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	DOE Building Technologies Program: Active Solar And Photovoltaic Systems
		Active solar energy systems should be integrated with a building's design and systems only after passive solar and energy-conserving strategies are considered.
		An active solar water heating system can be designed with components sized large enough to provide heating for pools or to provide a combined function of both domestic water and space heating.
		Active solar space-heating systems generally are not operating year-round, so their moving parts must be reliable enough to work intermittently.
	www.eere.energy.gov /buildings/info/design/integratedbuilding/activesolar (964 words)

	Passive & active solar architecture
		The rudiments of solar passive design were developed and used through the centuries by many civilisations across the globe; in fact, many of these early civilisations built dwellings that were better suited to their climatic surroundings than those built today in most developed and developing countries.
		Active cooling systems of solar cooling such as evaporative cooling through roof spray and roof pond and desiccant cooling systems have been developed alongwith experimental stratergies like earth-cooling tubes and earth-sheltered buildings.
		Active solar systems use solar panels for heat collection and electrically driven pumps or fans to transport the heat or cold to the required spaces.
	mhathwar.tripod.com /thesis/solar/solar_architecture.htm (2031 words)

	[No title]
		The solar corona material is massive in size (they can occupy up to a quarter of the solar limb), and frequently accompanied by the remnants of an eruptive prominence, and less often by a strong solar flare.
		Sunspots and faculae are observed in the photosphere.
		The earlier spots in the solar cycle appear at higher latitudes and the later spots in the solar cycle emerge nearer to the equator.
	solar-center.stanford.edu /gloss.html (2724 words)

	Solar Hot Water Heaters
		Solar energy is radiant energy that is conveyed from the sun to the earth through electromagnetic waves.
		Solar collectors are mounted either on the roof of a building or on the ground close by.
		Active solar water heaters are forced circulation systems that use a pump to move the heat-transfer fluid, while passive hot water systems rely on gravity and do not utilize a pump for circulating the heat-transfer liquid.
	www.hvacmechanic.com /heating/solar_hot_water_heaters.htm (2764 words)

	Active solar - Wikipedia, the free encyclopedia
		Active solar is a term referring to those technologies that can be employed to convert solar energy into usable heat, to cause air-movement for ventilation or cooling, or to store the heat for future use, and which use electrical or mechanical equipment, such as pumps and fans, to facilitate this.
		Solar water heating systems, except those based on the thermosiphon, use pumps or fans to circulate water, an anti-freeze mixture, or air through solar collectors, and are therefore classified under active solar technology.
		Solar trackers, sometimes also used to orient photovoltaic arrays, may be driven by either passive or active technology.
	en.wikipedia.org /wiki/Active_solar (314 words)

	Active Solar System Construction Project Management Philadelphia Pa
		Major components of a active solar system include collectors, the circulation system that moves the fluid between the collectors and storage, the storage tank, a control system, and a backup heating system.
		An active solar system water heating can be designed with components sized large enough to provide heating for pools or to provide a combined function of both domestic water and space heating.
		Active solar space-heating systems generally are not operating year-round, so their moving parts must be reliable enough to work intermittently.
	www.aetglobal.com /active_solar_systems.htm (997 words)

	NC Solar Tax Credits
		Solar energy property is equipment that uses solar energy to heat or cool a building and provide hot water or electricity for use within or offset loads associated with the building.
		Solar collection must be designed so as not to cause additional heat gain to the conditioned area of the building in the summer.
		Solar radiation is absorbed by the wall, converted to heat and transferred to the building by convection, radiation or combination thereof.
	www.scsolar.com /ncsolartaxcredits.html (2896 words)

	Sourcebook: Solar Hot Water, Heating and Cooling Systems
		Solar installations are governed by City Ordinance 900104-J. This ordinance follows the 1988 Uniform Solar Energy Code established by IAPMO (International Association of Plumbing and Mechanical Officials).
		The active solar space heating system can use the same operational components as the domestic water heating systems, but ties into a heating distribution system that can use heated fluids as a heat source.
		A passive solar water heating system uses natural convection or household water pressure to circulate water through a solar collector to a storage tank or to the point of use.
	www.greenbuilder.com /sourcebook/HeatCool.html (3452 words)

	EERE Consumer's Guide: Active Solar Heating
		There are two basic types of active solar heating systems based on the type of fluid—either liquid or air—that is heated in the solar energy collectors.
		Active solar heating systems are most cost-effective when they are used for most of the year, that is, in cold climates with good solar resources.
		A solar heating system will also reduce the amount of air pollution and greenhouse gases that result from your use of fossil fuels such as oil, propane, and natural gas for heating or that may be used to generate the electricity that you use.
	www.eere.energy.gov /consumer/your_home/space_heating_cooling/index.cfm/mytopic=12490 (1276 words)

