Transcritical carbon dioxide heat pump system control method

Abstract

The invention discloses a transcritical carbon dioxide heat pump system control method. The method comprises the steps that A, a transcritical carbon dioxide heat pump system is subjected to static analysis; specifically, the method comprises the following steps that B, the control state conversion of the transcritical carbon dioxide heat pump system is judged, and whether dynamic control needs to be carried out or not is determined by analyzing historical data; and C, collecting and analyzing system parameters to perform dynamic control. According to the water pump, the traditional energy supply efficiency can be improved, and particularly, the CO2 heat pump water heater or the mixing system comprising the water pump is acknowledged to be good in various parameters at present.

Description

technical field [0001] The invention belongs to the technical field of mechanical energy, and in particular relates to a control method for a transcritical carbon dioxide heat pump system. Background technique [0002] At present, many traditional energy supply means have been limited or will be limited on a global scale due to the high potential of the greenhouse effect. CO 2 Heat pump water heaters are currently recognized as heat pump water heaters that are superior to conventional working fluids in all aspects. Studies by scholars from Austria, Norway, Japan and other countries have shown that the annual average COP value of this heat pump heating system can reach more than 3, and it can still provide 90 ℃ hot water in an environment of -20 ℃. Compared with electric heating or gas water heaters, the energy consumption 75% lower. Since the critical temperature of carbon dioxide is low, which is 31.1°C (critical pressure is 73.8bar), when it is applied to systems such a...

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Problems solved by technology

With the increase of heating terminals in the system and the expansion of areas, the number of heat pumps also increases accordingly. Due to historical and developmental reasons, the types of heat pumps in the system are diverse, and the topology between heat pumps and heating terminals in the system The connection relationship and connection methods are also diverse. In this case, the design and use of the heat pump system itself are not optimal.

On the other hand, with the improvement of automation of heat pump systems, many systems have their own simple acquisition and control systems. How to use limited acquisition and control resources to improve the performance of these heat pump systems is not considered in the prior art. The problem

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