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FEATURE HVAC


DO YOU KNOW HOW MUCH HVAC cost you last year?


HVAC systems can devour more electricity than anything else in a commercial facility so how can you measure and control these costs?


T


he single biggest consumer of energy in a typical UK commercial building is


the heating, ventilation and air conditioning (HVAC) system. Over an average year the air con system alone could guzzle more electricity than a building’s annual heating bill, all the PCs and office equipment combined or two or three times the amount of energy used by the building’s entire lighting system. Help is at hand through a revolutionary


intelligent manifold that produces instant reports on exactly how energy efficient the air conditioning system is. Setting out the scale of the problem, Stephen Matthews, chief executive of CIBSE (Chartered Institution of Building Services Engineers) explains: “air conditioning systems can use as much as 30% of the electrical demand of a building so a poorly performing system will waste a large amount of energy.” That’s why for service and building


managers keeping air con equipment serviced and maintained to run at peak


efficiency is one of the easiest ways to: l Significantly reduce a building’s overall


energy usage l Enhance your corporate reputation by


lowering your carbon footprint l Make major gains in energy efficiency l Reduce costs connected with breakdown,


callouts and unplanned maintenance To compound the problem, with changes on the horizon for Energy Performance Certificates (EPCs) air con efficiency (which represents by far the biggest slice of the energy usage pie) will come under increasing scrutiny.


An EPC is a legal document which


details a building’s energy efficiency rating from A (very efficient) to G (inefficient). Changes involving EPCs are coming as part of a new law: the Minimum Energy Efficiency Standard (MEES) which as of 1 April 2018 will require rented commercial premises to have a rating of at least an E. Buildings currently rated with an F or G will need to improve efficiency in order to comply and estimates suggest approximately a fifth of UK business properties could be in the F & G rating brackets.


MONITORING AIR CON ENERGY EFFICIENCY One of the simplest ways for managers to check air con efficiency over time is to insist that service engineers use the right equipment to provide this information. While most digital gauges currently used don’t have this facility, the Imperial iManifold distributed exclusively in the UK by Advanced Engineering is the first


AIR-COOLED PAC DELIVERS PRECISE SUPPLY TEMPERATURE


Airedale International’s SmartCool SV DX i-drive (5-83kW) is a single circuit, air-cooled PAC that delivers very precise supply air temperature up to 26°C under variable heat loads and outside ambient conditions of -20°C to +50°C. An optional segregated evaporator coil allows a


high level of control over dehumidification and cooling capacity when operating under constant pressure control, helping to manage air distribution and prevent hot spots. Designed for use in high density applications using elevated return air temperatures, hot and cold aisle containment and perimeter cooling environments the SmartCool i-drive


range is available with the option of high capacity compressors for extreme temperature applications. Airedale’s ACIS Building Management System


controls software provides a simple-to-use tool to manage cooling and other building services from any manufacturer in a single, integrated system across multiple sites and communication protocols, providing 24/7 remote monitoring, optimising system operation and improving decision making.


Airedale International Air Conditioning T: 0113 239 1000 www.airedale.com


iManifold calculates a system’s capacity, evaporator performance, system electrical efficiency and dehumidification during routine air con service


of a new breed of ‘intelligent’ digital manifolds from the US and has won awards on both sides of the Atlantic. Unlike any other manifold on the


market it calculates a system’s capacity, evaporator performance, system electrical efficiency and dehumidification during a routine air con service. From these calculations the iManifold can produce a range of technical reports on a system’s efficiency and performance including instant measurements of the EER (Energy Efficiency Ratio) of an air con system using dynamic, live system data. The EER is a ratio calculated by dividing the cooling capacity of a system in Btus per hour, by the power input in watts expressed in Btu/hr per watt.


RECORDING AND TRENDING This information can even be plotted on live graphs in the field and detailed reports immediately emailed to building managers as a permanent record of an A/C system’s energy efficiency at a particular moment in time and stored in the cloud for future reference. Moreover, because this data is precise and the measurement instantly repeatable these reports can be compared over time, allowing supervisors and managers to spot trends throughout the year or over much longer periods, giving them all the information they need to monitor and control the efficiency of their air con system forever.


Advanced Engineering T: 01256 460 300 www.advancedengineering.co.uk


18 DECEMBER 2015/JANUARY 2016 | FACTORY EQUIPMENT / FACTORYEQUIPMENT


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