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Erschienen in:
2020 | OriginalPaper | Buchkapitel
The Influence of Interfacial Thermal Contact Resistance on Cooling Performance of the Large Inertia Wall in Nuclear Power Plant
verfasst von : Xiaoyan Wu, Xu Zhang
Erschienen in: Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019)
Verlag: Springer Singapore
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Abstract
The cooling performance of the heat sink wall within a limited time is a main factor to ensure the thermal environment of the main control room (MCR) under accident conditions in CAP series nuclear power plant. To analyze the effects of thermal contact resistance (TCR) on the cooling performance, we propose a three-dimensional unsteady heat transfer model, which couples the resistance–capacity (RC) method and finite difference method and is validated by experiments. The results show that compared to the ones that ignored TCR, when the value is 10−4, 10−3 and 10−2 m2 °C W−1, the cooling capacity is reduced by 1%, 1.7% and 4%, respectively. Furthermore, the maximum cooling release rate is reduced by 5.46, 5.93 and 11.42% with the time lag 8 min, 9 min and 21 min, respectively. Therefore, the reliability of the safety performance of the MCR under accident conditions can be overestimated if the TCR is not considered.