Integration method for constructing dynamic thermodynamic model of heat supply pipe network
A heating pipe network and thermal model technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to operate flexible thermal power units and inability to obtain dynamic thermal conditions of heating systems.
Active Publication Date: 2019-08-16
HARBIN INST OF TECH
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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 integration method for constructing a dynamic thermal model of a heat supply pipe network belongs to the field of centralized heat supply systems, and mainly comprises the following steps: establishing a pipeline model, wherein the dynamic thermal model of a pipeline is established by a node method; establishing a node model, wherein the node model is established according to energy conservation; carrying out pipe network dynamic thermodynamic modeling; on the basis of the integration method, constructing an inflow pipeline matrix, an initial node matrix of inflow pipelines, an inflow pipeline number matrix and a pipeline initial node matrix, and then integrating all nodes and pipelines to establish a heat supply pipe network dynamic thermodynamic model. The dynamic thermodynamic modelof the heat supply system can be used for simulating and obtaining the dynamic thermodynamic working condition of the heat supply system, and the dynamic thermodynamic model can be used in the heat supply system with multiple heat sources, annular, asymmetric and dynamic hydrodynamic 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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Login to View More IPC IPC(8): G06F17/50G06Q50/06
CPCG06Q50/06G06F30/20
Inventor 郑进福周志刚赵加宁王晋达
Owner HARBIN INST OF TECH