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Commercial Geothermal Heat Pump: Perfect for Apartment Buildings

By Nordic

March 01, 2016

Commercial Geothermal Projects

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While most of the recent commercial geothermal heat pump projects we’ve shared on this blog have been commercial in nature, geothermal heat pumps are also an excellent choice for multi-unit residential buildings, including condos and apartment buildings.

This apartment building in Amherst, Nova Scotia was a new build. The owner of this project wanted a high-end apartment building that would attract quality tenants. To this end he chose to outfit his building with balconies, an elevator, a common room, gym, radiant in-floor heating systems, five appliances in each unit and 24-hour security.

The owner also chose to incorporate green features into the building’s design. The most prominent of these green features being the high-efficiency commercial geothermal heat pumps for the building’s heating system.

Multi-Unit Residential Heating with Commercial Geothermal Heat Pumps

This commercial geothermal heating system is an open loop system with non-reversing W-150 geothermal heat pumps connected in parallel to a single hot buffer tank on the indoor side. Each heat pump has a dedicated circulator pump for the indoor side to provide flow to the hot buffer tank. The outdoor side of the heat pumps are tied together in parallel and water flow is provided by a variable speed pump. Each heat pump has a flow control valve to start and stop flow with unit operation. System operation is managed by a Tekmar controller which provides staging as well as unit rotation. The nominal system capacity is 16 tons.

The apartment building’s domestic hot water heating is supplemented by the desuperheaters of the four units, which are tied together in parallel and routed to the domestic hot water tank. Each unit has an internal domestic hot water circulator.

The load side of the system consists of multiple zones controlled by the individual apartment thermostats, giving residents control over the heating in each unit. The building has both one and two bedroom units but each apartment is an average of 932 square feet in size.

Learn how commercial geothermal heat pumps are the ideal choice for multi-unit residential buildings, download our Ebook: Six Ways Geothermal Energy Will Benefit Your Commercial Building.

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Comments

  1. Reply

    Andrea Smith

    October 08, 2022

    I am remodeling a house to make it into a duplex. Does Geothermal Heat Pump systems have a way to separate the usage for each unit for billing?

    • Dan Rheault

      October 17, 2022

      Hi, the heat pump itself does not provide any easy way to do that. You would either need separate heat pumps on separate meters, or a fairly sophisticated programmable controller with appropriate sensors to measure the heat provided to each unit. Without separate meters, it would be easier to just include heating/cooling with the rent.

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