{"id":18525,"date":"2019-11-19T02:54:38","date_gmt":"2019-11-19T02:54:38","guid":{"rendered":"https:\/\/northmoregordon.com\/?p=18525"},"modified":"2024-02-05T02:38:35","modified_gmt":"2024-02-05T02:38:35","slug":"benefiting-from-waste-heat-recovery","status":"publish","type":"post","link":"https:\/\/northmoregordon.com\/articles\/benefiting-from-waste-heat-recovery\/","title":{"rendered":"Benefiting from waste heat recovery"},"content":{"rendered":"\t\t
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\u00a0<\/p>

Do you have waste heat and don\u2019t know what to do with it?<\/p>

Energy costs are hurting business. Yet often there are concentrated sources of energy going to waste in manufacturing environments. Recovering waste heat back into processes can save substantial amounts of energy cost, and increase the spare heating capacity of existing systems.<\/p>

Data matters<\/strong><\/p>

Doing heat recovery well requires good data and a good understanding of the existing systems, combined with a methodical approach to determining the optimum solution. Especially where there are multiple heat sources and heat sinks.<\/p>

A Pinch Analysis is the gold standard for optimising heat recovery in your plant, but discrete feasibility studies are also very useful.<\/p>

How can waste heat be recovered and used?<\/strong><\/p>

Waste heat can be available from a range of sources, including exhaust air from gas burners, de-superheating a refrigerant prior to latent heat rejection, oil coolant systems on air compressor and refrigeration compressors, wastewater discharge, furnace exhaust, refrigeration condensers, and many other sources.<\/p>

Direct heat exchange using a tube or plate heat exchanger is a simple method for heat recovery, however, there are other methods. For example, a waste heat source at a relatively low temperature can be used to heat a process flow to a higher temperature using a heat pump. Indirect heat exchange can be achieved using a hot oil circuit where the heat source is too hot for direct heat exchange with the heat sink.<\/p>

Waste heat can also be used in many ways:<\/p>