	Information on Solar Energy systems Types,solar energy,photovoltaic,solar panels,inverters,batteries
		Active solar energy systems are used to provide heat for thermal comfort in buildings (space heating) and water heating.
		Residential water heating is the most common application for active systems, but they are also effective for heating larger volumes of water for commercial purposes, such as for car washes, beauty salons, public health facilities, and even swimming pools.
		Active systems use mechanical equipment such as pumps and fans to regulate and distribute the energy collected from the sun.
	www.oksolar.com /technical/types_info.html (972 words)

	Active solar
		Active solar technologies usually consist of a solar collecting device that is designed to capture the sun’s energy; it can be used to store or transfer heat energy in water or air.
		Solar collectors are securely attached to some convenient part of the house so that they face south, towards the sun and are tilted from the horizontal between 10° and 60°.
		Solar Water Collectors are located outside the house and have to be designed to last for many years, it is important that the materials used in their construction are durable and compatible with the rest of the plumbing.
	www.esru.strath.ac.uk /EandE/Web_sites/01-02/RE_info/active_solar.htm (2525 words)

	SolarPower
		In other words, a house is typically built for solar energy via overall orientation and the construction of large skylights and other south facing windows, enhanced by efficient insulation(this is not always the case though, and passive solar features can be added onto a building).
		Active solar, on the other hand, utilizes solar electric technologies such as photovoltaic cells to convert sunlight into energy.
		Because passive and active solar both look to the sun for power, both share the same free, renewable source and costs are therefore in the installation and maintenance.
	cr.middlebury.edu /es/altenergylife/solarpower.htm (955 words)

	Active solar Summary
		The projected costs of base-load solar power using ground-based solar arrays are clearly dominated by the cost of the energy storage system needed to allow energy received during a clear day to be delivered to customers at night—or during several consecutive days of cloudy weather.
		Active solar is the use of solar energy to "actively" convert the energy in sunlight into other forms.
		Active thermal solar panels use a heat transfer fluid (water or antifreeze solution) are heated by the sun and fans or pumps are used to circulate the air or the heat absorbing fluid for building heating (or domestic hot water or other uses).
	www.bookrags.com /Active_solar (1349 words)

	Active vs. Passive Solar
		A passive solar home is a solar collector by it very design.
		Active Solar - An active solar home has solar collectors and a heat storage area.
		Below are some pictures of an active solar home in the the area.
	users.chartertn.net /dhrivnak/active_vs__passive.htm (542 words)

	Passive Solar Water Heaters
		Active systems are more flexible in their orientation, since the hot water storage tank does not have to be near the solar collector, and they can operate year round without the chance of freezing.
		However, passive solar heaters are equally reliable, less expensive to purchase and operate, more energy efficient, and require less maintenance than active systems because of their lack of moving parts.
		To begin with, the solar collectors for each of the two types of heaters must be south facing, and adequate levels of sunlight are essential for heating, especially between 9:00 am and 4:00 pm.
	www.humboldt.edu /~bae7/solarpage.htm (858 words)

	Current Solar Forecast
		Analysis of Solar Active Regions and Activity from 28/2100Z to 29/2100Z: Solar activity was very low.
		Solar Activity Forecast: Solar activity is expected to remain very low.
		Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled with a slight chance for an isolated active period on day one (October 30).
	www.sec.noaa.gov /forecast.html (220 words)

	Active Solar Water Heating Systems
		An active system is one where the exchange fluid is actively pumped from the storage tank through the collectors and back into the tank.
		And the installation of a solar energy powered hot water heater in a million dollar Street of Dreams home at Phillips Landing in southwest Orlando recently is a clear signal that both builders and consumers are beginning to accept solar energy as a "mainstream" resource.
		Solar water heaters, according to the Code, take between 15 and 20 points off the total energy tally – -a significant reduction that not only cuts a home's overall energy "drain", but reduces fuel costs as well.
	www.flasolar.com /active_dhw.htm (685 words)

	Solar Heating Systems
		The main components of a solar heating system are the solar collectors for collecting solar radiation, the solar storage system for storing the heat, and heat exchangers for distributing the heat throughout the building.
		Solar collectors are arranged in banks and must be positioned properly to maximize the radiation that is collected.
		Air in the air-based solar heating system (Figure 8) is pulled through the collector, preheat tank heat exchanger, and damper A. Dampers are used in a ductline to stop or redirect airflow in the duct, just as valves are used in piping to stop water flow.
	home.earthlink.net /~jschwytzer/solar.html (1890 words)

	how solar hot water systems work
		Flat plate solar collectors ("solar panels") are a key component of active solar systems because the require constant flow of fluid through the panels.
		The solar storage tank connects to the existing hot water heater and feeds the preheated solar water into the gas or electric hot water heater as hot water is used.
		The solar collectors and feed lines are protected from freezing by automatic drain down controls which allows the water in the pipes and panels to fall safely back out of the solar collectors and feed pipes.
	www.kingsolar.com /howdhwworks.html (1348 words)

