Solar heat gain coefficient - Revision history

Designing Buildings at 09:07, 8 October 2020

2020-10-08T09:07:37Z

← Older revision		Revision as of 09:07, 8 October 2020
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	* Zero carbon non-domestic buildings.		* Zero carbon non-domestic buildings.

−	[[Category:~~Standards_/_measurements~~]] [[Category:~~DCN_Standard~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Standards_/_measurements]]

Designing Buildings at 14:07, 20 January 2019

2019-01-20T14:07:57Z

← Older revision		Revision as of 14:07, 20 January 2019
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	Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.		Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.

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	Solar heat gain coefficients, as with g-values can refer to the centre-of-glass SHGC or can relate to the entire window, including frame.		Solar heat gain coefficients, as with g-values can refer to the centre-of-glass SHGC or can relate to the entire window, including frame.

−	= ~~Find out more~~ =	+	= Related articles in Designing Buildings Wiki =

−	~~=== Related articles in Designing Buildings Wiki ===~~	+	* BREEAM.
−	*BREEAM.	+	* Code for Sustainable Homes.
−	*Code for Sustainable Homes.	+	* Computational fluid dynamics (CFD).
−	*Computational fluid dynamics (CFD).	+	* Emission rates.
−	*Emission rates.	+	* Emissivity.
−	*Emissivity.	+	* Energy certificates.
−	*Energy certificates.	+	* Environmental legislation.
−	*Environmental legislation.	+	* g-value.
−	*g-value.	+	* Green deal.
−	*Green deal.	+	* Leadership in Energy and Environmental Design.
−	*Leadership in Energy and Environmental Design.	+	* Low-e glass.
−	*Low-e glass.	+	* Shading coefficient.
−	*Shading coefficient.	+	* Solar reflectance index.
−	*Solar reflectance index.	+	* Sustainability.
−	*Sustainability.	+	* Thermal bridge.
−	*Thermal bridge.	+	* U value.
−	*U value.	+	* Zero carbon homes.
−	*Zero carbon homes.	+	* Zero carbon non-domestic buildings.
−	*Zero carbon non-domestic buildings.	+

−	[[Category:Standards_/_measurements]]	+	[[Category:Standards_/_measurements]] [[Category:DCN_Standard]]

Designing Buildings at 09:49, 13 April 2015

2015-04-13T09:49:08Z

← Older revision		Revision as of 09:49, 13 April 2015
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	*g-value.		*g-value.
	*Green deal.		*Green deal.
−	*~~LEED~~.	+	*Leadership in Energy and Environmental Design.
	*Low-e glass.		*Low-e glass.
	*Shading coefficient.		*Shading coefficient.

Designing Buildings at 08:58, 2 August 2014

2014-08-02T08:58:05Z

← Older revision		Revision as of 08:58, 2 August 2014
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	*Low-e glass.		*Low-e glass.
	*Shading coefficient.		*Shading coefficient.
		+	*Solar reflectance index.
	*Sustainability.		*Sustainability.
	*Thermal bridge.		*Thermal bridge.

Designing Buildings at 15:39, 8 July 2014

2014-07-08T15:39:48Z

← Older revision		Revision as of 15:39, 8 July 2014
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	*Zero carbon non-domestic buildings.		*Zero carbon non-domestic buildings.

−	[[Category:~~Sustainability~~]]	+	[[Category:Standards_/_measurements]]

86.166.224.29 at 08:31, 3 January 2014

2014-01-03T08:31:45Z

← Older revision		Revision as of 08:31, 3 January 2014
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	However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.		However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.
		+
		+	Actual solar heat gain is dependent on the angle of incidence of solar radiation on the glazing (and so the proportion of diffuse and direct beam solar radiation) as well as the spectral make up of the solar radiation. However, as a simplified method, manufacturers will often only provide a spectrally-averaged solar heat gain coefficient for normally-incident solar radiation. Values for other angles of incidence and for diffuse solar radiation can then be estimated using standard equations or tables for similar windows.

	Solar heat gain coefficients, as with g-values can refer to the centre-of-glass SHGC or can relate to the entire window, including frame.		Solar heat gain coefficients, as with g-values can refer to the centre-of-glass SHGC or can relate to the entire window, including frame.

