| 摘要 |
Solar collectors with vacuum tube with three walls, with two inner metal tubes from bronze, copper or stainless steel and a glass outer tube which are placed in the focus of semicylindrical paraboloid reflectors, which either will be connected in series and will become solar collectors of vacuum tubes and paraboloid reflector of open circuit or will be connected in the upper end directly to an insulated water tank with automatic thermostatic mixing for homes.
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