Open Heliostat Array Project - Revision history

Rasmus: /* Examples of uses on the farm */ inserted internal link

2012-04-13T13:56:26Z

Examples of uses on the farm: inserted internal link

← Older revision		Revision as of 13:56, 13 April 2012
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	* steam to run a steam engine		* steam to run a steam engine
	* steam to make superheated steam, for food preservation (http://opensourceecology.org/wiki/Food_Drying_with_Superheated_Steam)		* steam to make superheated steam, for food preservation (http://opensourceecology.org/wiki/Food_Drying_with_Superheated_Steam)
			* various drying needs (grain drying, other biomass drying)
	* solar pyrolysis: biomass is heated by solar concentrator, releasing [[syngas]]		* solar pyrolysis: biomass is heated by solar concentrator, releasing [[syngas]]
	* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.		* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.
	* ~~various drying needs (grain drying, other biomass drying)~~		* http://opensourceecology.org/wiki/Solar_Upgrading_of_Hydrocarbons
	* etc.		* etc.

Rasmus: /* Examples of uses on the farm */ inserted internal link

2012-04-13T13:52:35Z

Examples of uses on the farm: inserted internal link

← Older revision		Revision as of 13:52, 13 April 2012
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	===Examples of uses on the farm===		===Examples of uses on the farm===
	* steam to run a steam engine		* steam to run a steam engine
	* steam to make superheated steam, for food preservation		* steam to make superheated steam, for food preservation (http://opensourceecology.org/wiki/Food_Drying_with_Superheated_Steam)
	* solar pyrolysis: biomass is heated by solar concentrator, releasing [[syngas]]		* solar pyrolysis: biomass is heated by solar concentrator, releasing [[syngas]]
	* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.		* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.

Rasmus: /* Examples of uses on the farm */

2012-04-11T18:02:51Z

Examples of uses on the farm

← Older revision		Revision as of 18:02, 11 April 2012
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	===Examples of uses on the farm===		===Examples of uses on the farm===
			* steam to run a steam engine
			* steam to make superheated steam, for food preservation
			* solar pyrolysis: biomass is heated by solar concentrator, releasing [[syngas]]
	* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.		* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.
			* various drying needs (grain drying, other biomass drying)
			* etc.

	===Individual Heliostats===		===Individual Heliostats===

Rasmus: /* Examples of uses on the farm */

2012-04-11T17:57:16Z

Examples of uses on the farm

← Older revision		Revision as of 17:57, 11 April 2012
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	===Examples of uses on the farm===		===Examples of uses on the farm===
	(~~insert here~~)		* electricity: recently (ref: http://bit.ly/IzPwR1), hybrid gas/solar turbines have been built. Air is heated up and then "co-fired" with gas, reducing the amount of gas needed. Modern gas microturbines are very flexible and can run on all kinds of gaseous and even liquid biofuels.

	===Individual Heliostats===		===Individual Heliostats===

Rasmus at 09:39, 8 March 2011

2011-03-08T09:39:32Z

← Older revision		Revision as of 09:39, 8 March 2011
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	Different optical configurations are possible, such as:		Different optical configurations are possible, such as:
	*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see above) This is one possible configuration. It makes the energy very convenient to work with at ground level.		*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see above) This is one possible configuration. It makes the energy very convenient to work with at ground level.

	* ''' Solar tower'''		* ''' Solar tower'''
			* [[Parabolic_to_fiberoptic\|'''fiber optic''']]

	* '''add configuration'''		* '''add configuration'''

Conor at 18:58, 15 February 2011

2011-02-15T18:58:45Z

@@ Line 1: / Line 1: @@
 [[File:Heliostat_Array_Cassegrain_reflector.jpg|400px|thumb|right|Field of heliostats in a "beam down" Cassegrain reflector arrangement. The array focuses the sunrays onto a hyperbolic reflector which brings them down to ground level where a solar thermal reactor is located.]]
@@ Line 25: / Line 26: @@
 * open source software for the array
 * solar multi-reactor

Rasmus at 12:07, 29 January 2011

2011-01-29T12:07:21Z

← Older revision		Revision as of 12:07, 29 January 2011
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	[[Category:Solar Power]]		[[Category:Solar Power]]
	[[Category:Energy]]		[[Category:Energy]]
	[[Category:~~Biofuels~~]]		[[Category:Biofuel]]

