Method And Application On Monitoring The Energy Consumption In Central Heating System

Building heating is the main aspect of building energy consumption, central heating is the primary way of building heating, Analysis and evaluation of energy consumption is to promote the efficient operation of central heating system and energy saving technology measures, is also the requirements of production operation management of heating enterprises, this paper is on the energy consumption of the entire process of analysis and evaluation system and analysis system of heat source, heating network, heat exchange station and heat users Main contents and methods, including:(1) Study on factors of the energy consumption of thermal preparation, transportation, conversion and thermal using, energy analysis modal of coal-fired cogeneration, coal-fired boiler, city high-temperature heat pipe network, heat exchange station, outdoor pipe network and heating building is established, this modal based on the real-time monitoring data, based on the flow balance and heat balance principle, the model is solved, modal results are energy consumption indicators in order to evaluate central heating system.(2) The energy consumption evaluation system is studied in this paper in order to evaluate the central heating system comprehensively and objectively, the content of evaluation system, energy consumption index of evaluation system, organization of evaluation system are discussed.(3) According to IAPWS-IF1997 industrial formula, by VC++6.0, enthalpy calculation module is programmed. Compared with the date of literature, the calculation results are consistent, provide the basis for solution of the energy monitoring modal of coal-fired cogeneration and steam pipe.(4) Based on the graph theory, heating pipe network topology is established, based on VC++6.0, central heating system energy consumption analysis system is developed, by man-machine dialogue, central heating pipe network graphic data, coal-fired cogeneration data, coal-fired boiler data, heat exchange station data, outdoor pipe network data and heating building data are input, achieved the automatic storage of energy consumption monitoring data, use the OnToolTip() function, achived the real-time display of the important energy consumption index, use the automatic method for solving path, achived the path computation from heat to the heat transfer station based on the pipe topology quickly, easily and accurately,(5) Establish a suitable definition of parameters and variables and database to analysis of energy consumption model, achieved database and the central heating system SCADA servers for data exchange and real-time analysis of energy consumption indicators.(6) Based on the ADO database access technology, achieved interactive date between software and Microsoft Office Access database, achieved the storage of the heating network chart, node and pipeline properties, energy consumption index quickly and easily.Finally, take one of the central heating system of Jinan for example, Energy analysis results and the actual energy consumption of heating systems is in good agreement, energy consumption analysis can be applied to Central heating system, provide the basis for Energy-saving and operation of central heating system.