What are the characteristics of flat plate collector?

What are the characteristics of flat plate collector?

3.1 Overview of Flat Plate Collectors

• Black surface – absorbent of the incident solar energy.
• Glazing cover – a transparent layer that transmits radiation to the absorber, but prevents radiative and convective heat loss from the surface.
• Tubes containing heating fluid to transfer the heat from the collector.

Which part of flat plate collectors is coated in black?

Which part of flat plate collectors is coated in black? Explanation: Absorber plate is usually metallic or coated in black surface which is used for absorbing radiation energy. The absorber plate’s coating directly affects how efficient the collector is.

What are flat plate collectors describe their materials?

A solar flat plate collector typically consists of a large heat absorbing plate, usually a large sheet of copper or aluminium as they are both good conductors of heat, which is painted or chemically etched black to absorb as much solar radiation as possible for maximum efficiency.

What is the flat plate collector?

A flat-plate collector (FPC) is a device to collect solar energy and transform it into thermal energy (low-grade energy) by using water as a working fluid. It is a heart of solar thermal devices that has many applications in a medium temperature range ≅100 °C from domestic to preheating to industrial sectors.

What are the components of flat plate collector Mcq?

Explanation: A flat plate solar collector consists of various components. Firstly, it consists of a flat box or an enclosure to hold the entire setup. A dark coloured plate is fitted with fluid circulation passageways and transparent cover. Finally, a circulating fluid which flows through the entire setup.

Which type types of radiations are absorbed by flat plate collector?

6.1. This is mounted in a hermetically sealed frame with transparent cover which is penetrable to the solar radiation at the top and good thermal insulation at the bottom. The solar energy is absorbed from the black surface and supply heat to a fluid which is circulated in the pipes or the channels.

Which element would not be suitable for absorber plate in flat plate collector?

Explanation: Evacuated flat-plate solar collectors are a more recent technology. It uses steam as its circulating fluid. Nitrogen and hydrogen are not used as circulating fluid.

What are the main disadvantages of flat plate solar collector?

The principal disadvantage of a flat plate collector is that because of the absence of optical concentration, the area from which heat is lost is large. Also due to the same reason high temperatures cannot be attained and as a result the collection efficiency is generally low.

Where are flat plate collector used?

The roof of a house has flat-plate collectors that capture solar energy to heat air or water. A building roof with flat-plate collectors that capture solar energy to heat air or water.

Which types of radiations are observed by flat plate collector?

Due to the simplicity of design, the flat plate collectors are extensively used for water heating. It requires very little maintenance and can collect both direct and diffuse radiation.

Where are flat plate solar collector used?

Flat-plate collectors are the most common solar collectors for use in solar water-heating systems in homes and in solar space heating.

What is a flat plate?

The flat plate is a two-way reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. The flat slab is a two-way reinforced structural system that includes either drop panels or column capitals at columns to resist heavier loads and thus permit longer spans.

Which is the best description of a flat plate collector?

Black surface – absorbent of the incident solar energy. Glazing cover – a transparent layer that transmits radiation to the absorber, but prevents radiative and convective heat loss from the surface. Tubes containing heating fluid to transfer the heat from the collector.

What makes up a flat plate solar collector?

A conventional flat-plate collector is made up of a flat absorbing plate, normally metallic upon which solar radiation falls and is absorbed, changing to heat energy. The absorb plate is usually black in colour for optimum collection and its area is the same as the area intercepting the radiation.

What makes a good flat plate heat transfer collector?

The key considerations in flat plate collector design are maximizing absorption, minimizing reflection and radiation losses, and effective heat transfer from the collector plate to the fluids. One of the important issues is obtaining a good thermal bond between the absorber plate and changes (tubes or ducts containing the heat-transfer fluids).

What’s the stagnant fluid temperature in flat plate collectors?

Due to the introduction of selective coatings, the stagnant fluid temperature in flat-plate collectors has been shown to reach 200 o C. – What are the typical materials used for absorber plates and glazing covers?