Typical data of vacuum collector
record VacuumSolarCollector = BuildingSystems.Technologies.SolarThermal.Data.Collectors.CollectorPartial(final IAMC = 1, final V_A = 1/1.3/980, final C_0 = 0.675, final C_1 = 2.05, final C_2 = 0.01, A = 1.0);