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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

EFFECT OF MASS FLOW RATE ON DESIGN OF PRIMARY HEAT EXCHANGER

Get access (open in a dialog) pages 797-800
DOI: 10.1615/TFEC2018.env.022098

Аннотация

Research reactors for the multi-purpose neutron application have the cooling system for the cooling of the reactor core power. The research reactor modeled in this paper also incorporates the Primary Cooling System (PCS), Secondary Cooling System (SCS), and primary heat exchanger between two systems as shown in Fig. 1. The PCS removes the fission heat generated in reactor core by circulating the demineralized water through the system. The heat from the PCS is rejected to the cold water of the SCS through the primary heat exchanger. The plate-type Heat Exchanger (PHE) was used as the primary heat exchanger. The cooling tower automatically maintains the SCS inlet temperature constant by controlling the fan speed. The flow rate of SCS is adjusted to be identical with that of the PCS. To design the PHE, the inlet and outlet temperatures and the flow rates for both systems should be determined. The flow rate has the allowable band for the safe operation from the lower limit to upper limit resulting in different temperature distribution in the PHE. Specially, the PCS outlet temperature which is the core inlet temperature is used for a safety parameter for the reactor shutdown. Therefore, we need to figure out which limit for the flow rate should be used from the conservative point of view. In this paper, the effect of the mass flow rate of the PCS on the PCS outlet temperature was analytically studied in conditions of the constant core power and constant SCS inlet temperature.