ENERGY MANAGEMENT
New solar thermal collectors from Dimplex D
implex is expanding its solar thermal water heating range with the launch of three new products;
a cost-effective flat plate collector, a high performance evacuated tube option and single branch pump station. The new options give Dimplex improved flexibility to offer a solution for every solar thermal installation.
With the anticipated introduction of the Renewable Heat Incentive later this year, the new solar products will help to meet demand and add flexibility for specifiers, creating a choice of solar collectors and hydraulic packs carrying the trusted Dimplex name.
Dimplex’s evacuated tube collectors have been specifically designed to give excellent performance in the more challenging northern European climates, delivering excellent transfer of solar energy to heat, thanks to a vacuum incorporated inside the tubes to insulate against heat loss caused by cold, wet and windy weather.
Available in a choice of 20 or 30 tube options, the direct flow system is quick and easy to install and can be mounted horizontally, vertically, or on flat roofs and façades. Tube replacement is straightforward and the tubes can be rotated to achieve the optimal alignment.
With a ten year guarantee, Dimplex’s evacuated tube collectors offer highly efficient generation of hot water for domestic and commercial applications. The new SOL201 flat plate collector offers an alternative to Dimplex’s SOL220 collector. A cost-effective solution, the SOL201 is suitable for vertical or horizontal mounting of up to three panels in series, making it ideal for domestic use. A laser-welded meander pipe with a highly selective absorber coating and 30mm rear and side insulation is covered by 3.2mm structured solar safety glass with 85 percent transmission, allowing the collector to absorb a wide range of light frequencies for maximum efficiency, while a powder-coated aluminium frame provides lightweight yet robust protection. The new single branch, flow only, pump station SOLPU0 completes the trio of new Dimplex solar thermal products and is offered as a cost-effective alternative to the existing pump station SOLPU1. The new pump station is combined with a controller in a new hydraulic pack which can be used with any of the Dimplex solar collectors. With two types of flat plate collector and an evacuated tube option, together with a choice of hydraulic packs containing pump station and controller,
Dimplex solar thermal solutions offer performance combined with improved flexibility, allowing specifiers to create a system able to meet the requirements exactly for any installation. Tel: 0845 601 5111 Email:
marketing@dimplex.co.uk www.dimplex.co.uk
ACS&T SLASHES COLD STORE COSTS A
CS&T Logistics, one of the UK’s leading cold storage and distribution companies, has cut running costs in one of its modern frozen food stores by 15 per cent after investing £6,500 in improving its building and energy management systems and controls with Next Control Systems. ACS&T spent the money on the stage four cold store at its Wolverhampton site and in doing so has generated a saving of £22,000 in year one. “We are always looking for ways to improve our efficiency, and the savings we have made with Next are a great return on investment, particularly because our controls were considered tight beforehand,” said ACS&T area facilities manager, Steve Pratt. Mr. Pratt can now
monitor and manage the
Area facilities manager Steve Pratt plans more energy savings at the ACS&T Wolverhampton site.
22| SUSTAINABLE FM | MARCH 2011
system via a mobile telephone link to a dedicated live web site.
The upgrade of the controls of the ammonia based refrigeration system was planned and installed by Hampshire based Next Control Systems, which took account of the fact that electricity which powered five compressors and nine evaporators was bought at varying tariffs depending on the time of day. Controls were changed so the store now runs at its lowest set point (minus 24 degrees C) at night when power is cheap and at a higher set point in daytime when electricity is more expensive.
An increase in compressor pressures and a reduction in discharge pressures made a significant contribution to the savings and their on-off controls were sequenced to minimise run times. Evaporators were sequenced with the result that it was often possible to run just two (instead of five) to achieve target temperatures.
The system also automatically measures and records temperatures
around the clock, benefiting customers of ACS&T, including McCain’s and 3663, which use the 53,647 cubic metres cold store and much of the space for nearly 8,850 pallets – around 25 per cent of the site’s cold storage. “The controlling software is so accurate I know precisely what our costs are on a half hourly basis,” said Mr. Pratt. Commenting on the success of the installation, Next Control Systems’ managing director, Tim Bartholomew said, “This is a modern cold store which had good controls and systems so the savings we have generated demonstrate just how effectively we have been able to improve and upgrade the existing control regime.” ACS&T operates from four centres in
Grimsby, Wolverhampton, Tewkesbury and Scarborough. The company’s extensive resources include 12 cold stores, 3 ambient stores, comprehensive co- packing facilities and large, dedicated and shared user multi-temp transport fleets. Tel. 01252 406398
www.nextcontrols.com
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