Efficiency analysis of combined biomass and solar energy in Lithuania

In this paper were performed analyses of the renewable energy impact on reduction of the greenhouse gas (GHG) emissions. The pilot integrated biomass and solar water heating system at public institutions of Lithuania were analyzed. Purpose of this analysis was to evaluate systems′ efficiency of performance. It has been executed for measurements of produced energy, consumed water, and burned biofuel in summer and winter time. Analysis showed that heat load for domestic hot water is too low for biomass boiler for summer season. That problem could be improved with optimizing solar heating system. Modernization of this system could significantly reduce energy costs and emissions of carbon dioxide and demonstrate an integrated solution with bio and solar energies utilization in this system. Investigation shows that Lithuania can reduce GHG emission to 8 % in the period 2008–2012 by increasing use of biomass, solar, and others renewables and achieve the requirement of the Kyoto protocol.