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Home » Keywords: » heat transfer

Items Tagged with 'heat transfer'

ARTICLES

Don Fort and intelliGen Refrigeration Controller

Basic Refrigeration: Thermodynamics of Heat Transfer

First in series describes how temperature and pressure changes affect refrigerant
Don fort
Don Fort
February 1, 2023
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Technicians should understand how heat transfer works in a refrigeration system, as well as the four laws that describe how temperature and pressure changes affect the state of refrigerant in a sealed piping system.
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DHT-inc-logo.jpg

Diversified Heat Transfer Acquires Assets, Key Personnel of Sussman Electric Boiler

August 8, 2022
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Diversified Heat Transfer Inc. announced that it has acquired the assets and key personnel of Sussman Electric Boiler - Division of Sussman Automatic Corporation.


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Newsline ACHR NEWS
2017 AHR Expo — Education Classes

A Demonstration of Thermoboost Energy Transfer Additive at Work

January 2, 2017
No Comments

Thermoboost speeds up heat transfer, reducing the running costs of water based heating systems.


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marchese-joe

Ice Breaker: The Basics of Heat Energy

Refrigeration is all about transferring heat energy from one place to another
Joe marchese
Joe Marchese
November 7, 2016
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As heat energy is removed from a substance, its molecular activity will decrease; as heat energy is added, its molecular activity will increase. The intensity of this molecular activity affects the temperature of the substance.


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There is a clear difference between hard ice (right) and soft ice. Photo courtesy of Ferris State University

The Professor: A Toast to Decorative Spherical Ice

Ice is a serious business, but it can also be fun and creative
Headshot tomczyk john
John Tomczyk
September 12, 2016
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Homes, restaurants, bars, and businesses rely on clear, clean ice for many applications. Ice is considered a food source, and the water that makes the ice must be of good quality. Good quality water will produce a crystal-clear, hard piece of ice.


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The International Copper Association refers to round-tube, plate-fin (RTPF) coils made from smaller-diameter copper tubes as MicroGroove technology.

Coil Technologies Keep Evolving

These heat exchangers are becoming smaller, more efficient
Jen anesi headshot small
Jen Anesi
June 6, 2016
No Comments

The function of coils in heating and cooling systems is to transfer heat from one medium to another, either extracting heat from a building and expelling it outside or vice versa. Depending on the application, different technologies are available to ensure thermal energy is transferred as efficiently and cost-effectively as possible.


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These condenser fins have been bent horizontally and are blocking airflow through the condenser. Photos courtesy of John Tomczyk

The Professor: The Importance of the Condenser

Condensers perform three vital functions, so keep them clean and damage-free
Headshot tomczyk john
John Tomczyk
June 6, 2016
No Comments

One of the main components of any refrigeration or air conditioning system is the condenser. As its name indicates, the condenser condenses refrigerant vapor sent to it from the compressor. However, the condenser also performs other important functions, too. 


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A full cup of coffee (fuel) at 180°F brings the cup (heat exchanger) to 180°F.

An Introduction to the Combustion Process

What, exactly, is energy and heat transfer?
Jim Davis
December 21, 2015
No Comments

Whatever our comfort zone may be, if we do not have some understanding of the combustion process and heat transfer, neither method has much meaning or value.


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Figure 1. The heat output versus flow relationship for a 12-foot-long piece of typical residential fin-tube baseboard being supplied with 160°F water.

Heat Transfer: Nature Versus Math

Formulas and Assumptions Don’t Always Predict what Happens
Headshot siegmugshtnew
John Siegenthaler, PE
January 27, 2014
No Comments

The following formula has been around the North American hydronics industry for a long time: Btuh = 500 x gpm x delta T. It can be used to estimate the rate of heat transfer into or out of a device that has a stream of water flowing through it at a known flow rate, and with a measured temperature change between the inlet and outlet of that water stream.


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Dave Malinauskas of Cimco Refrigeration, Toronto, served as one of the presenters during the IIAR conference. His topic was transcritical CO2 in ice rinks.

Papers Ponder Ammonia, Heat Transfer

Ongoing Developments Regarding Natural Refrigerants and Continued Commitment to Refrigeration Basics
Powell web
Peter Powell
July 15, 2013
No Comments

Making ammonia work in traditional HFC territory, trying transcritical CO2 systems in ice rinks, and examining ways to apply refrigeration principles to heat transfer rates were just three topics of 13 papers (five in Spanish) presented at the most recent Industrial Refrigeration Conference and Expo.


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More Articles Tagged with 'heat transfer'
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