HPAC Magazine

Topic
Refrigeration

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NRCan posts new technical bulletins re: Amendment 15

April 20, 2017

The Heating, Refrigeration and Air Conditioning Institute (HRAI) reports that a Notice of Intent was published in the Canada Gazette, Part I on March 4, 2017 indicating Natural Resources Canada’s intent to proceed with the development of Amendment 15. This

News ManagementRefrigeration

RSES Canadian Capital Chapter to host annual conference

March 24, 2017

UPDATED The annual Refrigeration Service Engineers Society (RSES) Canada Conference will be held at Algonquin College in Ottawa on May 5 and 6, 2017. The program includes four speakers, opportunities to test for the CM, CMS designation and a dinner

News EngineeringHVAC SystemsManagementRefrigeration

ASHRAE heads west for annual conference

March 21, 2017

ASHRAE’s Annual Conference will be held June 24 to 28 in Long Beach, CA. The five-day event boasts eight conference tracks, tours, social events and a keynote message from Derreck Kayongo, CEO of the Center for Civil and Human Rights.

Feature Article EngineeringHVAC SystemsRefrigeration

Introduction to refrigeration defrost methods-Part II

March 19, 2017 by Dave Demma

Refrigeration systems operating with saturated suction temperatures below freezing will eventually experience an accumulation of frost on the evaporator tubes and fins. The frost serves as an insulator between the heat to be transferred from the space and the refrigerant,

News HVAC SystemsRefrigeration

Modifications to basic defrost schemes add yet another layer of complexity

February 13, 2017

It is inevitable that refrigeration systems operating with saturated suction temperatures below freezing will eventually experience an accumulation of frost on the evaporator tubes and fins. The frost serves as an insulator between the heat to be transferred from the

refrigeration defrost
Feature Article HVAC SystemsRefrigeration

Introduction to refrigeration defrost methods — Part I

February 10, 2017 by Dave Demma and Bob Schindler

It is inevitable that refrigeration systems operating with saturated suction temperatures below freezing will eventually experience an accumulation of frost on the evaporator tubes and fins. The frost serves as an insulator between the heat to be transferred from the

News CoolingForced AirHVAC SystemsManagementRefrigeration

Danfoss inaugurates first test chamber of its new customer Application Development Center

February 6, 2017

Danfoss recently opened a test chamber at its new Engineering Tomorrow Application Development Center in Tallahassee, FL. The first of three psychrometric rooms, it will accommodate air-conditioning systems up to 12.5 tons. Its purpose is to help the industry in

Feature Article HVAC SystemsRefrigeration

Common causes of refrigerant leaks and how to fix them

December 15, 2016 by Dave Demma

I met with a supermarket chain recently and the subject of refrigerant leaks came up. This is not surprising given the fact that R22 prices continue to escalate as the supply continues to shrink. I asked the director of facilities

News HPAC GeneralRefrigeration

Carlyle offering compressors for refrigerants R448A and R449A

November 25, 2016

Carlyle Compressor has announced that selected models of reciprocating semi-hermetic compressors are approved to operate with refrigerants R448A and R449A. “We are responding to our customers’ changing attitudes toward new, alternate refrigerants,” said Robert Ochs, western regional sales manager. “As

refrigeration,walk-in boxes
Feature Article ConstructionControlsEngineeringHPAC GeneralHVAC SystemsRefrigeration

How to size refrigeration correctly for the box and application

October 26, 2016 by Dave Demma

The key to a properly operating walk-in box system starts with a good design and the basis of a good design is to accurately determine what the refrigeration heat load is. To do this one has to realize that heat