The Heat Exchange Station And Secondary Network System Energy Saving Analysis And Modification

The development of urban central heating has become an important symbol of urban modernization. With the rapid development of urbanization, the rapid growth of the central heating area of northern China, used for central heating energy consumption is also growing. In the era of energy saving and environment protection is increasingly urgent, how to reduce the energy consumption of the district heating has penetrated into every link of the central heating system, including heat as the efficient use of energy, the reasonable distribution network, the efficient conversion of heat in the heat exchange station and heat consumption of the end building.In the past, people’s research focuses on energy efficient conversion of the heat source and distribution efficiency of primary heating network. For heat exchanger station and secondary network system, due to its small size, less heat, tend not to be taken into account.However, If wasted heat which in hundreds of heat exchanger station summary will be a big part of the heat.This article through research and test analysis to two heat exchang er station and secondary pipe network system in a university campus management problems existing in the maintenance of system operation.First, building energy-saving evaluation system to the heat exchange station and pipe network system, determine reasonable assessment to determine whether a circulating pump type selection, system power lose heat than is reasonable, whether the circulation flow rate per unit area in accordance with standard method.Second, from theoretical analysis of the heat exchange station is derived for the return water temperature is to be able to realize the change in the temperature of the outdoor weather changes, and determined the calculation method for the backwater temperature changes; Based on graph theory and the fluid network theory of knowledge, analyzes the principles of heating pipe network hydraulic calculation is derived.Third, heat exchanger station on campus and secondary pipe network system in detail, including heat exchanger station layout, model, parameters of the equipment within the station, heating pipelines laying mode, insulation type, diameter, length and layout. Statistical investigation of heat exchanger station normal operation according to the total, including power consumption, heating load and so on, and carries on the analysis of inspection appraisal whether accord with a standard to askFourth, in heating season, heat exchange station and secondary pipe network operation parameters are detailed test, combined with theoretical knowledge, the operation of the heating system energy saving effect. For heat exchange station, major reform measures is to improve the automation level of, the circulating water pump with frequency converter, and furnish the climate compensator, to achieve "on-demand heating". For hydraulic misadjustment problems that exist in the heating pipe network, in the heating and air conditioning system hydraulic calculation software (HACNet) hydraulic balance of the simulation under the guidance of regulationFifth, in the process of heating system operation found that some of the other problems solving measures are put forward, including heat pipe into the water problems, the problem and outdoor heating pipe insulation, heating pipelines or networks according to different load characteristics of the points at the temperature control.The research results of this paper is based on a university campus test of practical operation of heating system, energy-saving renovation measures are feasible. Therefore, similar to heat transfer station system provide certain reference for energy saving transformation of experience.