MAKALE / ARTICLE Distributed resources Green Heat is the new term that addresses the applicatior of renewable energy technologies for space conditioning loads. While most people are aware of the potential fo 'green power' to displace conventional electricity generation and for 'green fuels' to displace conventiona transportation demand, there is a slow ... but growing .. appreciation of 'Green Heat' to displace conventiona heating and cooling technologies which rely on the combustion of natural gas, oil and other fuels. Bil Eggertson reports. in Canada, the federal government acknowledges four technologies to be Green Heat sources: solar thermal water heaters; solar thermal air pre-heat; advanced biomass systems (excludes lowefficiency combustion chambers); and earth energy (also referred to as geothermal or ground-coupled heat pumps, or GeoExchange). There are a number of other technologies which want to be considered under this term, such as wastewater heat recovery and some processes that are on the transition line between 'energy demand' and 'energy supply,' but the initial intent is to include any renewable energy source that can heat space, heat water or cool space. For people involved in the renewable energy sector, the environmental benefits of Green Heat are obvious. Coal and oil are used to heat relatively fewer homes and offices than they did 40 years ago, and most buildings are becoming more energy efficient to reduce their load. But the explosion in the consumption of natural gas for the single application of heating, combined with the neverending global construction, means that total emissions from the use of combustion fuels for space heating are continuing to climb. Add the growing global demand for cooling load in both residential and commercial facilities, and the potential growth in emissions from conventional energy sources used for that application becomes quite staggering. Green Heat technologies are distributed resources (DR) that are 'produced' and consumed at the same physical location. in the same concept as distributed generation for electricity, DR options avoid the need for extensive transmission or distribution facilities such as supertankers or pipelines, which have environmental concerns. Not only do the greater use of DR options eliminate potential damage to the ecosystem, they lower the physical vulnerability to system failures or terrorism attacks. The use of green power technologies in a distributed generation configuration is environmentally superior to the use of gas-fired microturbines; the use of Green Heat technologies in a distributed "Kojenerasyon: Yüksek Verim, Temiz Çevre, Enerjide Yeniden Yapılanma" ENERJi & KOJENERASYON DÜNYASI 1 61
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