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Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors

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Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors ( advanced-nuclear-power-technology-program-supercritical-carb )

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The subroutine guesses the cooling water mass flow rate and starting from the cold end of the pre-cooler, i.e. in reverse to the methodology described in Section 3.3.3, and calculates the hot end conditions. If the difference between the calculated hot side enthalpy at the hot end is lower than the user specified tolerance the subroutine returns the calculated values. Otherwise, the cooling water mass flow rate is adjusted until the hot end hot fluid enthalpy is matched within the specified tolerance. The same subroutine is used for evaluating the performance of inter-coolers. The input file names that contain the geometry are specified in the variable hxtype. 3.4 Subroutine RECUP Subroutine RECUP evaluates the performance of a recuperator. It is an interface between the cycle routines such as SIMPCYC or RECOMP and the heat exchanger routines such as PCHEvol or PCHElen. There are basically three different approaches to the evaluation of the recuperator performance: 1. The recuperator effectiveness and pressure drops are specified. 2. The effectiveness and the heat exchanger face dimensions are specified and the pressure drops and heat exchanger length volume are calculated. 3. The heat exchanger volume is specified and the recuperator effectiveness and pressure drops are evaluated. In order to apply the subroutine RECUP the inlet recuperator conditions must be known. In the first case, which can be used for preliminary calculations, the effectiveness and pressure drops are known, therefore the recuperator performance can be easily estimated from: 60

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