Abstract

ln this paper the potential for energy conservation in space and water heating for three types of district-heated buildings in south-west Sweden is analyzed. The energy savings for different conservation measures are estimated using a computer program which calculates daily building energy balances. The value of energy savings is estimated as the product of energy savings and the resulting avoided costs for district-heat production, summed over all periods with different costs. The cost differences among the several energy-conservation measures compared and the resulting avoided costs are low. Small changes in the assumptions could change results. Comparing costs between single conservation measures and the supply of district heat on a short term basis is insufficient. An extended analysis is needed to evaluate the effects on the total district-heat demand resulting from energy conservation and the come&ion of additional buildings to the system. Such an analysis indicates how energy conservation could reduce future investment needs in a district-heating system. The energy-conservation potential in analyzed buildings lies between 30 and 60% of final energy use when both avoided marginal operating costs and capital costs for peak-load and reserve boilers in district-heat production are considered together with an coordination of long-term planned building maintenance with energy-conservation measures.

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Panels of

Panel 2. Commercial Technologies and Buildings

Panel 1. Policy, Programs and Program Evaluation

Panel 4. The Energy-Environment Link

Panel 3. Human Dimensions of Energy-Use and Conservation

Panel 5. Transport