* This is in fact the MW temperature for all room radiators when there are no setbacks. + * This works for stiff and soft regulation cases therefore. * * @param radWnsb pre-setback radiator output based on variable external air temperature (W) * @return (radAnsbMW) radiator mean water temperature in each A room when B is NOT set back (C) @@ -554,9 +555,12 @@ public static DemandWithoutAndWithSetback computeDetachedDemandW(final ModelPara * Note: this does not allow for the temperature delta across the radiator rising, * and thus the mean water (MW) temperature dropping further from the flow temperature, * as more heat is drawn by an A room below 'normal' temperature. + *
+ * This shows the change in heat and electrical demand from a house with no rooms set back + * to when B rooms are set back. * * @param params the variable model parameters - * @param bungalow if true, compute as 4-room bungalow, else as 8-room detached + * @param bungalow if true, compute as 4-room bungalow, else as 2-storey 8-room detached * @param equilibriumTemperature if not null and not zero length, * used to return the A-room equilibrium temperature * @return demand in watts, finite and non-negative @@ -599,11 +603,12 @@ public static DemandWithoutAndWithSetback computeSoftATempDemandW(final ModelPar // MW temperature for all room radiators with no setbacks. final double DradAMWnsb = nsbAMW(DradWnsb); //System.out.println(String.format("DradAnsbMW = %.1f", DradAnsbMW)); - // Delta between radiator mean water (MW) and A room air. - final double DradAdTsb = DradAMWnsb - HGTRVHPMModel.NORMAL_ROOM_TEMPERATURE_C; + // Delta between radiator mean water (MW) and A room air with no setbacks. + final double DradAdTnsb = DradAMWnsb - HGTRVHPMModel.NORMAL_ROOM_TEMPERATURE_C; //System.out.println(String.format("DradAdTsb = %.1fK", DradAdTsb)); - final double CoPCorrectionK = params.correctCoPForFlowVsMW ? flowMWDelta_K : 0; + // Compute correction for across-radiator delta-T if needed. + final double CoPCorrectionK = params.correctCoPForFlowVsMW() ? flowMWDelta_K : 0; // HPinWnsb: (Heat Pump Efficiency) heat-pump electrical power in when B not setback (W). // (HEAT_PUMP_POWER_IN_NO_SETBACK_W) @@ -669,11 +674,11 @@ public static DemandWithoutAndWithSetback computeSoftATempDemandW(final ModelPar // // Delta between radiator mean water (MW) and A room air. final double VradAdTsb = DradAMWnsb - tempA; - assert((VradAdTsb > DradAdTsb) || (tempA >= HGTRVHPMModel.NORMAL_ROOM_TEMPERATURE_C)) : + assert((VradAdTsb > DradAdTnsb) || (tempA >= HGTRVHPMModel.NORMAL_ROOM_TEMPERATURE_C)) : "When room is cooler than 'normal', delta must be higher."; //System.out.println(String.format(" VradAdTsb = %.1fK", VradAdT)); // Ratio to original non-setback delta. - final double VradAdTmultsb = VradAdTsb / DradAdTsb; + final double VradAdTmultsb = VradAdTsb / DradAdTnsb; //System.out.println(String.format(" VradAdTmultsb = %.2f", VradAdTmultsb)); final double dtToWexp = 1 / HGTRVHPMModel.RADIATOR_EXP_POWER_TO_DT; // Power output from rad in A room. @@ -693,9 +698,12 @@ public static DemandWithoutAndWithSetback computeSoftATempDemandW(final ModelPar VradWAsb - VAHLW; //System.out.println(String.format(" VAHLerrW = %.1fW", VAHLerrW)); - // Stop when A-room gains exceed losses, + // Stop when A-room losses exceed gains // thus returning (conservative, near) equilibrium values // from the previous step. + // + // As the A room trial temperature rises with each loop iteration, + // losses will rise. if(VAHLerrW < 0) { break; }