On-line matching adjustment method of heat supply and heat demand in district heating system

Abstract

The invention discloses an online matching adjustment method for heat supply and heat demand of a district heating system, which includes inputting preset parameters, collecting operating parameters in real time, dynamic adjustment of building room temperature, judging whether buildings participate in calculation, real-time calculation of adjustment factors, Water supply temperature - main pipe pressure difference real-time calculation and water supply temperature - main pipe pressure difference real-time adjustment; preset parameters include outdoor design temperature T' out , Indoor set temperature T in‑set,j etc.; the operating parameters include the temperature T of the i-th temperature measuring point of the j-th building in,i,j Etc. Dynamic adjustment of building room temperature with heating area weighted temperature T in,j It is the control target; whether the building participates in the adjustment calculation is based on the opening of the electric control valve of the return pipe; the real-time calculation of the adjustment factor includes the comprehensive room temperature correction factor, etc.; on the basis of the above, dynamically calculate the water supply temperature-main pipe pressure difference adjustment equation, and Adjust the electric regulating valve on the primary side of the heat exchange station and the circulating pump on the secondary side. This method can effectively improve the matching degree of heat supply and heat demand in the district heating system.

Description

technical field [0001] The invention relates to district heating technology, in particular to an online matching adjustment method for heat supply and heat demand of a district heating system. Background technique [0002] At present, my country is the world's largest carbon emitter and will reach the peak of carbon emission in 2030. Coal combustion in urban district heating systems in northern my country is an important factor causing the growth of carbon emissions. Generally speaking, the heat generated in the heat source needs to be sequentially transferred to the radiators in the building through the multi-stage pipe network and multi-stage heat exchange stations for space heating. The heat source, front-stage pipe network and front-stage heat exchange station are usually managed by the heat supply company, while the final pipe network and final heat exchange station directly connected to the building are usually managed by the building property company. Compared with ...

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Problems solved by technology

[0004] In view of the problem that the heat supply and heat demand of the district heating system are not well matched, the object of the present invention is to provide an online matching adjustment method for the heat supply and heat demand of the district heating system. The weighted temperature of the heating area and the opening of the electric control valve of the return pipe take into account the difference between the actual heating parameters of the building and the design heating parameters, and integrate dynamic feedback to the heat supply adjustment equation on the side of the heat exchange station, which can effectively improve the district heating system. Matching degree of heat supply and heat demand

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