Two-stage reverse osmosis regeneration heat source tower heat pump system

Abstract

The invention discloses a two-stage reverse osmosis regenerative heat source tower heat pump system which comprises a solution circulating system and a two-stage reverse osmosis regenerating system. The two-stage reverse osmosis regenerating system comprises a first reverse osmosis regenerating system and a second reverse osmosis regenerating system. The solution circulating system is coupled with the first reverse osmosis regenerating system through a heat pump unit (4). The first reverse osmosis regenerating system is coupled with the second reverse osmosis regenerating system through a first reverse osmosis device (10).

Description

Technical field [0001] The invention relates to the technical field of refrigeration and air conditioning equipment, in particular to a two-stage reverse osmosis regeneration heat source tower heat pump system. Background technique [0002] The air source heat pump system absorbs heat from the outdoor air through the evaporator in winter heating conditions, and has a high energy efficiency ratio. However, when the surface temperature of the evaporator is lower than 0°C, the outdoor air is easily affected by frost on the evaporator fins. The normal operation of the system. In order to solve this problem, there are currently two types of approaches. One is to take various defrosting measures against the frosting problem; the other is to use the heat source tower heat pump system that has gradually been paid attention in recent years to replace the air source heat pump system. While avoiding the problem of frosting, it also retains the characteristics of the heat pump system for du...

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Problems solved by technology

In addition, the heat source tower heat pump system has a great comparative advantage over the currently widely used cold and heat source scheme of water-cooled units plus boilers, because there is no need to set up a special boiler as a heat source for it, which saves the investment in boilers and boiler room equipment and the resulting costs. Fuel / gas consumption costs, especially in hot-summer and cold-winter regions with similar cooling loads and heating loads, it is more suitable to use heat source tower heat pumps. In addition, it is also more feasible to transform water-cooled air-conditioning systems based on heat source tower heat pump systems. Therefore, it has great application potential in the energy-saving market. At present, there are very few applications and researches on the heat source tower heat pump system at home and abroad. From the perspective of operation, a major problem to be solved is how to treat the antifreeze solution after moisture absorption. Regeneration, the usual regeneration method is non-boiling regeneration (for example: two patents with application numbers 201010567051.4 and 200910098008.5), this regeneration method has the advantages of low-grade energy utilization, but there are many system links, large irreversible losses and running Complicated shortcomings, there are certain difficulties in the actual promotion process

Patent application 200910307940.4 provides a single-stage reverse osmosis regeneration device for the heat source tower heat pump system. Although the system has the advantages of simple system and strong controllability, it is also easy to generate heat under winter conditions when using a small air source heat pump to heat water. The frosting problem of the air source heat pump evaporator; when regenerating the antifreeze solution with a high concentration, it is easy to make the operating pressure higher and exceed the pressure limit of the conventional reverse osmosis membrane; there is no energy recovery for the high-pressure antifreeze solution, and the loss of mechanical energy is large

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