Scheme Design Of Heat Supply Retrofit For Thermal Power Unit

Energy conservation has been advocated by the national theme, which is the goal pursued by the CHP. However, as with the increasing large-scale of domestic heating units, heating technology is also diversified, and therefore it is imperative to selecte economical heating mode for the different heating areas. With the accelerated pace of the city, heating area gap becomes larger, more central heating in urgent need of connection of the heat source. Taking into account the limited demand in some parts of the electrical load, to ease the thermoelectric contradiction, and tap the potential of existing heating heating unit is urgent priority.In addition, some district heating rely mainly on small heating unit, which scramble electrical load with the large condensing steam turbine in the heating season. It sends supply coal consumption increased, resulting in waste of energy. Some of the original non-heating area has added heating demand, for which it is necessary carry out the original large condensing unit heating transform and explore its maximum heating capacity.This paper selects Jiamusi, Xining, Tianjin, respectively, as cold areas, secondary cold regions, warmer regional representatives, and the definition of heating period average generation standard coal consumption rate as the economic evaluation indicators. Firstly, based on a 350MW power plant system, exploit Ebsilon software to simulate, and verify the accuracy and reliability of the data with actual data. Select 300MWcondensate pumping unit and 350MW condensate pumping Unit as a case on this basis, and transformate them with absorption heat pump and a high backpressure. Then compare different heating mode at the same heat load conditions and explore the largest geographical suitability heating potential. To sum up:Under the same heat load conditions, high back pressure is a preferred embodiment of the heating mode for cold regions whose heating load is larger, the optimal solution is the secondary cold regions and warmer regions. For 350MW units, high backpressure heating scheme of cold regions has the greatest potential. While 300MW unit with the higher extraction pressure, the exhaust latent heat of high back pressure transformation unit is low, resulting in a higher potential of absorption heat pump heating scheme. However the secondary and warmer regions in cold regions have shown absorption heat pump heating programs with the greatest potential. The results for the different regions provides a reference to select a more economical heating program.