The Application of Ground-Source Heat Pumps with Waste Water Systems

The use of waste water, both grey and black, as a heat source or sink is not a new concept. But, until recently, the availability of cost-effective, factory-constructed systems has been limited.

Now, with these new systems hitting the market, engineers have more options than ever for designing more sustainable facilities. One such way the marketplace is utilizing waste-water technology is through ground-source heat pumps.

However, many engineers may be hearing pushback when they suggest incorporating waste water into plans. Maybe you’ve heard or said it yourself: “We’ve never done this before.”

To combat the obstacle of pushback, engineers must outline the project goals to demonstrate good engineering concepts and application guidelines:

  • Understand the application of waste-water energy recovery systems for heating and cooling applications
  • Understand characteristics of unconventional water sources and their applications as the heat sink and heat source for ground-source heat pump operations
  • Recognize the capital cost requirements to effectively implement heat recovery from unconventional energy sources
  • Understand the importance of performing a thorough site investigation of the project location to assess the site limitations and unique features

Case Study: Grey Water Energy Recovery

Project Type: Retrofit of laundry area for 350-room hotel
Project Location: Alberta, Canada
Project Size: 6,000 gallons of hot water/day
Average Run Time: 10.7 hours/day
Average Output: 1.28 million BTU/day or 375 kWH/day or 1,700 gallons (50° to 140°F)
Average Performance: 4.71 COP
Peak Performance: 8.77 COP
Estimated Annual Savings: $40k/year

Laundry facility utilizing ground-source heat pumps with waste water

Learn More about Ground-Source Heat Pumps + Waste Water Systems

Steve Hamstra of Melink’s Solar & Geo team will present more on the application of ground-source heat pumps with waste water systems at the ASHRAE Conference, prior to the AHR Expo (Feb. 3-5, 2020, in Orlando, FL). If you’ll be there, we invite you to schedule a meet-and-greet with the Melink team to discuss geothermal solutions for your business.

Melink Corporation provides turnkey management of geothermal projects for architects, engineers, ESCOs, and building owners, as well as consulting services for architects and engineering firms.

Melink launches geothermal HVAC division to meet growing demand

For Immediate Release

– April 6, 2017 – Data indicates a growing demand for geothermal heating and cooling technology, and Melink Corporation responded by starting a new Melink Geo business unit.

Geothermal heating, ventilation and air conditioning (HVAC) offers building owners a more energy-efficient and environmentally friendly solution than conventional systems. Structures using geothermal HVAC typically save between 25 and 50 percent on HVAC costs, reduce their maintenance costs and water usage, and extend the life of the building’s equipment.

Additionally, as part of Melink Geo, its team of innovators have developed a patented pre-engineered geothermal pump station. The Manifest™ eliminates the need to engineer a custom pump station for each individual geothermal HVAC project, thus making geothermal more affordable and efficient.

“With 30 years of experience in the HVAC industry, providing geothermal solutions for building owners is a logical next step for Melink,” said Steve Melink, founder and CEO. “We provide turnkey management of geothermal projects for architects, engineers, ESCOs and building owners. In this capacity, we also serve as a consulting engineer for architects and engineering firms across the nation.”

A report by Transparency Market Research stated, “the global geothermal heat pumps market is forecast to reach $130.5 billion by the end of 2020, exhibiting a 13.1 percent compound annual growth rate from 2014 to 2020.”

And a survey conducted by Consulting-Specifying Engineer showed that geothermal ranks in the top five of technology demands for office building projects. According to the survey, 42 percent of engineers expect to see increasing use of geothermal HVAC for office building projects.

What is geothermal HVAC?

Geothermal is a proven, reliable and efficient technology. The U.S. Environmental Protection Agency states that a geothermal HVAC system is the most energy efficient way to heat and cool a building.

Geothermal heat pumps use the ground as a heat exchanger via a closed­-loop water circuit. During the cold winter months, the geothermal HVAC system takes heat out of the ground and transfers it into the building. And during the hot months of summer, the system removes heat from the building and transfers it back into the ground.

Since the ground maintains a constant temperature of 55­­-70°F depending on location, a geothermal HVAC system can result in considerable HVAC savings for a building owner, compared to conventional systems using air­ source condensing units for cooling and fossil fuels for heating.

To learn more or to schedule an interview with Steve Melink, please contact Marketing Manager Allison Sternad at 513.965.7300 or