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10 Energy Efficiency


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Cooling efficiency spells reward all round


Green is not only the colour of sustainability it’s also the colour of money and it’s fair to say that poor quality cooling is literally burning money every second it operates, says Dougie Stoddart, commercial director at Hubbard Products.


WHILE SUSTAINABILITY and lowering a cooling equipment’s carbon footprint is always a worthwhile goal, reducing the financial cost of running cooling equipment is highly pertinent in today’s economic climate for the majority of refrigeration users.


Designing an efficient cooling system is only half the battle, capturing and re-using the by-product of energy, the heat produced by the cooling system, is proving to be a highly practical way of reducing overall energy bills in a wide range of commercial and light industrial applications.


Hubbard Products has been an ‘early- adopter’ in creating purpose made products that deliver financial benefits for its customers.


Hubbard was the first manufacturer to achieve the standards required by the Carbon Trust’s Energy Technology List at its inception in 2005.


Now, it has more than 30 qualifying, air-cooled condensing units on the list. Hubbard’s approach is to design its high- efficiency products from the ground up, rather than adapting existing designs. This ensures that the technical specification for each of its ECA qualifying units is 100% compliant with the most stringent standards set by the Carbon Trust and capable of delivering financial benefits from the point of commissioning. With a reputation for cellar cooling and conditioning systems, Hubbard created its air transfer unit (ATU) specifically for the On-License and Hospitality sector. The ATU is a simple approach that uses cool air from the outside environment to maintain cellar temperatures as an alternative to running refrigeration equipment to achieve the same result. The ATU does not replace traditional cooling it acts symbiotically with existing plant to improve the efficiency and therefore, reduce its running costs. The Hubbard Econ-O-Mate and Econ- O-Pack heat recovery systems are equally simple yet highly effective solutions that can be optionally specified or retro fitted to both air-cooled condensers and pack systems.


Popular with hospitality, supermarket, express retail and convenience store users these devices recover compressor


A supplement to ACR News May 2014


and refrigerant heat for hot- water generation, including pre- heating of boiler feed water.


The Hubbard units use a


refrigerant-to-water heat exchanger to recover the heat for purposes complementary to the refrigeration plant for use elsewhere and also de-superheats the refrigerant, which reduces the cooling duty of the condenser.


This approach can be used on all types of central


refrigeration systems but is especially effective with multiple compressors.


Energy prices have always been a major cost to commercial refrigeration users whether they be in retail, hospitality or industrial sectors and the average price of electricity for commercial users, including climate change levy, rose by 94% between 2002 and 2013.


When the Government in conjunction with Carbon Trust launched the Enhanced Capital Allowance scheme for energy- efficient capital items in 2005, Hubbard was already in a position to launch the first ETL approved Cellar Cooling System, the premium range, aimed squarely at the hospitality and on-licence sector, the range was a massive success.


Perhaps, as it was the only approved range available at the time that’s not so surprising, but the scale of interest and immediate take up of the product proved that our approach was exactly right. Now with the largest ETL air- cooled condensing unit range of any manufacturer our unique ability to add further products to extend the scope and reach of our customers energy reduction


programmes is setting the standard for our customers.


Hubbard’s latest addition to its ETL range of air-cooled condensing equipment is the Zenith Twin Scroll Digital Condenser.


The use of digital controls gives constantly variable performance that matches the precise need of the refrigeration user.


With a significant increase of the use of glass door cabinets in supermarket and convenience stores, to improve the retention of cooled air within the chiller cabinet, the use of digitally controlled compressors ensures that the unit operates on demand in contrast to permanently cycling through the traditional energy hungry, on-off process.


Launched in February 2014 the Zenith Twin is designed to respond to the move by supermarkets and independent retailers toward smaller, higher footfall express type outlets, with consequently, more demand for cabinet cooling at peak times and increased cabinet door openings.


Visit ACR News online at www.acr-news.com


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