Experimental Study on the Effect of Heat-Retaining and Diversion Facilities on Thermal Discharge from a Power Plant

Abstract

In order to reduce the influence of thermal discharge from the power plant on the surrounding water environment and the operation efficiency of the power plant, a distorted physical model was presented and applied to Huadian Kemen Power Plant for studying heat transport and analyzing the effects of heat-retaining and diversion facilities near the intake/outlet on the thermal discharge for six scenarios. Field investigations were also used to validate the model. This study is unique as it is the first to elaborate on the impact of heat-retaining and diversion facilities on thermal discharge. The results indicate that the construction of heat-retaining and diversion facilities can decrease the excess temperature at intake to meet the intake requirement and improve the distribution of low temperature rise, but the area of high temperature rise has an increase. When the heat-retaining wall and diversion dike were constructed, the maximum intake temperature rise of Phase III decreased significantly by 1.0–1.3 °C with an average decrease of 0.2 °C, and the maximum value of Phase I and II was reduced by 0.3 °C with little mean change. A comparative experiment with different construction heights was also conducted. Result analysis shows that when the crest elevation was reduced from 3 to 2 m, the influence on the intake temperature rise of Phase I and II could be ignored, and the average temperature rise of Phase III only had an increase of 0.1 °C, suggesting that constructions with 2 m play an effective role in reducing heat return to the intake.

The effect of intake channel length on water temperature at the intake point of the power plant at Muara Karang power plant

“…Hao et al also studied at the Huadian Ministry of Power Plant to explore the impact of heated water retaining designs. The study showed that the walls and barriers reduced the maximum temperature at the intake point by 1.0 to 1.3 o C, with an average decrease of 0.2 o C. Another study showed that constructing a hot water retaining structure could reduce seawater temperature at power plant intake by 1.12 to 1.24% (Hao et al, 2020). The results suggested that adding intake channel in the 250 to 957m range was less effective compared to other heat-retaining structural designs.…”

Realistic Energy, Exergy, and Exergoeconomic (3E) Characterization of a Steam Power Plant: Multi-Criteria Optimization Case Study of Mashhad Tous Power Plant

“…The environmental analysis shows that burning solid waste curbed carbon emissions by about 1 MMT for Dhaka and 0.5 MMT for Chattogram. Hao et al [24] conducted an energy and exergy analysis, along with an economic exergy analysis, of Huadian Kemen Power Plant based on its operational efficiency and its impact on the discharged heat to the surrounding environment. Their findings indicated that the construction of heat-retaining and -diversion facilities within the power plant reduced the intake water temperature and improved heat distribution, although regions with higher temperatures also experienced an increase.…”