E3S Web Conf.
Volume 136, 20192019 International Conference on Building Energy Conservation, Thermal Safety and Environmental Pollution Control (ICBTE 2019)
|Number of page(s)||5|
|Section||Ultra-Low Energy Consumption Building Technology|
|Published online||10 December 2019|
The analysis and research on variable operating condition of exhaust steam and waste heat Cascade utilization system of air cooling heating unit
1 North China Electric Power Research Institute Co., Ltd. Beijing 100045, China
2 Nei Meng Gu Sheng Le Thermoelectric Co., Ltd. . Huhehaote 011517, China
3 North China Institute of Science and Technology, Beijing, 101601, China
* Corresponding author’s e-mail: firstname.lastname@example.org
The series and parallel exhaust heat cascade utilization system was adopted by the large direct air cooling heating units. On the one hand, this system could reduce the adverse impact on power generation; on the other hand, it could reduce the temperature difference of heat transfer through step by step heating, the irreversible loss could be reduced, and the energy utilization efficiency could be made higher. On the basis of grasping the design performance of exhaust steam utilization system and the variable operating performance of main equipment by analysing the data of typical operating conditions, the optimization analysis model of heat pump group and the whole plant was established by this paper. The performance of heat pump unit under variable operating conditions was analysed and calculated, the influence of different exhaust pressure and backwater temperature on the economy of the whole machine was analysed, and the optimal operation mode of the heat pump was obtained. Finally, the pumping and condensing ratio curves under different conditions of winter heating conditions were determined, which could guide the optimal operation of heat pump units. It also provided technical support and basis for deep peak regulation or flexible transformation of heating units.
© The Authors, published by EDP Sciences, 2019
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