Residual Heat Resources

Residual heat refers to energy that escapes as heat, which is produced by friction between moving parts of a generator, instead of being converted into electrical energy. One way in which residual heat produced by diesel generators can be recovered is in district heat systems. District heat systems are comprised of three components: diesel generator, distribution piping system, and energy transfer stations. Heat exchangers and exhaust heat recovery systems recover heat energy from the diesel generator. The distribution piping system distributes the captured heat energy to buildings connected by insulated distribution pipes. Energy transfer stations control, measure and transfer heat energy to each connected building. The use of residual heat decreases fossil fuel consumption and GHG emissions by providing heat energy to buildings that would otherwise be heated by oil transported to the site. Residual heat recovery is one type of alternative energy that is currently used by QEC in several Nunavut communities. Funding for residual heat recovery systems has been made available by various government agencies for diesel power plants in Nunavut. QEC has plans to expand existing residual heat systems and establish new residual heat systems in other Nunavut communities.

Energy Tips

Keep refrigerators and/or freezers at the recommended temperatures. Refrigerators should be kept at 1’C – 3’C, while freezers should be kept at -18’C.


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