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VDI 4640 Sheet 2 Thermal use of the underground - Ground source heat pump systems Verband Deutscher Ingenieure / Association of German Engineers / 01-Sep-2001 / 43 pages
VDI 4640 Sheet 3 Utilization of the subsurface for thermal purposes - Underground thermal energy storage Verband Deutscher Ingenieure / Association of German Engineers / 01-Jun-2001 / 42 pages
VDI 4640 Sheet 4 Thermal use of the underground - Direct uses Verband Deutscher Ingenieure / Association of German Engineers / 01-Sep-2004 / 40 pages
VDI 4650 Sheet 1 Calculation of heat pumps - Simplified method for the calculation of the seasonal performance factor of heat pumps - Electric heat pumps for space heating and domestic hot water Verband Deutscher Ingenieure / Association of German Engineers / 01-Mar-2009...
VDI 4650 Sheet 2 - DRAFT Draft Document - Simplified method for the calculation of the annual coefficient of performance and the annual utilisation ratio of sorption heat pumps - Gas heat pumps for space heating and domestic hot water Verband Deutscher Ingenieure / Association of German...
VDI 4655 Reference load profiles of single-family and multi-family houses for the use of CHP systems Verband Deutscher Ingenieure / Association of German Engineers / 01-May-2008 / 40 pages
VDI 4660 Sheet 1 Conversion factor for specific emissions from energy conversion systems Verband Deutscher Ingenieure / Association of German Engineers / 01-Apr-2000 / 38 pages
VDI 4660 Sheet 2 Calculation of emissions related to target energy for energy conversion Verband Deutscher Ingenieure / Association of German Engineers / 01-May-2003 / 21 pages
VDI 4661 Energetic characteristics - Definitions, terms, methodology Verband Deutscher Ingenieure / Association of German Engineers / 01-Sep-2003 / 52 pages
VDI 4670 Sheet 1 Thermodynamic properties of humid air and combustion gases Verband Deutscher Ingenieure / Association of German Engineers / 01-Feb-2003 / 32 pages
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