	Active Solar
		An Active Solar HVAC System consists of a number of collectors that use the sun as its primary source of energy.
		Solar radiation is transmitted thru the outer, transparent tube.
		The active solar system uses ductwork or piping to distribute the heated air of liquid to its final destination.
	www.pages.drexel.edu /~ank24/AE390/a5/aboutme.htm (913 words)

	KingSolar.com: Active solar water heating systems (Site not responding. Last check: 2007-10-29)
		Active solar heating is a little more complicated than passive systems, but increasingly easier to operate.
		The "fins" increase the absorption of the solar rays, transferring more heat into the water or various kinds of solar fluids that can be circulated through the riser tubes.
		The solar absorber plate is then installed in an aluminum framed box surrounded on the bottom and sides with insulation and covered with tempered glass.
	kingsolar.com /catalog/dept/solar-heating/activesystems.htm (267 words)

	Solar Energy
		Unlike a passive solar home, an active solar home uses mechanical equipment, such as pumps and blowers, and an outside source of energy to help heat the house when solar energy is not enough.
		Solar heating systems must have some way to store the heat that is collected on sunny days to keep people warm at night or on cloudy days.
		Houses with active or passive solar heating systems may also have furnaces, wood-burning stoves, or another heat source to provide heat in case there is a long period of cold or cloudy weather.
	lsa.colorado.edu /summarystreet/texts/solar.htm (2235 words)

	BuildingGreen.com - Sustainable System Design - Hartland Cohousing Project
		When the load of the house can be reduced so much with SI and active solar, then it is possible to get some upfront savings by eliminating any combustion equipment and fuel storage, and providing the small amount of heat required with electric resistance heat.
		In an active solar system, the lower the usable water temperature, the more efficient the system is, so much more usable heat can be produced by the same size collector.
		I propose an active solar system in which there is a site-built collector on the roof, and a wall or walls on the main building level which is a radiant massive wall, probably 12-16 inches thick and faced with stone or tile or brick or plastered.
	www.buildinggreen.com /features/mr/hartland2.cfm (1360 words)

	Solar Basics
		Active Systems require a pump to circulate the water from the solar storage tank through the collectors.
		There are two general categories of active solar water heating system – open loop and closed loop systems.
		In these types of systems the water stored in the solar storage tank is circulated directly through the solar collectors where it is heated and returned to the storage tank.
	www.aetsolar.com /Solar_Residential_Commercial/Solar_Basics.html (801 words)

	Solar Terrestrial Activity Report
		Solar wind speed ranged between 309 and 574 km/s (average speed was 389 km/s, increasing 79 km/s over the previous day) under the influence of a high speed stream from CH295.
		Solar flux measured at 20h UTC on 2.8 GHz was 68.2.
		Quiet to active conditions are likely on October 20-21 due to a high speed stream from CH295.
	www.dxlc.com /solar (668 words)

	Active Solar Heating.
		Active Solar Heating systems are most commonly used to supply domestic hot water for washing and heating.
		A collector array (absorber) is mounted on the roof which soaks-up the sun's radiation and increases in temperature, this heats a fluid circulated between the absorber and the water tank, thus heating the water.
		The UK sits on a northern latitude, which means we receive roughly half the amount of solar energy as some of the sunnier climbs of the world.
	eeru.open.ac.uk /greenenergy/active_solar_heating.htm (189 words)

	Tech Set 6: The Sun in the 21st Century Home
		Active solar panels are typically mounted flush with the roofline to reduce the visual impact.
		Installing solar thermal or PV panels on a roof will require an analysis of the design load of the roof and the weight of the equipment that will be installed.
		A solar water heating system usually consists of a hot water storage tank, a solar collector that absorbs solar energy (often mounted flush to the roof), and (for forced circulation systems) a pump and controls.
	www.toolbase.org /TechSets/solar-home (1264 words)

	~ Active Solar ~
		Active solar systems consist of collectors that collect solar radiation and electric fans or pumps to distribute heat from the collectors.
		Active solar technologies usually consist of a solar collecting device that is designed to capture the sun’s energy; it can be used to store or transfer heat energy in water or air.
		Unlike passive solar technologies there is usually a moving part of the system involved with active solar technologies hence the word – active – usually a pump type device...
	www.ssrsi.org /sr2/Heat/active.htm (2330 words)

	Photovoltaics - Wikipedia, the free encyclopedia
		Solar cells produce direct current electricity from the sun’s rays, which can be used to power equipment or to recharge a battery.
		Such solar arrays have been used to power orbiting satellites and other spacecraft and in remote areas as a source of power for applications such as roadside emergency telephones, remote sensing, and cathodic protection of pipelines.
		Solar arrays are increasingly incorporated into new domestic and industrial buildings as a principal or ancillary source of electrical power.
	en.wikipedia.org /wiki/Photovoltaics (2465 words)

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