Most energy recovery systems run exhaust air / water through a heat exchanger and use the heat to preheat the incoming air / water. Typically 15% to 30% of the energy can be recovered. However, if a NRT Heat Pump system is used, it can recover up to 100% of the energy (minus the energy to run the heat pump) and heat the incoming air / water to a higher temperature than the exhaust, something that is impossible to do with conventional heat recovery systems.
During 33 Years of building Heat Pump systems, we have built a unique combination of experience and capabilities to come up with the right system for a wide variety of large and difficult energy recovery questions.
Some examples:
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Beverage manufacturer: A hot fill process that heats liquid to 215°F (102°C), pasteurizing the beverage during the filling process, then rapidly cooling the filled bottles to 70°F (21°C). Our system would recover the heat as part of the cooling process and pump it up to the 215°F pasteurization level. By recycling the heat, the total process energy requirement is reduced by approximately 70%. The system’s pay back period is between 2 and 4.5 years, depending on gas prices. Our unique capability is to be able to reach the required 215°F efficiently.
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Sewage treatment plant: Use waste water as a geothermal source to heat or cool offices. The Heat Pump system extracts the heat from the waste water and uses it to heat offices in the winter. In summer, the process is reversed to provide air conditioning. The system is priced similarly to a heating and A/C system but is much less expensive to run. And in keeping with our ability to be responsive to customer needs, for these projects we provide heat exchangers that can be cleaned.
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Pharmaceutical company: Uses boilers to create steam. Once the steam is used, the condensed water can be cooled and the wasted heat recovered and used before it is recycled to the boiler. Our Heat Pump system will be used for this cooling process, using the captured heat to boil a thermal fluid and generate “free” electricity. Pay-back is 4 - 5 years. Our unique capability: We are the only provider to work at this temperature range.
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Paper Mill: Hot humid air from the machines condenses on the roof, causing water to drip on paper products and the roof to rot. The mill currently runs a roof heating system. Our Heat Pump system recovers heat and moisture from the machines and recycles it as dry, hot air to heat the building. Payback period is 4 years. Our unique capabilities: Size of system and the effectiveness of drying the air.
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Our Heat Pumps systems with their wide range of efficient operating temperatures and cleanable heat exchangers are uniquely capable to extract waste heat from many sources and then recycle this energy to heat water, air or generate electricity. We also have the know-how and flexibility to build large scale systems. All systems are made to specifications. Please contact us to discuss your needs. We have the unique experience and capabilities to come up with the right answer for your applications.
