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:
$Load Component Library
$UnitSystem Eng F psia mass
$Varinfo h_out units=Btu/lb_m
$VarInfo m_dot units=lb_m/hr
$VarInfo W_dot units=W
F$='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]
}