HEAT RECOVERY


Benefitting both pocket and environment


With closer attention being paid to energy consumption and the ways it can be reduced, the use of heat recovery systems within the overall HVAC market is only set to grow. Robert Franklin, sales director for Refrigeration and Air Conditioning at Wolseley looks into how heat recovery systems work, and why contractors should be selling the benefits to customers.


T


he European Union has made several steps to tackle climate change and ultimately reach the 2020 vision. Efforts include the introduction of the


F-Gas phase down, which has resulted in the acr industry as a whole making big changes, which some may say have been more challenging than others, but nevertheless, processes are shifting. It is important acr contractors understand how the market is moving on with recent legislative introductions the F-Gas phase down, and are aware of how supporting ‘green’ refrigerants, and other sustainable solutions can be efficient as well as affordable too. Technological advances are supporting sustainable


change With energy prices rising, when it comes to cooling


units, there are alternative products acr contractors should be exploring to help reduce overall energy bills. It’s no surprise cooling units create excess amounts of


heat. What’s important here is what happens to the heat produced. Generally, unless alternative technology or equipment is used alongside the cooling unit, the heat is


30 June 2018


lost – dispersed into the ambient air by fans which are a problem in themselves as they can often be loud and require extra energy to run. Savings can be made by using a heat recovery system. However, it is important to remember not all systems work in the same way. If we take traditional heat recovery systems, they usually only recover the desuperheating phase from hot gases which account for less than 20% of total recoverable energy. While this is better than using a cooling unit without a heat recovery system at all, the system isn’t recuperating all of the energy generated and so heat is still going to waste. Alternative heat recovery systems are available and more advanced in ensuring all the condensation heat is collected and then used to heat water. Through the use of Dual Condense Technology more heat can be recovered using two modes:  Water condenser mode: By using the cold water from the water tank, the heat recovery system condenses all of the refrigerant gas and recovers all of the rejected heat from the cooling unit. This takes place in its own


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