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h_3.7=Enthalpy(R410A,P=P_cond,x=0) h_4=Enthalpy(R410A,T=T_4,P=P_cond) s_2=Entropy(R410A,T=T_2,h=h_2) h_3_is=Enthalpy(R410A,s=s_2,P=P_cond) eta_is=(h_3_is-h_2)/(h_3-h_2) "Temperature differences for the calculation of LMTDs for the UAs of the evaporator and condenser in single and two phase condition" delta_T_brine_evap= T_brine_0.5-T_brine_out {T brine 0.5 is the temperature of the brine on the saturated vapour line, dividing evaporation and superheating of the refrigerant corresponding to T1.5, Tbrine out is the outlet temp of brine corresponding to T1} delta_T_brine=T_brine_in-T_brine_out {Total Temperature difference over the evaporater on the brine side} delta_T_water_des=T_water_out-T_water_0.35 {T water 0.35 is the temperature of the water on the saturated vapour line, corresponding to T3.35, T water out is the outlet temperature of the water, corresponding to T3} delta_T_water_cond=T_water_0.35-T_water_0.7 on the saturated liquid line, corresponding to T3.7} {delta_T_water_sub=T_water_0.7-T_water_in} water, corresponding to T4} delta_T_water=T_water_out-T_water_in condenser on the water side} P_cond=Pressure(R410A,T=T_cond,x=1) cycle} P_evap=Pressure(R410A,T=T_evap,x=0) cycle} P_ratio=P_cond/P_evap omega_comp = (3000/60) V_dot_swept= 0.001925 Copeland select online, 6.93 m^3/h, 50 Hz which is 3000 rpm} "Cycle components:" {----------------------------------------------------------------------------------------------------------} "Evaporator" UA_sup=22.24649-253.989*k_1.5-298.449*k_2-1511947*mu_1.5-284923*mu_2-2.23844*Rho_1.5- 0.45872*Rho_2+0.109339*P_evap UA_evap=323.0086+19158.80422*k_1.5-49773038.92*mu_1.5+88.612*m_dot_ref+ 0.479561316*T_evap {T water 0.7 is the temperature of the water {T water in is the inlet temperature of the {Total Temperature difference over the {pressure on the high pressure side of the {pressure on the low pressure side of the {pressure ratio} {speed of the compressor is fixed} {m^3/s , as calculated from compressor data sheet from -iv-PDF Image | Next generation of refrigerants for residential heat pump systems
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