Cold-and-hot separated type multiple configuration control method and application of double heat source heating system

Abstract

The invention relates to a cold-and-hot separated type multiple configuration control method and application of a double heat source heating system. The method comprises steps as follows: a valve is used for connection and is controlled to be opened, closed or adjusted, so that a main heat source device, an auxiliary heat source device and a heat storage water tank can supply heat for a heat needed side independently and respectively, and a main heat source can be connected with an auxiliary heat source or the front end of the heat storage water tank respectively in series to form series combination and supply heat. In any work state, a high temperature working medium can get in and out of a hot side port of the heat storage water tank only, and a low temperature working medium can get in and out of a cold side port of the heat storage water tank only. Particularly when solar and electrical energy priced according to time is used, the solar energy substitution rate can be improved, and peak load shifting and valley load filling of the electric energy can be achieved. Configuration logic of the method is embedded into software of a control device, so that the device can be intelligentized.

Description

technical field [0001] The invention relates to a cold and heat separation type multi-configuration control method of a dual heat source heating system and a dual heat source heating system applying the method. The invention can be applied to the control unit used in the field of solar thermal utilization. Background technique [0002] In the prior art, a dual heat source heating system with heat storage function is widely used, wherein the main heat source can be solar energy, and the auxiliary heat source can be natural gas, electricity, etc. In this type of heating technology, the heat from the main heat source is generally sent to the heat storage tank (water storage tank) first, and then the heat is supplied from the heat storage tank to the outside. [0003] Auxiliary heat source heating equipment generally has three access methods in the system structure: [0004] First, if figure 1 As shown in , the auxiliary heat source heating equipment 1 is placed in the hot wa...

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Problems solved by technology

The second connection method is also a parallel structure. Compared with the first connection method, this method avoids the mixed flow disturbance to the heat storage tank 3 when the auxiliary heat source heating equipment 1 is put into operation, but it does not solve the problem of the main heat source 2 on the heat storage tank. 3 mixed flow disturbance problem

[0010] There is a common problem in the system structure of the above two main and auxiliary heat sources connected in parallel: when the main heat source 2 is capable of heating, the temperature of the working medium at the top of the heat storage tank 3 is higher than the temperature of the working medium after heat release from the heat demand side 4 but lower than When designing the heating temperature, the heat in this heating stage cannot be used, which is a waste of energy in the transition state

Although the combination of the latter two configurations above solves the problem of energy waste in the transition state, the circulation on both sides and the imbalance of flow on both sides will accelerate the mixed flow disturbance

[0015] Since the above-mentioned system structure in the prior art cannot establish a configuration method that can make the main heat source 2 and the heat storage tank 3 work independently of each other, and there are always unnecessary mixed flow disturbances when the heat storage tank 3 is working, it is seriously reduced The use efficiency of the main heat source 2 and the heat storage efficiency of the heat storage tank 3 are improved, and the effective working time of the heat storage tank 3 is also greatly shortened.

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