Rasmus at 21:15, 28 January 2011

2011-01-28T21:15:44Z

← Older revision		Revision as of 21:15, 28 January 2011
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	[[File:Heliostat_Array_Cassegrain_reflector.jpg\|400px\|thumb\|right\|Field of heliostats in a "beam down" Cassegrain reflector arrangement. The array focuses the sunrays onto a hyperbolic reflector which brings them down to ground level where a solar thermal reactor is located.]]		[[File:Heliostat_Array_Cassegrain_reflector.jpg\|400px\|thumb\|right\|Field of heliostats in a "beam down" Cassegrain reflector arrangement. The array focuses the sunrays onto a hyperbolic reflector which brings them down to ground level where a solar thermal reactor is located.]]

	Multiple heliostats can be set up as an array, with all heliostats focusing on one target. The main idea of the Open Heliostat Array Project is to ~~provide~~ inexpensive heliostat arrays for the agricultural setting. This would provide energy for a variety of uses on the farm itself and its surroundings. The land could still be used for pasture, with decent biomass yield.		Multiple heliostats can be set up as an array, with all heliostats focusing on one target. The main idea of the Open Heliostat Array Project is to develop inexpensive heliostat arrays for the agricultural setting. This would provide energy for a variety of uses on the farm itself and its surroundings. The land could still be used for pasture, with decent biomass yield.

	A reasonably-sized array would collect thermal energy of 200-300 kW at peak, which might well be enough to make the farm completely energy independent. Note that the array can be focused on various different targets at different times. For some applications requiring high energy density (e.g. steam engine, thermochemistry, metallurgy etc.), the heliostats would focus on the hyperbolic mirror, while for other applications, a nearby greenhouse or large solar food dryer might be the target.		A reasonably-sized array would collect thermal energy of ~200-300 kW at peak, which might well be enough to make the farm completely energy independent. Note that the array can be focused on various different targets at different times. For some applications requiring high energy density (e.g. steam engine, thermochemistry, metallurgy etc.), the heliostats would focus on the hyperbolic mirror, while for other applications, a nearby greenhouse or large solar food dryer might be the target. The array could also be split up into different groups, reflecting onto separate targets for some time, then realigning again. The farmer would decide ahead of time how to best utilize the expected sunlight on any given day, and program the array accordingly. Having this additional energy available allows more of the added value (food, fuels) to be captured on the farm.

	The array could also be split up into different groups, reflecting onto separate targets for some time, then realigning again. The farmer would decide ahead of time how best to utilize the expected sunlight on any given day, and program the array accordingly. Having this additional energy available allows more of the added value (food, fuels) to be captured on the farm.

	===Possible Configurations===		===Possible Configurations===

Rasmus: /* Possible Configurations */

2011-01-28T14:44:10Z

Possible Configurations

← Older revision		Revision as of 14:44, 28 January 2011
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	===Possible Configurations===		===Possible Configurations===
	Different optical configurations are possible, such as:		Different optical configurations are possible, such as:
	*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see ~~right~~)- This is one possible configuration. It makes the energy very convenient to work with at ground level.		*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see above) This is one possible configuration. It makes the energy very convenient to work with at ground level.

	* ''' Solar tower'''		* ''' Solar tower'''

Rasmus: /* Possible Configurations */

2011-01-28T14:43:32Z

Possible Configurations

← Older revision		Revision as of 14:43, 28 January 2011
Line 9:		Line 9:
	===Possible Configurations===		===Possible Configurations===
	Different optical configurations are possible, such as:		Different optical configurations are possible, such as:
	*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see right). This is one possible configuration. It makes the energy very convenient to work with at ground level.		*'''"Beam-down" [http://en.wikipedia.org/wiki/Cassegrain_reflector Cassegrain reflector]''' (see right)- This is one possible configuration. It makes the energy very convenient to work with at ground level.

	'''* Solar tower'''		* ''' Solar tower'''

	'''* add configuration'''		* '''add configuration'''

	'''* add configuration'''		*''' add configuration'''

	===Examples of uses on the farm===		===Examples of uses on the farm===