Added rsFEffAuxHBackup and rsFEffAuxHDefrost

Author: chipbarnaby

doc/src/records/rsys.md

@@ -822,6 +822,28 @@ Cooling cyclic degradation coefficient, valid for configurations having compress
 
 Heating efficiency factor.  At each time step, the heating efficiency is multiplied by rsFEffH.
 
+<%= member_table(
+  units: "",
+  legal_range: "*x* $>$ 0",
+  default: "1",
+  required: "No",
+  variability: "subhourly") %>
+
+**rsFEffAuxHBackup=*float***
+
+Backup auxiliary heating efficiency factor.  At each time step, the backup heating efficiency is multiplied by rsFEffAuxHBackup. Backup auxiliary heating is typically provided by electric resistance "strip heat" but may be provided by a furnace (see rsTypeAuxH).  If rsTypeAuxH is not "none", backup heat operates when air source heat pump compressor capacity is insufficient to meet heating load.  See also rsFEffAuxHDefrost.
+
+<%= member_table(
+  units: "",
+  legal_range: "*x* $>$ 0",
+  default: "1",
+  required: "No",
+  variability: "subhourly") %>
+
+**rsFEffAuxHDefrost=*float***
+
+Defrost auxiliary heating efficiency factor.  At each time step, the defrost auxiliary heating efficiency is multiplied by rsFEffAuxHDefrost.  Defrost auxiliary heating is  typically provided by electric resistance "strip heat" but may be provided by a furnace (see rsTypeAuxH).  If rsDefrostModel=REVCYCLEAUX, defrost auxiliary heat operates during air source heat pump defrost mode.  Since defrost and backup heating are generally provided by the same equipment, rsFEffAuxHDefrost and rsFEffAuxHBackup are usually set to the same value, but separate inputs are available for special cases.
+
 <%= member_table(
   units: "",
   legal_range: "*x* $>$ 0",

src/CNRECS.DEF

@@ -3705,7 +3705,9 @@ x *declare "RC rs_SetDefaultsClg();"
 *declare "int rs_Dsi( int iSR, int iHC=-1) const { if (iHC<0) iHC=rs_DsHC(); return rs_ducts[ iHC].dsi[ iSR]; }"
 
 *s FLOAT_GZ rs_fEffH;	// heating efficiency adjustment factor (applied to substep efficency), default=1
-*s FLOAT_GZ rs_fEffC;	// cooling efficiency adjustment factor (applied to substep efficency), default=1  
+*s FLOAT_GZ rs_fEffAuxHBackup;	// auxiliary heating backup mode efficiency adjustment factor (applied to substep efficency), default=1
+*s FLOAT_GZ rs_fEffAuxHDefrost;	// auxiliary heating defrost mode efficiency adjustment factor (applied to substep efficency), default=1
+*s FLOAT_GZ rs_fEffC;	// cooling efficiency adjustment factor (applied to substep efficency), default=1
 
 *s FLOAT rs_tdbOut		// outdoor dry-bulb temp at condensor or other outdoor components, F
 						//   default = from project weather data source (generally weather file)

src/cncult.cpp

@@ -1677,6 +1677,8 @@ CULT( "rsParElec",	 DAT,   RSYS_PARELEC,    0,       0, VHRLY,  TYFL,  0,      0
 CULT( "rsParFuel",	 DAT,   RSYS_PARFUEL,    0,       0, VHRLY,  TYFL,  0,      0.f,    N,   N),
 
 CULT( "rsFEffH",     DAT,   RSYS_FEFFH,      0,       0, VSUBHRLY,TYFL, 0,      1.f,    N,   N),
+CULT( "rsFEffAuxHBackup", DAT, RSYS_FEFFAUXHBACKUP, 0,0, VSUBHRLY,TYFL, 0,      1.f,    N,   N),
+CULT( "rsFEffAuxHDefrost",DAT, RSYS_FEFFAUXHDEFROST,0,0, VSUBHRLY,TYFL, 0,      1.f,    N,   N),
 CULT( "rsFEffC",     DAT,   RSYS_FEFFC,      0,       0, VSUBHRLY,TYFL, 0,      1.f,    N,   N),
 
 CULT( "rsRhIn",      DAT,   RSYS_RHINTEST,   0,       0, VHRLY,  TYFL,  0,      0.f,    N,   N),

src/cnloads.cpp

@@ -6309,8 +6309,9 @@ x				rs_inPrimary = rs_outSen / (rs_effHt * rs_PLF);
 #endif
 			}
 
-			rs_inAux = rs_outAux / rs_effAuxH;
-			rs_inDefrost = rs_outDefrost / rs_effAuxH;
+			rs_inAux = rs_outAux / (rs_effAuxH * rs_fEffAuxHBackup);
+			rs_inDefrost = rs_outDefrost / (rs_effAuxH * rs_fEffAuxHDefrost);
+
 			if (rs_pMtrAux)
 				rs_pMtrAux->H.hpBU += (rs_inAux + rs_inDefrost) * Top.tp_subhrDur;
 		}

test/ashpvc2.cse

@@ -2518,6 +2518,8 @@ ALTER RSYS "rsys1"
   rsCtrlAuxH = ALTERNATE
   rsDefrostModel = "RevCycleAux"
   rsASHPLockOutT = 37
+  rsFEffAuxHDefrost = .9
+  rsFEffAuxHBackup = .83
 FIXRPTITLES("RSYS -- Aux Alt / Def RevCycleAux / LO 37")
 
 RUN