Designing Buildings at 13:56, 2 January 2014

2014-01-02T13:56:31Z

← Older revision		Revision as of 13:56, 2 January 2014
Line 15:		Line 15:
	*Computational fluid dynamics (CFD).		*Computational fluid dynamics (CFD).
	*Emission rates.		*Emission rates.
		+	*Emissivity.
	*Energy certificates.		*Energy certificates.
	*Environmental legislation.		*Environmental legislation.

Designing Buildings at 14:58, 20 December 2013

2013-12-20T14:58:09Z

← Older revision		Revision as of 14:58, 20 December 2013
Line 20:		Line 20:
	*Green deal.		*Green deal.
	*LEED.		*LEED.
		+	*Low-e glass.
	*Shading coefficient.		*Shading coefficient.
	*Sustainability.		*Sustainability.

Designing Buildings at 07:56, 17 December 2013

2013-12-17T07:56:37Z

← Older revision		Revision as of 07:56, 17 December 2013
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	Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.		Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.

−	The total solar heat transmittance through transparent and translucent materials is equal to the solar heat that is transmitted through the material directly, plus the solar heat that is absorbed by the material and then re-emitted into the enclosed space. Until recently this was expressed in terms of a shading coefficient which described the amount of solar heat transmitted through a material compared to the amount of solar heat transmitted through a standard sheet of clear float glass ~~3 to 4mm~~ thick.	+	The total solar heat transmittance through transparent and translucent materials is equal to the solar heat that is transmitted through the material directly, plus the solar heat that is absorbed by the material and then re-emitted into the enclosed space. Until recently this was expressed in terms of a shading coefficient which described the amount of solar heat transmitted through a material compared to the amount of solar heat transmitted through a standard sheet of clear float glass 3mm thick.

	However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.		However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.
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	=== Related articles in Designing Buildings Wiki ===		=== Related articles in Designing Buildings Wiki ===
−	*BREEAM.~~<br/>~~	+	*BREEAM.
	*Code for Sustainable Homes.		*Code for Sustainable Homes.
	*Computational fluid dynamics (CFD).		*Computational fluid dynamics (CFD).
Line 17:		Line 17:
	*Energy certificates.		*Energy certificates.
	*Environmental legislation.		*Environmental legislation.
		+	*g-value.
	*Green deal.		*Green deal.
−	*LEED.~~<br/>~~	+	*LEED.
−	*Shading coefficient.~~<br/>~~	+	*Shading coefficient.
−	*Sustainability.~~<br/>~~	+	*Sustainability.
	*Thermal bridge.		*Thermal bridge.
	*U value.		*U value.

Designing Buildings at 06:45, 17 December 2013

2013-12-17T06:45:34Z

← Older revision		Revision as of 06:45, 17 December 2013
Line 2:		Line 2:
	Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.		Understanding the solar transmittance through translucent and transparent materials such as glass is important for determining the solar heat gain into the space they enclose during sunny conditions. Solar heat gain can be beneficial in the winter, as it reduces the need for heating, but in the summer can cause overheating.

−	The total solar heat transmittance through transparent and translucent materials is equal to the solar heat that is transmitted through the material directly, plus the solar heat that is absorbed by the material and then re-emitted into the enclosed space. Until recently this was expressed in terms of a shading coefficient which described the amount of solar heat ~~that~~ through a material compared to the amount of solar heat ~~hrough a sheet of clear float glass with a total solar heat transmittance of 0.87 (ie~~ a sheet of clear float glass 3 to 4mm thick).	+	The total solar heat transmittance through transparent and translucent materials is equal to the solar heat that is transmitted through the material directly, plus the solar heat that is absorbed by the material and then re-emitted into the enclosed space. Until recently this was expressed in terms of a shading coefficient which described the amount of solar heat transmitted through a material compared to the amount of solar heat transmitted through a standard sheet of clear float glass 3 to 4mm thick.

	However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.		However, manufacturers are now moving away from shading coefficients. In the USA, they are moving towards the use of solar heat gain coefficients (SHGC) and in Europe, window solar factors or g-values. In essence, these both represent the fraction of incident solar radiation transmitted by a window, expressed as a number between 1 and 0, where 1 indicates the maximum possible solar heat gain, and zero, no solar heat gain. The difference between US and European systems is that they use a different value for air mass.