Hi, I am simulating type 1b solar thermal collector using type 15-2 weather files.I want to calculate the useful energy of the collector for london environment.but the useful energy is in negative,why is that it should be positive.take a look of the simulation result below:I have highlighted it with the red color. waiting for the reply Time QColl +0.0000000000000000E+00 +0.0000000000000000E+00 +1.0000000000000000E+00
+0.0000000000000000E+00 +2.0000000000000000E+00 +0.0000000000000000E+00 +3.0000000000000000E+00 +0.0000000000000000E+00 +4.0000000000000000E+00 +0.0000000000000000E+00 +5.0000000000000000E+00 +0.0000000000000000E+00 +6.0000000000000000E+00 +0.0000000000000000E+00 +7.0000000000000000E+00 +0.0000000000000000E+00 +8.0000000000000000E+00 +0.0000000000000000E+00
+9.0000000000000000E+00 -2.4173684203587297E+02 +1.0000000000000000E+01 -2.5441648977456410E+02 +1.1000000000000000E+01 +4.8138101649880042E+01 +1.2000000000000000E+01 +1.6144304197108370E+03 +1.3000000000000000E+01 +3.4669850296828163E+03 |