The Edge - Q3 2009 - (Page 13)

ENERGY SAVINGS | by Lawrence Caniglia Energy Crisis = OPPORTUNITY High energy costs and efforts to combat global warming are pushing us toward greater energy conservation that will continue to impact our industry. We already have examples of it here in our region. Last summer, the Town of Southampton on Long Island, New York, enacted the first of its kind energy code for swimming pools in the northeast. Then, in January 2009, Connecticut became the first state in the northeast to adopt Title 20 without revisions. Title 20 started in California as a program regulating the energy efficiency of portable hot tubs and pool pumps, among other products. The trend to energy-stingy products is here to stay. Thanks to many of our forward-thinking product manufacturers, the pool and spa professional can get in front of the trend by offering his/her customers energy-saving designs and products in new construction and retrofits. And come to think of it, in this economically challenging year, building up a business to retrofit pools and spas with money saving devices would be beneficial to the customer, to you and to the environment. smaller pump needed to push the water through. The maximum velocities allowed also serve a dual purpose of ensuring against suction entrapment. Estimated energy savings per year is 14.7 percent. Removing traditional hard 90 degree elbows in the piping adds to the reduction in TDH by lessening the resistance to the flow of water, again allowing for a smaller pump to push the same amount of water. Estimated energy savings per year: 3 percent, based on 50 percent unnecessary elbows; and 1.2 percent, based on efficient sweep elbows. Straight run pipe that is greater than or equal to at least four pipe diameters installed before the pump produces an estimated energy savings of from 4-28 percent. Using appropriately sized filters will result in a .5 percent energy savings. Proper sizing of backwash valves will yield a 5.9 percent energy savings. Directional inlets are available in many sizes. Improperly sized directional inlets will increase the TDH and reduce the energy savings. Using the least restrictive available based upon the number of returns will add to the energy savings. • DESIGNING THE PROPER SYSTEM Energy conservation begins at the design phase of a new pool and spa with efficient system layout, beginning with the pipes. Each component in the piping system (piping, fittings, valves, filters, heaters, etc.) produces a pressure drop (friction loss) that must be overcome by the pump. The larger the Total Dynamic Head (TDH), the greater the amount of power required to achieve a given flow rate. To state it another way, when water is flowing through the filtration system, if there were no obstructions and the water flowed in a straight path it would take very little force to push the water forward. In reality though, water flow is restricted by the size of the pipe, bends or turns in the pipe, filters, etc. All of these restrictions produce friction, causing resistance to flow, and requiring more force to push the water forward, which requires larger and larger pumps, thus more energy needed to power the system. Here are some quick tips to slash energy costs for your customers: • Resistance to flow, or TDH, can be greatly reduced and energy savings increased by increasing the size of the pipe. Simply stated, the larger the pipe the less friction or less resistance to the flow of the water, which equates to a • • • • POOL COVERS Swimming pools lose energy in a variety of ways, but evaporation is by far the largest source of energy loss. A Btu, short for British thermal unit, is a basic measure of thermal (heat) energy. It takes only one Btu to heat one pound of water one degree Fahrenheit (F), but each pound of 800F water that evaporates takes 1,048 Btus of heat out of the pool. Covering a pool when it is not in use is the single most effective means of reducing pool heating costs. Savings of 50-70 percent are possible. THE EDGE 13

Table of Contents for the Digital Edition of The Edge - Q3 2009

The Edge - Q3 2009
Contents
The President’s Message
Commercial Pools Struggle to Comply with Virginia Graeme Baker Act
Energy Crisis = Opportunity
Is There a Solar Energy Business in Your Future?
Project Focus
Five Sources of Error in Water Testing and What to do About Them
Perimeter Pool Decking
Pressure Testing to Detect and Locate Leaks
Index to Advertisers

The Edge - Q3 2009

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