Modelling heat transfer in very high temperature gas cooled reactor

Suneet Singh, Rizwan-Uddin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Very High Temperature Reactor (VHTR) is one of the six reactor concepts selected for further consideration by Generation IV International Forum (GIF) members. Adequate heat removal under steady-state and transient condition is important for the safe operation of VHTR. In one of the proposed designs for reactor cavity cooling system, under off normal conditions, coolant comes down through a downcomer and is then distributed into riser channels. The purpose of this design is to enhance heat transfer rates. The heat transfer characteristics in such a cavity are modeled by natural convection in a square cavity with plate. The plate divides the cavity into channels. The cavity is open at the top and the left side wall is isothermal. The plate is parallel to the side walls. The plate is isothermal and is maintained at a lower temperature than the left wall. The plate is shorter than the height of the cavity so that flow down in one channel turns up in the next channel. The right wall has a temperature lower than the plate, and bottom of the cavity is adiabatic. The flow in the cavity is simulated by recently developed Modified Nodal Integral Method (MNIM). Simulations are done for two different heights of the plate. The cavity without plate is also studied for comparison purposes. The numerical investigation is done for Rayleigh numbers of 103, 104 and 105. Nusselt numbers at hot wall and volumetric flow rate into the cavity are reported for all nine cases. Results show that there is significant enhancement in heat transfer in the presence of a plate for higher Rayleigh numbers.

Original languageEnglish (US)
Title of host publicationFourteenth International Conference on Nuclear Engineering 2006, ICONE 14
Volume2006
DOIs
StatePublished - 2006
EventFourteenth International Conference on Nuclear Engineering 2006, ICONE 14 - Miami, FL, United States

Other

OtherFourteenth International Conference on Nuclear Engineering 2006, ICONE 14
CountryUnited States
CityMiami, FL
Period7/17/067/20/06

Fingerprint

Heat transfer
High temperature gas reactors
Temperature
Nusselt number
Cooling systems
Natural convection
Coolants
Flow rate
Removal

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

Cite this

Singh, S., & Rizwan-Uddin (2006). Modelling heat transfer in very high temperature gas cooled reactor. In Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14 (Vol. 2006). DOI: 10.1115/ICONE14-89655

Modelling heat transfer in very high temperature gas cooled reactor. / Singh, Suneet; Rizwan-Uddin.

Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14. Vol. 2006 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Singh, S & Rizwan-Uddin 2006, Modelling heat transfer in very high temperature gas cooled reactor. in Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14. vol. 2006, Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14, Miami, FL, United States, 17-20 July. DOI: 10.1115/ICONE14-89655
Singh S, Rizwan-Uddin. Modelling heat transfer in very high temperature gas cooled reactor. In Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14. Vol. 2006. 2006. Available from, DOI: 10.1115/ICONE14-89655

Singh, Suneet; Rizwan-Uddin / Modelling heat transfer in very high temperature gas cooled reactor.

Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14. Vol. 2006 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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