Thermal Power Plants Hybrid Heat Supply Technology for Low-Temperature Heat Source Enhancement Economic Analysis

Authors

  • Haoran Xu
  • Chengan Jiang
  • Chengfei Xu
  • Yanni Jiang

DOI:

https://doi.org/10.62051/jmc9c212

Keywords:

low-temperature heat source; hybrid heating; coal consumption rate; heat consumption rate; economic analysis

Abstract

To solve the defects of insufficient heating capacity and high energy cost in the traditional heating mode of the thermal power plant, two 300 MW pumped-condensing air-cooled heating units are retrofitted by adopting a high backpressure operation mode and utilizing the low-temperature heat source quality-improving hybrid heating technology. It is found that when the load is 210 MW and the operating back pressure is 45 kPa and 54 kPa after the retrofit, the consumption of standard coal for every 1 GJ of heat is 8.19 kg and 9.76 kg, which is 16.81 kg and 15.24 kg less than that of the traditional heat supply method. When the load is 250 MW and the operating back pressure is 45 kPa, the consumption of standard coal is 8.65 kg per GJ of heat supplied, which is 16.35 kg less than that of the traditional heating method. The ROI of the retrofit is 49.01%, with a payback period of about 2.04 years, after which it can bring an annual profit of 24.5504 million RMB per year to the power plant. It can reduce the emission of soot by 152.17 t, carbon dioxide by 82.17 t, sulfur dioxide by 258.68 t, and nitrogen oxides by 225.20 t per year. Therefore, this transformation is a green and efficient, energy-saving, and environmentally friendly technology with high economic returns and good prospects, providing a way of thinking about the new heating technology of the power plant.

Downloads

Download data is not yet available.

References

TAN Xiandong, LIU Jun, XU Zhicheng, et al. "Electricity supply and demand situation in the 14th Five-Year Plan under the target of "double carbon"[J]. China Electric Power, 2021, 54(05): 1-6.

Jia Yanbing, Zhang Guolin, Sun Yandong, et al. Situation and suggestions for the transformation of China's coal power[J]. Energy Research and Utilisation, 2023, (01): 16-22.

GUO Xiyan, LIU Jiakang, YANG Zhiping, et al. Multi-objective load optimisation of thermoelectrically decoupled units considering carbon emission[J]. Thermal Power Engineering, 2023, 38(06): 68-79.

Su Peng, Wang Wenjun, Yang Guang, et al. Research on the technical programme for upgrading flexibility transformation of thermal power units[J]. China Electric Power, 2018, 51(5): 8.

CHEN Jianguo, XIE Qiangxian, FU Huairen, et al. Zero-output technology for low-pressure cylinder of steam turbine in 300 MW unit[J]. Thermal Power Generation, 2018, 47(05): 106-110.

YANG Haisheng, ZHANG Tuo, TANG Guangtong, et al. Impact of low-pressure cylinder zero-output technology on deep peaking performance of heating units and peaking compensation standard[J]. Thermal Power Engineering, 2020, 35(06): 268-273.

DONG Wei, SZE Paiyou, WANG Weimeng, et al. Analysis of the impact of high and low pressure bypass heat supply modification on unit peak shifting capacity[J]. Thermal Power Engineering, 2023, 38(08): 169-175.

Chen Xiaoli, Gao Jilu, Zheng Fei, et al. Analysis of the impact of multiple deep peaking modes on thermal power unit performance[J]. Thermal Power Engineering, 2020, 35(12): 26-30.

LIU Chang, GENG Linxiao, WANG Heng, et al. Research on the control strategy of high and low bypass combined heat supply modification[J]. Thermal Power Generation, 2020, 49(11): 126-132.

LUO Yong, CHEN Peng, SU Qi. A preliminary study on design points and performance evaluation indexes of solid thermal storage electric boiler[J]. HVAC, 2019, 49(05): 55-59.

ZHANG Hu-Nan, ZHAO Liang, YIN Hong-Chao. Research and performance analysis of 350MW supercritical unit with high back pressure heat supply modification[J]. Energy Conservation, 2018, 37(04): 6-8.

KONG Xin. CC25-90/10/1.2 type steam turbine low vacuum heat supply modification[J]. Heilongjiang Science and Technology Information, 2016, (06): 99.

Zheng Fengcai, An Fengbo. Analysis of the current situation of domestic condenser and its modification[J]. East China Electric Power, 2002, 30(3): 14-17.

Wang Zheng. Discussion on the calculation method of coal consumption for power supply and heat supply in thermal power plants[J]. East China Electric Power,1992(09):23-24.

SONG Jinshi, ZHONG Ping, LIANG Qiang, et al. Optimisation of the cold end of a unit with organic power ventilation cooling tower[J]. Thermal Power Engineering, 2022, 37(02): 116-121.

Wang Jianxun. Application and economic analysis of low-level energy graded hybrid heating heating technology for air-cooled units[J]. Turbine Technology, 2019, 61(05): 387-391.

Tan Kai-Bing. A study on the return on investment of BIM application[J]. Project Management Technology, 2015, (3): 122-126.

Cai Zhen. Return on capital, real interest rate and investment in China:An analysis based on industry data[J]. Financial Review . 2013,5(06) :39-58+122

Downloads

Published

19-03-2024

How to Cite

“Thermal Power Plants Hybrid Heat Supply Technology for Low-Temperature Heat Source Enhancement Economic Analysis” (2024) Transactions on Environment, Energy and Earth Sciences, 1, pp. 126–135. doi:10.62051/jmc9c212.