| 摘要 |
<p>A low cost, preformed, synthetic resin, indirect air cooled atmospheric heat exchanger especially adapted for use in water cooling towers is provided which exhibits enhanced water cooling properties notwithstanding fabrication thereof from relatively inexpensive, corrosion-free polyvinyl chloride or like materials heretofore thought to have insufficient heat conductivity for practical use in heat exchangers. These improved results stem principally from the use of a plurality of spaced, elongated, hollow, open-ended, thin tube-like hot water receiving structures having vacuum-formed sidewalls configured with a multiple-chevron corrugation pattern to rigidify the exchanger and present series of continuous, vertically extending serpentine paths which maximizes the prime heat exchange area of the sidewalls and causes the descending water to follow the tortuous internal sidewall flow paths to slow the descent of the water and thereby facilitate cooling thereof; moreover, the corresponding, undulating outside wall surfaces of the exchanger increase the turbulence of external cooling air currents flowing therepast to further enhance the overall cooling efficiency of the exchanger. The latter is advantageously positioned below a hot water distribution basin so that quantities of air are siphonically entrained within the descending water to further slow the travel thereof through the exchanger and also preclude build-up of the normally slight, negative pressures therewithin to a level sufficient to collapse the relatively thin sidewalls of the exchanger. In preferred forms, the exchanger is fabricated from a plurality of elongated, inverted, substantially U-shaped preformed members interconnected along respective vertical margins to present a pack adapted to be tensionably supported in a water cooling tower structure. In addition, the packs are nestably stackable to permit easy installation and use thereof in a variety of cooling tower applications, for example in those employing both a wet and dry fill in combination.</p> |
