By Tom Soukup
One thing is certain: to heat water in large swimming pools, a significant amount of energy is needed. Water heating systems are therefore robust. These systems are often powered by boilers and heat-exchangers, rather than the direct-fire pool heaters that are common in smaller pools.
The choice of boilers is based on two factors: they offer a longer system life cycle, and are more powerful than direct-fire heaters. In many installations, boilers are used not only to heat the water but also for dehumidification.
The author’s business specializes in the design, installation, and maintenance of pool heating systems. Heat is transferred from the boiler into the pool water using large heat exchangers. Plate-and frame heat exchangers can also be used. The company of the author prefers to use shell-and tube heat exchangers, but they add a unique twist. The company found that by making minor adjustments to the large pool heating system, energy savings of between 10 and 20 percent can be achieved. Gas savings of up to 40% can be achieved with more significant modifications.
Heat exchangers that are not maintained regularly can experience a decline in efficiency and even premature component failure. By the time a company is called for service, the efficiency of the heat exchanger has often decreased by over 25 percent due to factors like metal degradation, deposits and clogging.
The replacement of heat exchangers that are old is a great way to save fuel in large pools. It is surprising that an in-kind exchange is rarely the best option. The results can be great if you recalculate the heating load, and choose from different heat exchangers. It is important to choose the right heat transferr.
Shell and tube versus plate and frame
Due to their reduced head loss and ease of maintenance, shell-and tube heat exchangers offer a better alternative to plate-and frame heat exchangers. Some plate-and frame heat exchangers are slightly more efficient than their shell and tube counterparts. However, these heat exchangers often need a booster package to work as intended.
The post Upgrade large facility pool boilers to energy-efficient heating first appeared on Pool & Spa Marketing.
