petak, 04.11.2011.



Direct Expansion Geothermal Heat Pump

direct expansion geothermal heat pump

    direct expansion
  • In direct expansion geothermal heat systems, geothermal heat is absorbed directly by the working fluid (coolant). This results in higher performance factors than with brine systems since there is no need for the brine circulating pump and a heat exchanger.

  • (DX) Refers to the more common refrigerant evaporator coil. This coil usually has a direct expansion valve (supplied by others) connected to the coil distributor.

    geothermal heat
  • Geothermal heating is the direct use of geothermal power for heating applications. Humans have taken advantage of geothermal heat this way since the Paleolithic era. Approximately seventy countries made direct use of a total of 270 PJ of geothermal heating in 2004.

  • A light shoe, in particular

  • a mechanical device that moves fluid or gas by pressure or suction

  • A man's slip-on patent leather shoe for formal wear

  • deliver forth; "pump bullets into the dummy"

  • A woman's plain, lightweight shoe that has a low-cut upper, no fastening, and typically a medium heel

  • operate like a pump; move up and down, like a handle or a pedal; "pump the gas pedal"

direct expansion geothermal heat pump - An experimental

An experimental study on the inherent operational characteristics of a direct expansion (DX) air conditioning (A/C) unit [An article from: Building and Environment]

An experimental study on the inherent operational characteristics of a direct expansion (DX) air conditioning (A/C) unit [An article from: Building and Environment]

This digital document is a journal article from Building and Environment, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Media Library immediately after purchase. You can view it with any web browser.

For residential buildings located in the subtropics, direct expansion (DX) air conditioning (A/C) units are commonly used for environmental control. However, the use of standard DX A/C units having constant-speed compressor and relying on on-off cycling often leads to either space overcooling or an uncontrolled indoor humidity level, due to high latent cooling load resulted from hot and humid climates. This paper reports on an experimental study to investigate the inherent operational characteristics of a DX A/C unit at a fixed inlet air state when the speeds of both its compressor and supply fan are varied. The experimental results of the inherent operational characteristics related to both equipment sensible heat ratio (SHR) and operating efficiency are reported. Issues related to the practical applications of the inherent characteristics and their possible constrains are discussed.

85% (13)

Sports Direct staff eye Ł44,000 bonuses

Sports Direct staff eye Ł44,000 bonuses

Ahead of its annual profit report, Sports Direct has told thousands of employees to expect a bonus worth an average ?44,000 each if the value sportswear chain meets profit targets.

Around 2,000 members of staff that have worked at the chain for more than two years will be given 125p shares worth 75 percent of their salary. Added to this is a bonus of 25 percent of salary last year, bringing each pay out to ?44,370 at Friday’s closing share price of 261p, making it one of the most generous bonuses on the high street. Staff can cash in the shares after July 2012.

The scheme, which is the brainchild of Sports Direct founder Mike Ashley was put in place to help improve the chain’s trading performance two years ago. At the time an average bonus was worth ?25,000, as the company’s shares traded at less than a ?1.

Sports Direct chief executive David Forsey has said the scheme is a significant contributor to Sports Direct’s improved performance, and that is would be extended to cover 2012 and 2013.

The retailer, which owns more than 400 shops is expected this week to announce year-on-year profits up at least 20 percent before charges and the bonus payouts.

Morrisons targets Iceland in expansion bid

Morrisons targets Iceland in expansion bid

Morrisons has its sights set on Iceland as part of an aggressive expansion plan.

According to The Independent, Morrisons is "aggressively outbidding its rivals" to secure new stores, mainly in the south of England.

The Bradford-based grocer has demonstrated a renewed determination to stand as a formidable competitor to the likes of Tesco and Asda since Dalton Phillips joined the company as chief executive in March 2010. Buying Iceland, which made profits of ?184.2 million on sales of ?2.2 billion last year, would be the most aggressive move yet made by Phillips who was also the driving force behind the acquisition of and the purchase of a 10 percent stake in New York-based online grocer Fresh Direct.

There is no specific word on the extent of Morrisons’ ambitions but it was one of the first companies to be linked to the proposed sale of a majority stake in Iceland later this year. The food retailer is not the only business to show an interest in Iceland; Sainsbury’s, Asda, Apax, Lion Capital and BC Partners are also understood to be interested.

direct expansion geothermal heat pump

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04.11.2011. u 04:44 • 0 KomentaraPrint#^

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