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Topic: Solar gain

	Arizona Solar Center > Solar Architecture > Passive Solar Heating & Cooling Manual - Page 2 of 4 (Site not responding. Last check: 2007-11-07)
		Adjustments in glazing size and location of solar windows can occur by the use of reflectors, or when other passive solar design elements are used in combination with a direct gain system such as heat loss reduction by the use of movable insulation, double glazing, and by using wooden sash and frames.
		Thermal storage masses in direct gain designs must receive direct sunlight impact, and the farther away from the collecting surface they are, the taller the collecting surface (glazing) must be in order to have sufficient surface solar contact because of the sun's angle.
		Skylights provide an alternative for direct solar gain, shading devices must be included as an integral part of the skylight to prevent overheating the space during mild periods.
	www.azsolarcenter.com /design/pas-2.html (8428 words)

	Principles of Solar Cooker Design
		A solar box cooks because the interior of the box is heated by the energy of the sun.
		This heat input causes the temperature inside of the solar box cooker to rise until the heat loss of the cooker is equal to the solar heat gain.
		Critical to solar cooker performance, the heat that is collected by the dark metal absorber plate and pots is conducted through those materials to heat and cook the food.
	www.solarcooking.org /sbcdes.htm (1006 words)

	Architecture Solar Virtual Reality Native American Archaeology
		Solar radiation, mostly the visible light spectrum, passes through the solar-oriented glass of windows or solar spaces, and is absorbed by surfaces of materials inside the insulated envelope of the building.
		The direct gain solarium (otherwise known as a solar greenhouse or sunspace) is similar in concept to teh direct-gain window, and the same orientation rules of thumb apply.
		Solar heat is trapped between the masonry and the glass; it enters the house by migrating through the masonry.
	www.dennisrhollowayarchitect.com /html/SolarDesignb.html (6096 words)

	Solar Energy Technologies Program: Solar Space Heating and Cooling
		Passive solar space heating takes advantage of warmth from the sun through design features, such as large south-facing windows, and materials in the floors or walls that absorb warmth during the day and release that warmth at night when it is needed most.
		Solar space heating systems operate in much the same way as indirect solar water-heating systems, but they have a larger collector area, larger storage units, and more complex control systems.
		Solar ventilation air preheating systems are generally used in commercial and industrial applications that require large quantities of ventilation air, including: a) buildings that require much outdoor ventilation, such as warehouses, large manufacturing plants, and airplane maintenance hangars; b) crop drying; and c) pre-heatingof boiler combustion air.
	www1.eere.energy.gov /solar/sh_basics_space.html (877 words)

	Solar gain - Wikipedia, the free encyclopedia
		Solar gain (also known as solar heat gain or passive solar gain) refers to the increase in temperature in a space, object or structure that results from solar radiation.
		This effect, the greenhouse effect, so called due to the solar gain that is experience behind the glass of a greenhouse, has since become well known in the context of global warming.
		In the context of passive solar building design the aim of the designer is normally to maximise solar gain within the building in the winter (to reduce space heating demand), and to control it in summer (to minimise cooling requirements).
	en.wikipedia.org /wiki/Solar_gain (312 words)

	Passive solar building design - Wikipedia, the free encyclopedia
		Indirect gain, in which solar radiation is captured by a part of the building envelope designed with an appropriate thermal mass (such as a water tank or a solid concrete or masonry wall behind glass).
		Although not classified as a passive solar technology, the use of thermal insulation or superinsulation is invariably employed to reduce heat loss or unwanted heat gain.
		Despite this lack of general enthusiasm, passive solar technologies were refined and developed during the 20th century, boosted a little by the 1973 oil crisis, and their application has been aided by the development of computer modelling techniques and a number of pioneering passive solar buildings.
	en.wikipedia.org /wiki/Solar_design (1342 words)

	The good, the bad and the ugly
		The first problem is that for there to be a significant temperature gain from the solar unit, the water in the existing water heater must be cold when the sun is shinning which is ridiculous and just unacceptable to most people.
		It is a phenomenon of all solar collectors, especially the flat plate type, that the efficiency goes down as the temperature difference between the fluid being circulated and the ambient air goes up.
		On the Solar Patriot the water coming from the solar collector goes directly to the 12- gallon tank where it is mixed before it is circulated to the rest of the system.
	www.btfsolar.com /whatworks.htm (1860 words)

	Generating Solar Data
		The solar tables presented here cover three solar technologies: photovoltaic electricity generation, solar thermal for domestic heat and hot water, and solar gain through windows.
		The methodology to calculate solar radiation impinging upon an arbitrarily oriented window is similar to that included in the PV simulation program [2].
		The reported solar a gain assumes a shading coefficient of 12% at normal solar incidence.
	www.energy.iastate.edu /renewable/solar/gen-index.html (879 words)

	PASSIVE SOLAR ENERGY DESIGN
		Although passive solar heating systems do not require mechanical equipment for operation, this does not mean that fans or blowers may not, or should not, be used to assist the natural flow of thermal energy.
		An indirect gain passive solar heating system (also called a Trombe wall or a thermal storage wall) is a south-facing glazed wall, usually built of heavy masonry, but sometimes using containers of water or phase change materials.
		Passive solar heating will tend to work best, and be most economical, in climates with clear skies during the winter heating season and where alternative heating sources are relatively expensive.
	www.ecomall.com /greenshopping/passivesolar.htm (1950 words)

