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SOLANES, Fernando; Verstraete, Juan; Vilapriñó, Rodolfo. General economic energy model In buildings (Gemb). In:CONFERENCE ON PASSIVE AND LOW ENERGY ARCHITECTURE, 20., 2003, Santiago. Anais... Santiago: PLEA, 2003. p. 1 - 4.
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Resumo

  The main objective was to develop through a reliable and flexible method that studies the conservation and passive use of solar energy and the economic convenience of the additional investment required. We started with a prediction model of the Solar Saving Fraction for Direct Gain systems. It has been developed from easy available information for most sites and cases; like comfort temperature, average climatic data and its occurrence distribution, solar caption conditions, heat losses coefficients, thermal admittance and geometrical distribution of the construction elements. These variables define the indoor response function to cyclical outdoors weather conditions and the energy required to achieve comfort. To verify the GEMB model the results were compared, for the same input conditions, with those obtained from the 9 Direct Gain Systems defined by Los Alamos Scientific Laboratory (LASL), with a correlation coefficient superior to 98%. The main difference between models is the flexibility to predict the Solar Saving Fraction (SSF): the 9 DG LASL correlation’s were defined in each case for fixed materials (concrete), thickness and geometrical relationships; the GEMB model can be applied for any material, thickness and geometrical relationships. Using the output of the physical part of the model, and taking the additional investment required as well as the savings in energy spending over time into account the net actual value is obtained.
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