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Long ago, the industry determined that the combination of copper tubing and aluminum fins provided the most efficient transfer of thermal heat in condenser coils. Manufacturers of residential units are not necessarily on that same page — or that line of thinking — today. Most manufacturers, if not all, are revising, have revised, or continue to revise their outdoor coil construction. One of the main objectives, of course, is to increase heat transfer efficiency, as energy efficiency is high on every homeowner’s wish list. In the end, each manufacturer believes it has engineered and/or perfected — at least up to now — the most-efficient coil design. Some, like Goodman Manufacturing, have made changes as a direct result of the efficiency offered from R-410A refrigerant.
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A company called GreenCore Air has released an air conditioner than can be powered by a single 170 watt solar panel. The GreenCore air conditioning unit can heat and cool a 600 square foot room. It runs on DC power, so there is no need to put an AC inverter between the solar panel and the air conditioner. This eliminates the power losses associated with converting AC to DC. When the sun is not out the unit runs on the battery bank which is integrated within the unit. There two version of the air conditioner: a fixed one, and a mobile one that is mounted on wheels. GreenCore units are being tested by a McDonald’s restaurant and the U.S. Navy.
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Johnson Controls, a global leader in building efficiency, announced the new LX Series of air conditioners and heat pumps by York, its leading air conditioning, heating, refrigeration, and ventilating company. They feature a MicroChannel coil with enhanced heat transfer characteristics, enabling them to achieve the desired performance levels with less coil surface area than competitive condensers and up to 50 percent less refrigerant. The units are available with environmentally friendly R-410A refrigerant as well as R-22. 14.5 SEER LX Series air conditioners use a compressor blanket and swept-wing fan blade for quieter operation. 15+ SEER can be achieved when the air conditioner is matched with a variable-speed air handler or gas furnace. A fully louvered steel coil guard, corner posts and a polymer mesh protect the condensing coils from damage. The unit’s heavy-duty cabinet is made of powder-painted steel that resists corrosion and rust creep.\n\n\n\n\nIn addition, the MicroChannel coil offers better galvanic corrosion resistance than conventional coils. In testing, the coil withstood 7,000 hours of salt spray with a higher success rate than conventional coils at just 1,000 hours, making the units particularly desirable for seacoast applications, reveals the company’s press release.\n\n
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Monday, 28 July 2008 \nGuangdong Chigo Air Conditioner, a large-sized modern enterprise integrating the development, production and sales of household and commercial air conditioners, recently announced its agent in Egypt successfully won the contract for the Huawei correspondence station in Egypt after seven hardworking months.\n\n Huawei is said to have already achieved 12.56 billion dollars sales revenue, becoming one of the top five global telecommunications equipment producer, now with primacy globally, especially in Africa. Contracts for the correspondence station of Huawei in Egypt were mainly in the hands of Carrier for a long time, which means other brands could not compete with it and usually did not pass the test phase. Because the equipment for each station was valued at over 300 thousand yuan, the AC units could not run for a long time without a reliable capability guarantee. Right now the first set of Chigo splits is already installed in the station.\n\nThe vice president of Chigo Overseas Marketing Department , Mr. Peter Liao, said :”The success of this project means a lot for us. The intergrated ability of Chigo is already at new stage, being the supplier of a globally famous communication company. The cooperation with Huawei is meaningful for Chigo’s development in the North African and African markets.” For the success of the Huawei project, Huawei’s subsidiaries in Libya and Sudan have also started to cooperate with Chigo, reveals the company’s press release. \n\n\n
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Steel prices are expected to reach £1000 a tonne by the end of the year, according to a survey carried out by the Federation of Environmental Trade Associations among a hundred member companies of the Association of Ductwork Contractors & Allied Services — a rise of 50% in just 12 months. The survey also found that while prices had risen by about 20% since December, they were expected to soar by over 30% in the following six months. There is also no sign of when the upward trend will peak. Paul Roxburgh of ADCAS, says, ‘This is a problem that affects the whole industry, and one that requires a collective response. ‘We will be working with our colleagues in the contracting sector to make sure that there’s a realistic approach to increased costs — particularly in the context of long-term fixed-price contracts.’ ADCAS is also to boost its efforts to boost efficiency, such as encouraging the use of only standard sizes for spiral ductwork and components.
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PKE is the new range of ECO Coils&Coolers branded air condensers launched by Luvata for commercial AC and refrigeration applications. It is the enhanced offspring of the PCE range (currently phasing out), with improved efficiency and optimized sound emission parameters. Like all ECO Coils&Coolers ventilated units, even the PKE range is available for CO2 applications. The PKE offers an improved hauling and fastening system, thanks to new features. Moreover, the side panels are removable allowing easy access to the units’ internal compartments, which have been increased by 120 mm. In order to facilitate maintenance and service, the PKE range has also been equipped with special door holders with a hold open feature. For models with 4 and 5 fan motors, the number of doors has been reduced and the width has been increased, as to allow easy access to the internal components. Lastly, the base has been reinforced for particularly difficult installations. On the other hand, thanks to a compartment incorporated with the condenser to enclose the compressing and the electrical control units, called housing, the PKE range does not require long connection pipe-work, thus reducing the risk of possible leaks. The special internal surface of the compressor compartment has been designed so as to increase sound absorption, reveals the company’s press release.
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