Ammonia21
Summary
Cimco Refrigeration, a Toronto, Canada-based industrial refrigeration contractor, has completed a low-charge ammonia/NH3 (R717) heating/cooling system, to be linked to a district energy-sharing system for a planned community of 30,000 residents in Edmonton, Canada.
The 536-acre community, called Blatchford, is under construction. It is designed to be a sustainable community “that uses 100% renewable energy, is carbon neutral, significantly reduces its ecological footprint and monetary living costs,” said Cimco in a case study about the project. “By having high-efficiency buildings, utilizing energy sources and sharing energy, Blatchford homes and buildings will produce approximately 75% fewer greenhouse gas emissions in comparison to standard community condo and residential construction.”
Cimco said it will be monitoring the energy consumption to confirm it achieves its target.
The heat pump is part of a District Energy Sharing System (DESS) that will deliver heating, cooling and provides hot water to buildings throughout the community. The DESS will employ renewable energy sources, geothermal exchange and sewer heat exchange.
“This is the first project of this kind for Cimco,” said Jonathan Berney, Cimco’s Business Development Manager. “My understanding is that this concept is very common in Europe.”
The geothermal-source reversible heat pump, with an ammonia charge of 255lbs (116kg), has a capacity of 250TR (kW), and includes automatic winter heating and summer cooling modes, using glycol in both cases. It includes a Mayekawa reciprocating compressor, VFD-driven with a 150HP motor; as well as two flooded Alfa Laval plate-and-frame fluid-to-ammonia heat exchangers.
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