Feasibility study of buildings heating by sun and wind energy

Abstract

In Lithuania about 1/3 of fuel energy consumption is dedicated for households. Therefore there is a big potential to reduce the consumption of fossil imported fuel and carbon dioxide emission to atmosphere. It is reasonable to investigate heating supply for buildings, using a complete set of wind and direct sun energy. The analytical investigation were carried out. Analysis was made on 1988, 1991 and 2002 for the case, when for one m² of heated premises, there is dedicated 0,25 m² of sun collectors' area and 0,5 m² of rotor swept area of wind turbine. In this case, during heating season, hybrid system satisfies from 42,6 to 56,2% of heating demand for premisses heating and hot water. However, while not using long-term heat storage, 47,3% of annual thermal energy potential, possible to generate, remains unused. For more effective use of energy potential, it is possible to use residual thermal energy for other porposes.