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YMCA YARMOUTH
Located in Yarmouth, Nova Scotia, the YMCA Yarmouth operates year round offering recreational activities such as gym, aerobics, personal training, children activities, and swimming. The swimming pool is operated year round for family swims, as well as 3000 swimming sessions per year. The swimming pool is 30 ft x 50 ft with a shallow and deep end. The current method of heating the pool is by oil fired boilers transferring heat through a heat exchanger to the pool. A pneumatic control system regulates the amount of heat be transferred to the pool. The desired maintained pool temperature is 84 °F System Description In November 2003, Thermo Dynamics Ltd. was approached by the YMCA to design a solar thermal pool heating system to offset the cost of fuel oil. In July of 2004, TDL began to install, supplied and installed a solar pool heating system. Solar Collectors The solar collectors are mounted on a flat roof located
directly above the swimming pool. The collector mounting structure is
constructed of
galvanized steel channel. The structure is fastened to pressure treated
lumber which has been incorporated into the roof and weather proofed.
The orientation of the solar collectors is due south with an angle of
45° to the horizontal. There are a total of 40 Thermo Dynamics G32
solar collectors (119 m2 gross collector area; 127 m2 aperture area).
The solar collectors are the liquid-flat-plate type, with low-iron tempered
glass glazing and Sunstrip absorber plate. The solar collectors are arranged
in two arrays of 20 solar collectors. There is a front array of 20 solar
collectors and a rear array of 20 collectors. Within each array, there
are two sub-arrays of 10 solar collectors in parallel with each other.
Each sub-array of 10 solar collectors has 5 solar collectors plumbed
in series with another 5. The arrays are plumbed independently, and valved,
to allow servicing of one array without shutting down the entire system. Heat Exchangers Each solar collector
array has its own heat exchanger
bank.
The 2 banks are plumbed in parallel
on the pool side of the heat exchangers.
Therefore
if one solar collector array is shut down, the other array can continue
to supply heat to the swimming pool. Solar
Pumps™ and Photovoltaic
Modules A single differential controller complete with a 4 pole single throw relay, ensures that the collectors do not cool the pool water. As well, several thermostats have been installed to prevent pool water overheating.
View photographs of the installation
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