Low Carbon Space Cooling - News
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Watkins Hire are a Leading temperature control rental company, after 149 years Watkins Hire continue to innovate, the latest innovation from Watkins Hire is their new mobile evaporative air cooler for Low carbon temporary cooling.
Many modern buildings require cooling either for the comfort of the occupants or to protect the processes or equipment they contain. There are three typical methods which can be employed to provide temporary space cooling these buildings; ventilation air handlers, evaporative cooling or a refrigeration based air conditioning system. The choice of system can have a dramatic effect on the total carbon emissions of the building due to their different electrical demands. See our Air Conditioning comparison table below to compare the features of Air Conditioning with Evaporative Cooling.
Ventilation Air handler systems can provide comfort cooling for most of the year. During prolonged periods of high temperatures they are unable to maintain internal temperatures below 25°C. Refrigeration based systems are effective but can be expensive to operate. Mobile Evaporative coolers, which can produce air consistently below 22°C in the UK climate, provides a temporary cooling solution which consumes only a fraction of the electricity.
For Low carbon cooling Mobile evaporative coolers typically consumes less than 15% of the electricity compared to the equivalent rated refrigeration based cooling system.
The latest building regulations have resulted in buildings which require less heating. The unintended consequence of this, in many instances the activities, heat generating equipment and number of occupants within the building now generate more heat than is required to maintain a comfortable temperature.
During the winter of 2008 Watkins Hire experienced many customers with buildings which required temporary air conditioning systems to operate during the winter! Electricity usage and the associated
carbon effect is increased dramatically. An evaporative cooling can address this with a cost effective and low carbon solution.
Low Carbon Cooling Example
The example shows how this electricity saving can result in 1.5 tonnes of carbon savings for a 30KW cooling requirement.
A building requiring 30KW peak load and 20KW minimum load. Cooling employed from April to October from 6am to 6pm 5 days per week in London with electricity cost 8p/kWhr and water cost £1.20/m3
| Running Costs - Annual | Evaporative Cooling | Air Conditioning | Saving |
|---|---|---|---|
| COP/EER | 66.4 | 3.4 | |
| Electricity KWhr | 1515 | 14770 | 13255 |
| Electricity Cost | £121 | £1,182 | £1,060 |
| Water Usage cuM | 45.5 | 0.0 | -45.5 |
| Water Cost | £54.65 | £0.0 | -£54.65 |
| Total Cost | £176 | £1,182 | £1,006 |
| 15% | 100% | 85% | |
| Running Costs - 1824 Hours | Evaporative Cooling | Air Conditioning | Saving |
| Water use per hour L | 25.0 | 0.0 | -25.0 |
| Cost per hour | £0.03 | 0.0 | -£0.03 |
| Electricity use per hour...(Read whole article) For more solutions please try www.hazeng.com or www.engineeringtrader.com 
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