	Solar Hot Water Systems by Solar Solutions Australia's hot water specialist (Site not responding. Last check: 2007-11-07)
		Solar hot water heat is generated by passing fluid through a series of copper tubes in the solar collector.
		Solar gain is the process of capturing the suns energy (ultra violet radiation) and converting it to infra red light.
		Solar collectors absorb the infra-red light and as the fluid passes that energy is absorbed as heat.
	www.solarsolutions.net.au /aboutsolarhotwater.htm (399 words)

	EDTM - Solar Heat Gain Low E Coating Detector with SHGC Indication for Single or Dual Pane - AE4600 User Manual (Site not responding. Last check: 2007-11-07)
		The DIGITAL Solar Gain Low E Detector simultaneously identifies the location of Low E coatings on residential windows and also identifies the solar gain performance category of the coating.
		The solar gain performance technology uses a reflection principle to identify the solar gain category the window belongs to.
		It is preferred to allow high amounts of solar energy to pass through the windows (high solar gain) in the winter months to offset the cost of heating a home.
	www.solarstop.net /edtm/usermanuals_AE4600.htm (1873 words)

	COLORADO RENEWABLE ENERGY SOCIETY - Solar Technologies
		Solar PV concentrators are designed to focus sunlight onto a small space and generate power with greater efficiency.
		Solar thermal systems are composed of two main parts - a solar collector and a storage tank.
		Solar thermal systems can be either active or passive, but most are active systems.
	www.cres-energy.org /techbasics/solar_div1.html (856 words)

	Solarsense – solar hotwater systems
		Indirect solar systems are installed to take maximum advantage of high grade solar gain in summer and the low grade solar gain available in the winter months.
		The vacuum tube solar system is a neat, single panel (looking similar to a Velux roof light) unlike the large, old panels you may see on existing roofs.
		With the Government showing its commitment to solar power by reducing V.A.T. to only 5% and providing a £400 grant for all homeowners, a strong incentive for a solar thermal installation is given.
	www.solarsense-uk.com /pages/system.html (688 words)

	Cooling with Solar Heat: Growing Interest in Solar Air Conditioning
		Solar energy can easily be used in the form of vacuum tube or flat plate collectors.
		Although over 20 systems that use thermal solar energy to air condition buildings and that can be technically and economically assessed have been installed in Germany, there are still a number of obstacles to be overcome when it comes to the implementation of solar-assisted air conditioning.
		Because solar cooling is based on thermally driven processes instead of the normal electrical cold production, the costs for the used heat plays a central role: a fundamental problem arises from the inherently higher costs of solar heat compared to heat energy produced by fossil fuel systems or waste heat.
	www.solarserver.de /solarmagazin/artikeljuni2002-e.html (2159 words)

	Welcome To Home Energy Magazine Online
		While many of the big advances in solar technology have been in off-the-grid applications, innovative passive solar ideas and technologies are also available for the average residence.
		Four major elements of solar design are visible in this interior view: a poured concrete floor designed for thermal mass (in winter it stores heat radiating through the wall of windows), an exterior trellis and projections for summer shading, extensive daylighting, and operable windows for venting excess heat and providing fresh air.
		Just as you design the home to optimize solar heating, design it for maximum solar lighting by increasing the number of windows that would let natural light into rooms that are used during the day.
	www.homeenergy.org /archive/hem.dis.anl.gov/eehem/97/970508.html (4896 words)

	Solar Energy and Home Design
		All incorporate passive solar heating and cooling, most include active solar thermal systems and many obtain their electricity from solar panels or photovoltaics.
		A roof-integrated array of solar thermal collectors works together with generous passive solar gain, a super-insulated envelope, earth-sheltering and internal thermal mass to keep the house comfortably warm even when winter temperatures plunge to 35 below.
		While these solar residences achieved thermal self-sufficiency, they were still dependent on conventional sources for their electricity.
	www.solardesign.com /solar-homes.html (464 words)

	Solar Cooking
		Introducing these people to solar cooking is a good way to show them that they can integrate alternative energy into their lives.
		Solar cooking and drying clothes outside on a line are the simplest, least expensive ways to use solar energy to offset some of this high energy consumption.
		Food just takes longer in most solar cookers, but since the sun is shining directly on the lid of the pot, the food browns just about as well as in a conventional oven.
	mickiesplace.com /solarcooking.htm (3291 words)

	Skylight Well Reduces Solar Heat Gain
		It is well known that daylight is rapidly attenuated as it is reflected, multiply and diffusely, while passing through a skylight well that has a depth comparable to, or greater than, the size of its opening.
		Further research is needed to develop a method of calculating the trapped heat and the expected temperatures from the well geometry and incident solar flux on the skylight.
		Solar energy absorbed in the well walls causes vertical temperature stratification in the well, resulting in an air temperature (upper plot) at the top of the well that is always above outdoor air temperature.
	eetd.lbl.gov /newsletter/nl10/skylight.html (642 words)

