Single-stage balance type ammonia-water re-absorption type heat pump circulation equipment and heat supplying method

Abstract

The invention relates to single-stage balance type ammonia-water re-absorption type heat pump circulation equipment and a heat supplying method. The single-stage balance type ammonia-water re-absorption type heat pump circulation equipment includes a solution circuit, a freezing medium steam pipeline, a backwater supplying pipeline and a driving heat source. The solution circuit includes a high pressure generator, a high pressure absorber, a low pressure generator, a low pressure absorber, two throttle valves, a solution mixing tank, a solution separating tank, a solution circulating pump, a high temperature solution heat exchanger and a lower temperature solution heat exchanger. The freezing medium steam pipeline includes a high pressure freezing medium steam pipeline and a lower pressurefreezing medium steam pipeline. The backwater supplying pipeline includes a water supplying pipeline and a backwater pipeline. The driving heat source includes a high temperature driving heat sourceand a lower temperature driving heat source. The heat supplying method by using the single-stage balance type ammonia-water re-absorption type heat pump circulation equipment includes a backwater supplying and circulating process, an ammonia solution circulating process and an ammonia steam pipeline running process.

Description

technical field [0001] The invention relates to the field of solar heat utilization and heat pump air conditioning, in particular to a single-stage balanced ammonia-water reabsorption heat pump cycle equipment and a heat supply method. Background technique [0002] China is the world's largest energy consumer and CO 2 The country with the largest emissions is facing severe pressure on energy conservation and emission reduction. Vigorously developing solar energy and other renewable energy sources is an important direction for addressing climate change, promoting energy conservation and emission reduction, and mitigating environmental pollution. [0003] At present, solar energy development and utilization methods are relatively simple, and most of them are low-temperature hot water. Solar heating, cooling, industrial heating and solar thermal power generation have been applied, but are far from reaching scale. Among the various implementations of solar heating, under give...

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Problems solved by technology

The energy density of solar energy is low, and solar radiation is intermittent and unstable due to day and night and weather changes

However, the heating requirements are stable and reliable; the ambient temperature is low in winter and the sunshine time is short, which will increase the heat loss of the solar system, and the heat collection temperature is not high, but the efficiency reduction will lead to the inability to meet the heating load requirements

Theoretically, conventional absorption and adsorption heat pumps driven by thermal energy combined with solar collectors can be used for heating, but the traditional absorption or adsorption heat pump cycles using water as the working fluid are difficult to meet the requirements of low-temperature freezing environments, and ammonia and other low-boiling-point working fluids are used The heat pump system requires a high temperature of the driving heat source (generally greater than 120°C), and it is completely driven by solar collectors, and the working time is short or it is difficult to start

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