CSE 0.836

ACM heat pump autosize

Author: chipbarnaby

src/CNLOADS.CPP

@@ -1892,19 +1892,38 @@ void RSYS::rs_AuszFinal()		// called at end of successful autosize (after all xx
 
 	if (rs_IsASHP())
 	{
+#if 1
+		if (rs_isAuszC)
+		{	if (IsAusz( RSYS_CAP47))
+			{	// both autosized
+				float cap47min = 0.75f * rs_cap47;
+				float cap95x = rs_Cap95FromCap47ASHP( cap47min);
+				if (rs_cap95 > cap95x)
+				{	// cooling dominated
+					// rs_cap95: per autosize
+					rs_cap47 = rs_Cap47FromCap95ASHP( rs_cap95);
+				}
+				else
+				{	// heating dominated
+					rs_cap95 = cap95x;
+					rs_cap47 = cap47min;
+				}
+			}
+			// else leave rs_cap95 autosized, rs_cap47 as input
+		}
+#else
 		if (rs_isAuszC)
 		{	// ASHP cooling autosized
 			//  force cap95 to be consistent with cap47
 			float cap47x = rs_Cap47FromCap95ASHP( rs_cap95);
-#if 0
 			if (cap47x <= rs_cap47)
 				rs_cap95 = rs_Cap95FromCap47ASHP( rs_cap47);
 			else
-#endif
 			if (IsAusz( RSYS_CAP47))
 				rs_cap47 = cap47x;	// both cap47 and cap95 autosized
 									//   force cap47 to be consistent with cap95
 		}
+#endif
 		rs_SetupASHP();		// default other params as needed
 		rsi->rs_cap47 = rs_cap47;	// copy back to input record
 

src/csevrsn.h

@@ -14,14 +14,16 @@
 // version # for current build
 // change ONLY here
 #define CSEVRSN_MAJOR 0
-#define CSEVRSN_MINOR 835
+#define CSEVRSN_MINOR 836
 
 // version # as quoted text ("x.xxx")
 #define CSEVRSN_TEXT MAKE_LIT(CSEVRSN_MAJOR##.##CSEVRSN_MINOR)
 
 // ONLY comments below here
 
 /* History:
+   0.836: heat pump autosize: now uses ACM algorithm when both cap47 and cap95 autosized
+          committed 7-20-2017
    0.835: heat pump autosize: don't force cap95 to be consistent with cap47
           committed 7-19-2017
    0.834: UEF model 2nd rev (cooldown-time-dependent startup energy, load carry-forward)