption chiller, and at the same time choose the direct-fired double-effect lithium bromide absorption cold and hot water unit and the hot water single-effect lithium bromide absorption chiller. It will increase the type and number of equipment configurations, thereby increasing the equipment footprint and investment costs

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