26. Which of the solar heating systems uses antifreeze solution in the collector

Question

26. Which of the solar heating systems uses antifreeze solution in the collector and piping? a. b. c. d. Direct Solar Water Heating Indirect pumped system Thermosyphon systems All of the other choices 27. Which of the following solar water heating systems does not use a controller? a. Thermosyphon systems b. Indirect pumped systems c. Direct Solar Water Heating d. All of the other choices 28. During charging the PCM thermal energy storage system, the PCM changes its phase from a. b. c. liquid to solid solid to liquid liquid to vapor 29. The collector with its mirrors called heliostats. Is a. The parabolic trough b. The Dish c. The tower d. The Fresnel 30. In solar thermal tower concentrating power plant, the temperature of the tower can reach a. 400°C b. 1000°C c. 600°C d. 288°C

Explanation / Answer

26. b. Indirect pumped system. Explanation: it is useful in climate with freezing temperatures. 27. b & c. Both are active systems and will use controllers and pipes. 28.b. Solid to liquid. Explanation: PCM absorbs more heat during this phase change. 29.b. The dish

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