Difference between revisions of "Solar Thermal Technologies"
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[[Portal:Solar|►Back to Solar Portal]] | [[Portal:Solar|►Back to Solar Portal]] | ||
| − | = Overview | + | = Overview = |
'''Solar thermal technologies''' involve harnessing [[Solar Energy|solar energy]] for thermal energy (heat). | '''Solar thermal technologies''' involve harnessing [[Solar Energy|solar energy]] for thermal energy (heat). | ||
| − | Solar thermal technologies comprise flat or parabollic collectors (low and medium temperatures and high temperature collectors) concentrating sunlight mainly using mirrors and lenses. | + | Solar thermal technologies comprise flat or parabollic collectors (low and medium temperatures and high temperature collectors) concentrating sunlight mainly using mirrors and lenses. |
| − | = Solar Thermal Heating | + | = Solar Thermal Heating = |
| − | Solar heating is the utilisation of solar energy to provide process heat, especially in crop drying, water heating, cooking or space heating and [[Solar Cooling|cooling]]. Advanced designs are also used to generate electricity. | + | Solar heating is the utilisation of solar energy to provide process heat, especially in crop drying, water heating, cooking or space heating and [[Solar Cooling|cooling]]. Advanced designs are also used to generate electricity. |
| − | + | == Solar Water Heaters (SWH) == | |
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| − | == Solar Water Heaters (SWH) | ||
*See Main Article: [[Solar Water Heater|Solar Water Heaters]] | *See Main Article: [[Solar Water Heater|Solar Water Heaters]] | ||
| − | Solar collectors are applicable worldwide and are even suitable in areas with low solar radiation and short periods of sunshine.<ref name="Deutsche Energie-Agentur GmbH (dena), ‘Renewable Energy Solutions for Off-Grid Applications. Providing Electric Power and Heat for Regions without Grid Power or Connected to a Weak Grid’, 2013, http://www.renewables-made-in-germany.com/fileadmin/user_upload/Auslandsmarketing/Offgrid_2013_131020.pdf.">Deutsche Energie-Agentur GmbH (dena), ‘Renewable Energy Solutions for Off-Grid Applications. Providing Electric Power and Heat for Regions without Grid Power or Connected to a Weak Grid’, 2013, http://www.renewables-made-in-germany.com/fileadmin/user_upload/Auslandsmarketing/Offgrid_2013_131020.pdf.</ref> The technology of solar thermal water heaters is present worldwide and significant deployments occur already in emerging economies and developing countries. Technologies include glazed flat plate collectors, evacuated tube collectors, and lower-temperature swimming-pool heaters made from plastic tubes | + | Solar collectors are applicable worldwide and are even suitable in areas with low solar radiation and short periods of sunshine.<ref name="Deutsche Energie-Agentur GmbH (dena), ‘Renewable Energy Solutions for Off-Grid Applications. Providing Electric Power and Heat for Regions without Grid Power or Connected to a Weak Grid’, 2013, http://www.renewables-made-in-germany.com/fileadmin/user_upload/Auslandsmarketing/Offgrid_2013_131020.pdf.">Deutsche Energie-Agentur GmbH (dena), ‘Renewable Energy Solutions for Off-Grid Applications. Providing Electric Power and Heat for Regions without Grid Power or Connected to a Weak Grid’, 2013, http://www.renewables-made-in-germany.com/fileadmin/user_upload/Auslandsmarketing/Offgrid_2013_131020.pdf.</ref> The technology of solar thermal water heaters is present worldwide and significant deployments occur already in emerging economies and developing countries. Technologies include glazed flat plate collectors, evacuated tube collectors, and lower-temperature swimming-pool heaters made from plastic tubes |
| − | + | == Concentrating Solar Thermal Power == | |
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| − | == Concentrating Solar Thermal Power | ||
[[Concentrating Solar Power (CSP) - Basics and Introduction|Concentrating solar thermal power systems]] (CSP) use mirrors and tracking systems to focus sunlight from a large area into a small focussed beam. The concentrated heat is then used as a heat source for various applications, such as conventional steam-based power plant, desalination of water, or for cooking. A wide range of concentrating technologies exists; the most developed are the parabolic trough and the solar power tower. Two less well-developed technologies are dish concentrators and linear Fresnel reflectors. Various techniques are used to track the sun and focus light. Very common in CSP is the use of thermal energy storage, which can be used to provide heat at times when the sun is not shining. Energy storage via CSP is cost effective and almost all CSP systems are built with storage capacity up to 15 hours. | [[Concentrating Solar Power (CSP) - Basics and Introduction|Concentrating solar thermal power systems]] (CSP) use mirrors and tracking systems to focus sunlight from a large area into a small focussed beam. The concentrated heat is then used as a heat source for various applications, such as conventional steam-based power plant, desalination of water, or for cooking. A wide range of concentrating technologies exists; the most developed are the parabolic trough and the solar power tower. Two less well-developed technologies are dish concentrators and linear Fresnel reflectors. Various techniques are used to track the sun and focus light. Very common in CSP is the use of thermal energy storage, which can be used to provide heat at times when the sun is not shining. Energy storage via CSP is cost effective and almost all CSP systems are built with storage capacity up to 15 hours. | ||
Solar cooking can be done are relatively small scale and low cost using a wide range of technologies such as box cookers, solar bowls and the Scheffler reflector | Solar cooking can be done are relatively small scale and low cost using a wide range of technologies such as box cookers, solar bowls and the Scheffler reflector | ||
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= Solar Cooking = | = Solar Cooking = | ||
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The market is at a very early stage, with around 1-2,000 cooling systems have been installed up until 2014. The interest in solar cooling products continues to increase. They are more attractive, in case of high electricity prices and frequent electricity outages. Today, numerous systems from various manufacturers are offered on the market and have reached considerable technical maturity.<br/> | The market is at a very early stage, with around 1-2,000 cooling systems have been installed up until 2014. The interest in solar cooling products continues to increase. They are more attractive, in case of high electricity prices and frequent electricity outages. Today, numerous systems from various manufacturers are offered on the market and have reached considerable technical maturity.<br/> | ||
| + | = Further Information = | ||
| − | + | *[[Portal:Solar|Solar portal on energypedia]] | |
| − | + | *[[Solar Thermal Applications in Industries in India|Solar Thermal Applications in Industries in India]] | |
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| − | *[[Portal:Solar|Solar portal on energypedia]] | ||
| − | *[[Solar Thermal Applications in Industries in India|Solar Thermal Applications in Industries in India]] | ||
*[[Solar Water Heaters Worldwide - Market Development|Solar Water Heaters Worldwide - Market Development]] | *[[Solar Water Heaters Worldwide - Market Development|Solar Water Heaters Worldwide - Market Development]] | ||
*[[Solar Water Heaters – Project Examples|Solar Water Heaters – Project Examples]] | *[[Solar Water Heaters – Project Examples|Solar Water Heaters – Project Examples]] | ||
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| − | + | = References = | |
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| − | = References | ||
<references /><br/> | <references /><br/> | ||
Latest revision as of 13:50, 29 March 2022
Overview
Solar thermal technologies involve harnessing solar energy for thermal energy (heat).