	Direct Solar Gain
		Some types of passive solar systems are called direct gain systems when they use the sun's heat without interference, and when the heat collection, storage and distribution all occur within the same space.
		A direct gain system includes south-facing windows and a large mass placed within the space to receive the most direct sunlight in cold weather and the least direct sunlight in hot weather.
		For winter, the mass absorbs solar heat during its exposure to direct sunlight and radiates that heat back into the space during the cooler night.
	www.consumerenergycenter.org /home/construction/solardesign/direct.html (194 words)

	Energy - Solar Heat Gain Control for Windows
		The Solar Heat Gain Coefficient (SHGC) is the fraction of solar heat that enters the window and becomes heat.
		The lower the SHGC, the less solar heat that the window transmits through the glazing from the exterior to the interior, and the greater its shading ability.
		In general, South facing windows in houses designed for passive solar heating (with a roof overhang to shade them in the summer) should have windows with high a SHGC to allow in beneficial solar heat gain in the winter.
	www.lowes.com /lowes/lkn?action=pg&p=/Energy/conserv_solarheatgain.html&rn=RightNavFiles/rightNavEnergy (1608 words)

	Passive solar - Wikipedia, the free encyclopedia (via CobWeb/3.1 planetlab1.tamu.edu) (Site not responding. Last check: 2007-11-07)
		Passive solar is a term referring to those technologies that can be employed to convert sunlight into usable heat, to cause air-movement for ventilation or cooling, or to store the heat for future use, without the use of much or any electrical or mechanical equipment.
		Passive solar technologies include direct gain and indirect gain for space heating, solar water heating systems based on the thermosiphon, use of thermal mass and phase-change materials for dampening indoor air temperature swings, solar cookers, the solar chimney for enhancing natural ventilation, and earth sheltering.
		More widely, passive solar includes technologies such as the solar furnace and solar forge, but these typically require some external energy for aligning their concentrating mirrors or receivers, and historically have not proven to be practical or cost effective for wide-spread use.
	en.wikipedia.org.cob-web.org:8888 /wiki/Passive_solar (356 words)

	solar gain - accumulo termico (English to Italian translation glossary) Architecture/Tech,Energy / Power ...
		"Because of the proportionally high solar gain over the two facades of the building, a supporting ventilation system was added".
		Solar Gain - The amount of energy that a building absorbs due to solar energy striking its exterior and conducting to the interior or passing through windows and being absorbed by materials in the building.
		The heat gained in a building due to sunlight, principally that entering through windows.
	www.proz.com /kudoz/359405 (488 words)

	Brooks Solar - Passive solar design consulting
		This allows maximum solar gain through south facing windows, and can include a large south facing roof surface for solar hot water and photovoltaic arrays.
		Exterior shades are more effective than interior shades because they stop solar gain before it enters the structure.
		When building a new home, make it "solar ready" by pre-plumbing for a future solar hot water system, and placing conduit for a future photovoltaic system.
	www.brookssolar.com /passiveSolar.asp (400 words)

	The Hodges Passive Solar Home in Ames, Iowa
		The components of the direct gain passive solar space heating system of the Hodges Residence are just the south glazing and the concrete floors and walls of the building.
		The useful solar heat received during an average heating season is about 50 to 60 GJ (50 to 60 million Btu); "useful" in this sense refers to useful in providing heat to the interior of the home at times when it contributes to increased environmental comfort for the occupants.
		There are a surprising number of homes in Iowa which were built from passive solar home plans but faced in a direction other than south in order to take advantage of a good view; the homeowners liked the design and felt it was affordable, but are not securing the design's energy advantages.
	www.public.iastate.edu /~lhodges/house.htm (4530 words)

	Solar Maus, Inc. (Site not responding. Last check: 2007-11-07)
		A far easier way is to use the solar rays the sun produces and capture them to heat your home.
		Controlling the gain from the sun is another matter.
		Solar energy and solar heating will be our future.
	www.solarmaus.com (229 words)

	Passive Solar Design
		Direct Gain is radiant heat resulting from sunlight admitted directly to the living spaces through south-facing windows, which warms the interior surfaces (walls, furniture, floors, etc.).
		For direct gain, the south-facing window area must be sized for the climate, the type of window used and the amount of thermal mass in the home.
		Passive solar design works by utilizing overhangs to shade a house during the heat of the summer and allow sunlight to penetrate the interior of the house during the winter.
	www.nesea.org /buildings/passive.html (1392 words)

	Climate, Solar Gain and Comfort
		In addition to solar heat gain through glazing (Qs=AI), heat gain by occupants and equipment, solar thermal conduction through opaque elements in hot climates is particularly importance.
		Remember, in a heat gain situation, with strong solar radiation, it is the sol-air temperature value which must be used to find the temperature difference, thus even if the air temperature difference is small, the actual temperature difference acting as a motive force for heat flow may be large, consequently insulation may be important i.e.
		By far the greatest contribution to solar gain is from openings and particularly windows (greenhouse effect).
	www.netcentral.co.uk /eclectic/eecoenv/lecture1.html (1695 words)

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