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Water-Glycol Mixtures

Coolants are heat transfer media which are intended for use below 0°C. Due to its high specific heat capacity, water is often used even below 0 °C. However, pure water already freezes at 0 °C, i.e. the polar water molecules arrange themselves into ice crystals. Glycol as an additive is an effective solution for this

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F-Gas Regulations

As a part of the EU, the UK was subject to the terms and conditions of legislation governing the emissions and supply of fluorinated greenhouse gases in Europe. With effect from 1st January 2021 however, these regulations will no longer apply in Great Britain and will be replaced.

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EC Fans vs. Axial Fans

In HVAC applications, fans are second only to compressors in consuming power. Here we look at two types of fan motor that have a direct effect on the overall efficiency of a chiller or air handling unit

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The Ozone Depletion Process

The ozone layer is one layer of the stratosphere and the stratosphere is the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases that clings to our planet

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The Perception of Sound – Part 2

This is the second part of a small series on the topic of sound. In the first part we dealt with ‘The Perception of Sound’.  Here we now try to clarify physical facts of sound propagation in gases. In particular, we derive the one-dimensional wave equation from a simple model.

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Categories

Continuum Mechanics

Continuum Mechanics

Continuum mechanics deals with physical properties of e.g. fluids which are independent of any particular coordinate system in which they are observed.

The History of Refrigeration

The History of Refrigeration

Our ‘History of Refrigeration’ timeline gives you a brief glimpse into the key milestones of the development of refrigeration and air conditioning

Water-Glycol Mixtures

Water-Glycol Mixtures

Coolants are heat transfer media which are intended for use below 0°C. Due to its high specific heat capacity, water is often used even below 0 °C. However, pure water already freezes at 0 °C, i.e. the polar water molecules arrange themselves into ice crystals. Glycol as an additive is an effective solution for this

F-Gas Regulations

F-Gas Regulations

As a part of the EU, the UK was subject to the terms and conditions of legislation governing the emissions and supply of fluorinated greenhouse gases in Europe. With effect from 1st January 2021 however, these regulations will no longer apply in Great Britain and will be replaced.

EC Fans vs. Axial Fans

EC Fans vs. Axial Fans

In HVAC applications, fans are second only to compressors in consuming power. Here we look at two types of fan motor that have a direct effect on the overall efficiency of a chiller or air handling unit