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Waste Heat Recovery -Energy Recovery Heat Exchanger

By Paul Subscribe to RSS | April 17th 2012 | Views:

Waste heat recovery is something that can greatly benefit companies and industrial businesses that use a lot of heat and energy to produce their goods. This article will give you information about waste heat recovery systems.

You may like to investigate applying a heat recovery system to your own business, to save money and to save energy! Waste heat is heat, which is generated in a process by way of fuel combustion or chemical reaction, and then “dumped” into the environment even though it could still be reused for some useful and economic purpose. The essential quality of heat is not the amount but rather its “value”. The strategy of how to recover this heat depends in part on the temperature of the waste heat gases and the economics involved.

First, let’s look at a basic understanding of what a heat recovery system is. It is also sometimes called a waste head recovery unit, abbreviated as WHRU. What happens is that this unit, or machine, will take in heat energy from production, often from steam. That steam has high energy content, but often is just let into the atmosphere as waste, dissipating and losing its energy concentration. The machine instead will collect that energy and process it, holding onto it so that it can be transferred to other parts of your operations and be put to use.

You may find heat recovery systems gathering heat and energy from hot flue gases that come out of diesel generators, for example. You also will find relevancy for these machines when your business produces a lot of steam from cooling towers, or waste water from cooling processes where the water is used to cool down different things, but then is expelled and wasted. Large quantity of hot flue gases is generated from Boilers, Kilns, Ovens and Furnaces. If some of this waste heat could be recovered, a considerable amount of primary fuel could be saved. The energy lost in waste gases cannot be fully recovered. A number of toxic combustible wastes such as carbon monoxide gas, sour gas, carbon black off gases, oil sludge, Acrylonitrile and other plastic chemicals etc, releasing to atmosphere if/when burnt in the incinerators serves dual purpose i.e. recovers heat and reduces the environmental pollution levels. Reduction in equipment sizes gives additional benefits in the form of reduction in auxiliary energy consumption like electricity for fans, pumps etc.

The manner in which the waste heat recovery system actually converts the energy it collects into usable forms of energy is something more detailed and scientific, probably more appropriately described in a separate article. With the energy you save from being wasted, you can connect the parts of your industry into a more seamless, closed circuit system that is self-sufficient for the most part. The production of something in one part feeds the waste heat recovery system, which does its job and sends the energy to another part of the process, which then produces more waste energy, and the cycle continues. Of course there will be some initial energy input to get things going, and sometimes you’ll have to add more, but for the most part, you will have greatly improved your capacity to create products with less energy input.

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