| The heat supply is the enssential need of thousands of households in the north cold region,but also is related to the important matter of nation and people . China is a big energy consuming country, also a deficient country in energy resources. In China, the construction energy consumption approximately took up 1/3 of the total energy consumption, while the energy consumption of the heating in the north accounted for 65% of the construction energy consumption. Therefore, we must implement the energy principle: development and energy saving simultaneously; taking energy-saving in the first place.At present, the efficiency of the central heating system is only 30%. If the ideal efficiency could reach 70%, there will be 40% of the energy saving space, and the potential is tremendous. Under such a background, the author made exploration and research to the parts of saving energy in central heating system in Mudanjiang city. With the support of the relative theories and methods, the realistic aspects of energy consumption in the central heating were analyzed in detail, meanwhile specifically proposed the measures of transformation and optimization.Firstly, from the view of the heat source, the multi-heat sources networking should be carried out. By adjusting the operating ratio, the flexible and complementary is increased, and also the economic and reliable. The state's industrial policy has been clearly defined that the development of cogenerationis is encouraged, as cogeneration projects have synthetic benefit, such as saving energy, improving the environment, stablizing the heating quality and increasing the electricity supply. It is an important measure that improves the ratio of using energy in city, in line with the national sustainable development strategies. Secondly, in the operation equipment of the central heating system---circulating pumps and self-actor valve, with the application of the methods of frequency conversion, velocity modulation and dynamic water balance, thereby circulation pump could operate efficiently and energy-saving. And self-operated flow valve playes a significant role in balancing the pipe network flow of dynamic regulation.Thirdly, the corresponding theory was also utilized in balancing the water of the heating network and reducing the cooling of pipe network, which makes parameters of current capacities, pressure, etc., in each part, satisfy the condition, at the same time save the energy. The direct supply of turbid water and the low temperature hotwater radiation floor respectively improve the energy-saving effect of network and the efficiency of the users.Fourthly, the application of self-control of central heating not only resolves the question of the adjustable and the comfortable of the indoor temperature, but also lay a good foundation for china's on-demand for heat and charging by metering in future, at the same time saving a lot of energy and making a positive contribution to emission reduction and energy saving.This article aims at, by analyzing the potential excavation of the energy saving in each circle of central heating, discussing the practical and feasible transformation measures, providing certain thoughts and methods, with a great desire of making valuable contribution to the field of the central heating... |
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