6. Il APPENDIX VI.I THE RANKINE HEAT PUMP CYCLE VI.I.l: LIST OF SYMBOLS AND CONSTANTS p 2 ;p 1 upper and lower pressures in ideal Rankine cycle pevap p output rad p thermal pheat into pump p comploss p. inputsunlight temperatures of refrigerant at numbered stages in Rankine cycle pressure in evaporator pressure in e~ternal radiator power output to space by radiation from external radiator electrical power to run heat pump power taken from hull by the heat pump (in the form of heat only) efficiency of actual compressor power released as heat due to compressor inefficiency mass flow of refrigerant through heat pump and external radiator enthalpy of refrigerant at numbered stages entropy of refrigerant at numbered stages power input as sunlight for agriculture
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