Contents

Compressor4_CL



Compressor4_CL is a model of a scroll compressor used for refrigeration and air conditioning applications.  The model is developed in terms of a leakage coefficient (L) to determine the volumetric efficiency and a overall efficiency used to determine the input power.  If one or both of these parameters are set to a negative values, default correlations are applied based on experimental data from:

Shrestha, S., Mahderekal, I, Sharma, V., and Abdelaziz, O.
Test Report #11
Compressor Calorimeter Test of  R-410A Alternatives R-32, DR-5,  and L-41a 
Oak Ridge National Laboratory, April 5, 2013

and
 
Shrestha, S., Sharma, V., and Abdelaziz, O.
Test Report #33
Compressor Calorimeter Test of  R-410A Alternative: R-32/R-134a Mixture Using a Scroll Compressor 
Oak Ridge National Laboratory, Feb. 18, 2014


Inputs:
F$:  refrigerant
DR:  displacement rate  (m^3/s, ft^3/hr)
T_evap:  evaporating temperature (C, K, F, R)
DELTAT_sh: degrees of superheat at compressor inlet (DELTAK, DELTATF)
T_cond:  condensing temperature  (C, K, F, R)
L:  leakage fraction  (enter a value <0 to use default correlation)
eta:  combined isentropic efficiency of the compressor and electrical efficiency of the motor (enter value <0) for default correlation

Outputs:
eta_vol:  volumetric efficiency
m_dot:   mass flow rate of refrigerant (kg/s, lbm/hr)
W_dot:   compressor power (W)
h_out:  specific enthalpy at compressor exit

Example: 

$UnitSystem Eng F psia mass
F$='R32'
DR=150.69 [ft^3/hr]
T_cond=120 [F]
T_evap=40 [F]
DELTAT_sh=40 [DELTAF]
L=-1  {use default correlation}
eta=-1 {use default correlation}
CALL Compressor4_CL(F$, DR, T_evap, DELTAT_sh, T_cond,  L, eta: eta_vol, m_dot, W_dot, h_out)

{Solution:
eta_vol=0.8359 [-]
h_out=271.7 [Btu/lbm]
m_dot=174.7 [lbm/hr]
W_dot=1982 [W]
}

Index