Solar thermal technologies comprise flat or parabollic collectors (low and medium temperatures and high temperature collectors) concentrating sunlight mainly using mirrors and lenses.
Solar Thermal Heating
Solar heating is the utilisation of solar energy to provide process heat, especially in crop drying, water heating, cooking or space heating and cooling. Advanced designs are also used to generate electricity.
Solar Water Heaters (SWH)
- See Main Article: Solar Water Heaters
Solar collectors are applicable worldwide and are even suitable in areas with low solar radiation and short periods of sunshine.[1] The technology of solar thermal water heaters is present worldwide and significant deployments occur already in emerging economies and developing countries. Technologies include glazed flat plate collectors, evacuated tube collectors, and lower-temperature swimming-pool heaters made from plastic tubes
Concentrating Solar Thermal Power
Concentrating solar thermal power systems (CSP) use mirrors and tracking systems to focus sunlight from a large area into a small focussed beam. The concentrated heat is then used as a heat source for various applications, such as conventional steam-based power plant, desalination of water, or for cooking. A wide range of concentrating technologies exists; the most developed are the parabolic trough and the solar power tower. Two less well-developed technologies are dish concentrators and linear Fresnel reflectors. Various techniques are used to track the sun and focus light. Very common in CSP is the use of thermal energy storage, which can be used to provide heat at times when the sun is not shining. Energy storage via CSP is cost effective and almost all CSP systems are built with storage capacity up to 15 hours.
Solar cooking can be done are relatively small scale and low cost using a wide range of technologies such as box cookers, solar bowls and the Scheffler reflector
Solar Cooking
- Main article: Cooking with the Sun
Solar cooking allows cooks to heat, cook, bake or pasteurize food or drink. Solar Energy can be an ideal component of the energy mix of a household to complement other combustion-based stoves that can produce heat on demand based on other fuels if the sun does not shine. Local dishes. cooking habits and local climatic conditions determine how much alternative fuels can be saved, around 30%-40%.[2]
Solar Thermal Cooling
- See Main article on Solar Cooling
Solar thermal energy power stations may also be used for cooling: this refers to either cooling buildings (air conditioning) or industrial processes (refrigeration). Through evaporation and condensation, the solar thermal energy is processed as cold.
There are open and closed systems. Most widely used are closed systems like absorption refrigeration machines and open cooling and dehumidifying processes, such as sorption-supported air conditioning.
The market is at a very early stage, with around 1-2,000 cooling systems have been installed up until 2014. The interest in solar cooling products continues to increase. They are more attractive, in case of high electricity prices and frequent electricity outages. Today, numerous systems from various manufacturers are offered on the market and have reached considerable technical maturity.
Further Information
- Solar portal on energypedia
- Solar Thermal Applications in Industries in India
- Solar Water Heaters Worldwide - Market Development
- Solar Water Heaters – Project Examples
- http://en.wikipedia.org/wiki/Solar_thermal_energy
- http://www.therenewableenergycentre.co.uk/solar-heating
- http://www.isfh.de/institut_solarforschung/solarthermie.php
- http://en.wikipedia.org/wiki/Solar_thermal_collector
- practicalaction.org/solar-thermal-energy-1
- International Energy Agency. ‘Renewable Energy Essentials: Solar Heating and Cooling’, 2009. https://www.iea.org/publications/freepublications/publication/Solar_heating_cooling.pdf
- http://www.undp.org/content/undp/en/home/ourwork/ourstories/india-brings-sun-into-the-kitchen.html
- For information about Quality Infrastructure for Renewable Energies and quality infrastructure for solar energy in the context of climate change, please refer to the linked articles.
References
- ↑ Deutsche Energie-Agentur GmbH (dena), ‘Renewable Energy Solutions for Off-Grid Applications. Providing Electric Power and Heat for Regions without Grid Power or Connected to a Weak Grid’, 2013, http://www.renewables-made-in-germany.com/fileadmin/user_upload/Auslandsmarketing/Offgrid_2013_131020.pdf.
- ↑ GTZ HERA (2007): Here Comes the Sun. Options for Using Solar Cookers in Developing Countries.
