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Solar Thermal Collectors

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Questions and Answers

What is the purpose of the transparent cover in a flat-plate solar collector?

To increase conduction losses

To enhance absorption of solar radiation

To reduce convection and radiation losses (correct)

To allow easy access for maintenance

Why are flat-plate collectors advantageous compared to other types of solar collectors?

They are less expensive to manufacture

They collect both beam and diffuse radiation (correct)

They are more efficient in tracking the sun

They require less maintenance

What is the optimum orientation for flat-plate collectors in the Northern Hemisphere?

Directly toward the equator, facing south (correct)

Directly toward the equator, facing north

Directly toward the poles, facing north

Directly toward the poles, facing south

Why is the underside of the absorber plate and the two sides well insulated?

<p>To reduce conduction losses</p> Signup and view all the answers

What is the major purpose of flat-plate collectors' design consideration?

<p>To collect as much solar energy as possible at the lowest total cost</p> Signup and view all the answers

Study Notes

Flat-Plate Solar Collectors

The transparent cover in a flat-plate solar collector allows sunlight to pass through and reach the absorber plate, while preventing heat from escaping.
Flat-plate collectors are advantageous due to their simplicity, low cost, and ease of maintenance compared to other types of solar collectors.
In the Northern Hemisphere, the optimum orientation for flat-plate collectors is typically south-facing, tilted at an angle equal to the latitude of the location.
The underside of the absorber plate and the two sides are well insulated to minimize heat loss and maximize energy absorption.
The major design consideration for flat-plate collectors is to maximize the surface area for heat absorption while minimizing heat loss.

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Description

Learn about the working principle of solar thermal collectors, where solar radiation is absorbed by a blackened surface, transferred to a fluid medium, and then carried away for storage or use. Orientation and insulation are key factors in maximizing efficiency.