A Composite Heating Control Method Based on BP Neural Network

Abstract

The invention provides a composite heating control method based on BP neural network, which is applied to the composite system of solar energy and soil source heat pump, including: monitoring the outlet temperature of the load side of the water tank, and if the outlet temperature of the load side of the water tank does not meet the requirements for direct supply of the water tank, the soil Source heat pump heating mode; if the outlet temperature of the load side of the water tank meets the direct supply requirements of the water tank, then judge 0.1Q h,nom ≤Q h ≤AQ h,nom Whether it is satisfied, if it is satisfied, the water tank direct supply mode is adopted, otherwise the ground source heat pump heating mode is adopted. The compound heating control method based on the BP neural network of the present invention optimizes the opening conditions of the water tank direct supply mode and the soil source heat pump heating mode, so that the soil source heat pump system is in a high efficiency state, thereby improving the energy efficiency of the unit.

Description

technical field [0001] The invention belongs to the technical field of ground source heat pump air conditioners, and in particular relates to a composite heating control method based on a BP neural network. Background technique [0002] In cold regions, the solar-ground source heat pump composite system can not only solve the problem of soil heat imbalance caused by the operation of a single ground source heat pump, but also has the advantages of high efficiency, environmental protection and energy saving, so it is widely used. The common heating strategies of composite systems are divided into series, parallel, and hybrid according to the hot water usage mode of the hot water storage tank in the solar collector system. At present, the research direction of most scholars is to study how to use the heat in the hot water storage tank more efficiently on the basis of series, parallel, and hybrid connections, so as to improve the energy efficiency of the system. For example, th...

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Problems solved by technology

Due to the lack of consideration of the dynamic characteristics of the actual operation of the unit, when the heating load is large, the direct supply mode of the water tank is turned on, and when the load is small, the heat pump is switched to heating. The heat pump operates under low load for a long time, and the energy efficiency of the unit operation Low

And when the direct supply mode of the water tank is turned on under a large load, the heating rate of the solar collector to the water tank cannot keep the temperature of the water tank above the starting temperature, which causes the problem of frequent start and stop of the unit

In terms of the operation and control methods of the solar-ground source heat pump composite system, there are few studies involving the direct heating of the hot water storage tank.

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