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Published On: Sat, Dec 15th, 2018

The 5 Types of Heat Recovery Systems: An Introduction

At its core, all heat recovery systems serve the function of removing stale air from inside the building and replacing it with fresh and warm air from the outside, but how they function does differ quite a bit. Based on that, the following will serve as an introduction to some of the primary types of heat recovery systems.

Thermal Wheel Heat Recovery

Consisting of two huge wheels and a honeycomb array, the thermal wheel heat recovery system is considered to be the most efficient ventilation system of them all, with an air recovery efficiency of up to 80%. Each of the two wheels rotates in opposite direction to the other, while the system transfers the heat from the stale inside air onto the fresh outside air during the exchange. Depending on the model of the heat recovery system, the heat exchangers could either be made out of aluminium, plastic or even paper at times. A good product should allow the user to regulate the wheel speeds and the rate of heat exchange to affect the inside temperature, as required.

Plate Heat

Smaller and efficient heat recovery systems that are suitable for smaller operations often use plate heat technology for ventilating. There are no wheels here but the box consists of parallel metal/plastic plates that facilitate the heat exchange between inside air and outside air. Expect an air recovery efficiency of 70% roughly with the HRVs which employ plate heat technology.

photo Gerd Altmann via pixabay

Heat Pump

Heat pumps function pretty much in the same way as the name suggests – they pump and transfer heat from one place to the other but depending on whether they are drawing the heat from the outside air or from under the ground, the setup and the costs will differ vastly.

Heat Pipe

Heat pipes are quite popular due to their low maintenance expenses and depending on whether the particular HRS is using a horizontal or a vertical array, the efficiency rate can vary in between just 50% for horizontal arrays to as much as 75% for the vertical arrays. The pipes actually use a refrigerant to collect and transfer heat from in between the exhaust and the source.

photo/ ClkerFreeVectorImages via Pixabay.com

Closed Loop

Also described as a run around coil, water charged closed loop heat recovery systems are complex, as well as offering just 50% air recovery efficiency. These are only used when the inside and outside air streams are so far apart that installing other more efficient systems such as the thermal wheel is not feasible. Consider the following steps to understand how the technology works.

  • A circuit of pumped pipes connect the two circuits
  • Water picks up the heat from the exhaust pipe and then passes it onto the supply coil

This is, of course, just an introduction and there is still a still lot more to learn before you are able to choose the right one and you can find that info on https://www.bpcventilation.com/choosing-a-mvhr-unit.

Learn everything that there is to learn about heat recovery systems, as this will guide you towards a product that’s right for the size and nature of the project in question.

About the Author

- Veselina Dzhingarova has long experience in internet marketing and SEO. She is passionate about blogging to share her expertise. Veselina is a regular contributor at many other online publishers like chamberofcommerce.com, marketoracle.co.uk, newswire.net, bizcommunity.com, socialnomics.net and more. She is the co-founder of Financia­ltipsor.co­m, cryptoe­xt.com, Bl­ogforweb.c­om, Techsu­rprise.com­, travelti­psor.com a­nd others.­ You can get in touch with her on LinkedIn , Google+ or at [email protected]

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