About this presentation

related to ATMOsphere America 2014
published on 18 June 2014
12 pages
893 KB

Bruce I. Nelson, President of Colmac Coil Manufacturing, Inc. draws attention to the pitfalls of pumped ammonia systems, which maximise the amount of refrigerant in the evaporators. Direct expansion (DX) ammonia systems, manufactured by Colmac Coil present a solution to this problem, reducing the required amount of ammonia in the system and also improving energy efficiency. Nelson goes on to describe the characteristics of a Colmac Coil project in a large public refrigerated warehouse, presenting data regarding ammonia charge, energy-efficiency, power consumption and first costs.

About the speaker(s)

Bruce Nelson

 

Bruce Nelson is currently President of Colmac Coil Manufacturing, Inc. Located in Colville, Washington, Colmac manufactures Industrial HVAC and Refrigeration Equipment including all types of heating and cooling coils, refrigeration air coolers and condensers, and heat pipes for heat recovery.

Mr. Nelson obtained a B.S. in Agricultural Engineering from Washington State University and has been employed at Colmac since 1981. He is a licensed Professional Engineer in the State of Washington.

Mr. Nelson is an active member of ASHRAE at both the local and national levels having served as President of the Inland Empire Chapter in Spokane, as well as serving on various technical committees including TC1.3 (Heat Transfer and Fluid Flow). He is also an active member and currently serves as a Director of IIAR (International Institute of Ammonia Refrigeration). Mr. Nelson is the author of several technical papers related to the field of refrigeration and heat transfer and holds a number of US and International patents.