Quantcast Pool Collectors

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The vacuum tubes used are either single wall or double wall. Single wall tubes are
built with a small absorber plate in the vacuum. Double wall tubes are similar to
thermos bottles, with the vacuum between the two tube walls. The absorber inside
the inner tube is not in a vacuum. (Figure 2-18)
Most evacuated tube collectors are made up of several tubes spaced apart to
reduce the total collector cost. To catch solar energy which falls between the tubes,
polished metal reflectors are used to direct solar energy into the back sides of the
tubes.
FIGURE 2-18
Single and
Double Wall
Evacuated Tube
Collectors
DOUBLE WALL
SINGLE WALL
Pool Collectors
Collectors used for heating swimming pool water operate at relatively low
temperatures during fairly warm times of the year. Consequently, the heat loss from
the collector will not be great under these conditions.
OPERATION
22
2.7 COMPONENT OPERATION





 


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