Method thermalConductance

src/model/Surface.cpp:634–689

    }

    boost::optional<double> Surface_Impl::thermalConductance() const {
      OptionalConstructionBase oConstruction = construction();
      OptionalDouble result;

      if (oConstruction) {
        // from input
        OptionalDouble inputResult = oConstruction->thermalConductance(filmResistance());

        // from output
        OptionalSqlFile sqlFile = model().sqlFile();
        OptionalString constructionName = oConstruction->name();
        OptionalDouble outputResult;
        OptionalString surfaceName = name();

        // opaque exterior
        if (sqlFile && constructionName && oConstruction->isOpaque()) {
          std::string query = R"(SELECT Value from TabularDataWithStrings
                                    WHERE ReportName = 'EnvelopeSummary'
                                      AND ReportForString = 'Entire Facility'
                                      AND TableName = 'Opaque Exterior'
                                      AND ColumnName = 'U-Factor no Film'
                                      AND Units='W/m2-K'
                                      AND RowName = ?;)";
          outputResult = sqlFile->execAndReturnFirstDouble(query, to_upper_copy(*surfaceName));
        }

        // fenestration
        if (sqlFile && constructionName && oConstruction->isFenestration()) {

          // get u-factor, then subtract film coefficients
          std::string query = R"(SELECT Value from TabularDataWithStrings
                                    WHERE ReportName = 'EnvelopeSummary'
                                      AND ReportForString = 'Entire Facility'
                                      AND TableName = 'Exterior Fenestration'
                                      AND ColumnName = 'Glass U-Factor'
                                      AND Units='W/m2-K'
                                      AND RowName = ?;)";
          outputResult = sqlFile->execAndReturnFirstDouble(query, to_upper_copy(*surfaceName));

          if (outputResult) {
            outputResult = 1.0 / (1.0 / (*outputResult) - filmResistance());
          }
        }

        if (inputResult) {
          result = inputResult;
          if (outputResult) {
            compareInputAndOutput(*oConstruction, "thermal conductance", *inputResult, *outputResult, 1.0E-5);
          }
        } else {
          result = outputResult;
        }
      }

      return result;
    }

    bool Surface_Impl::setUFactor(double value) {