An integrated method for building a dynamic thermal model of a heating network
A thermal model and heating pipe network technology, applied in data processing applications, instruments, design optimization/simulation, etc., can solve problems such as inability to operate flexibly of thermal power units, inability to obtain dynamic thermal conditions of heating systems, etc.
Active Publication Date: 2021-09-28
HARBIN INST OF TECH
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Problems solved by technology
However, in the published models of dynamic thermal conditions of the heating system, the models of the heating network are usually only represented by the dynamic thermal models of pipes and nodes, and there is no explanation on how to use the dynamic thermal models of pipes and nodes to construct a complete supply chain. The dynamic thermal model of the heat pipe network, therefore, the dynamic thermal conditions of the heating system cannot be obtained, so as to optimize the heat supply of the heat source and save the operating energy consumption of the system
Without affecting the safe and stable operation of the heating system, it is impossible to really use the thermal inertia of the heating system to improve the operating flexibility of thermal power units and promote the consumption of renewable energy
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[0071] see Figure 1-Figure 2 As shown, an integrated method for constructing a dynamic thermal model of a heating network includes the following steps:
[0072] Pipeline model establishment: when the fluid propagates in the pipeline, the temperature at the outlet of the pipeline has a time delay relative to the temperature at the inlet of the pipeline; at the same time, in the process of fluid propagation, due to the heat exchange between the fluid and the external environment, the heat loss of the fluid will be caused.
[0073] In this embodiment, the dynamic thermal model of the pipeline is established by the nodal method. The basic principle of the nodal method is to first consider the transfer time of the temperature in the pipeline, and determine the initial temperature of the pipeline outlet by the pipeline inlet temperature; finally consider the heat loss of the fluid in the pipeline ; The schematic diagram of the node method is shown in figure 1 ;
[0074] First, co...
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An integrated method for constructing a dynamic thermal model of a heating pipe network, which belongs to the field of central heating systems. The main steps of the method are: the establishment of a pipeline model, and the dynamic thermal model of the pipeline is established by the node method; the node model is established, and the node model is based on energy conservation Establish; pipe network dynamic thermal modeling, based on the invented integration method, construct the inflow pipeline matrix, the inflow pipeline start node matrix, the inflow pipeline quantity matrix and the pipeline start node matrix, and then integrate all nodes and pipelines to establish heat supply pipes Network dynamic thermal model. The dynamic thermodynamic model of the heating system of the present invention can be used to simulate and obtain the dynamic thermodynamic working conditions of the heating system, and the present invention can be used in heating systems of multi-heat source, circular, asymmetrical and dynamic hydraulic working conditions.
Description
technical field [0001] The invention belongs to the field of central heating systems, in particular to an integration method for constructing a dynamic thermal model of a heating pipe network. Background technique [0002] The dynamic thermal condition analysis of the heating system not only plays an important role in the operation regulation of the heating system and ensuring the quality of the heating supply, but also plays a key role in the application of randomly fluctuating renewable energy such as wind power in the heating system. The heating pipe network is the connection structure of the components in the heating system, and the establishment of the dynamic thermodynamic model of the complete heating pipe network plays a decisive role in the analysis of the dynamic thermal conditions of the heating system. However, in the published models of dynamic thermal conditions of the heating system, the models of the heating network are usually only represented by the dynamic...
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IPC IPC(8): G06F30/20G06Q50/06
CPCG06Q50/06G06F30/20
Inventor 周志刚郑进福赵加宁王晋达
Owner HARBIN INST OF TECH