Solar heating solutions

  • View
    612

  • Download
    4

Embed Size (px)

DESCRIPTION

Starsight: http://starsightproject.com

Text of Solar heating solutions

  • 1.STARSIGHT POWERTECH solar water heating systemsWednesday, 27 January 2010

2. Solar water heating systems can be used effectively throughout Europe at residences and facilitiesthat have an appropriate near-south-facing roof or nearby unshaded grounds for installation of acollector. They are most cost-effective for facilities with the following characteristics: Water heating load that is constant throughout the year (not vacant in summer); Water heating load is constant throughout the week (to utilize solar heat every day), a sunny climate helps but is not requiredCost of fuel used to heat water is high (more than $10/Mmbtu or 40.034/kWh), such as electricity, which represents 46% of the water heating market, or propane which represents 2% of the market in remote locations;Low running cost with excellent product control and quality material selection y.gaillac@starsightproject.com mob: +44 7968 761 952 www/starsightproject.com , 21 a Penn Road, London N7 9RD United KingdomWednesday, 27 January 2010 3. StarSight International Ltd and Powertech Solar Ltd combined experience in the solar energies will guarantee for your optimum solar thermal project s success. To operate effectively we assist our clients with:Customized technology and exible applicationProduction & planning quality controlSkills transfer for implementation & maintenance trainingLocal job creation with manufacturing some parts on site y.gaillac@starsightproject.com mob: +44 7968 761 952 www/starsightproject.com , 21 a Penn Road, London N7 9RD United KingdomWednesday, 27 January 2010 4. Various solutions for solar water heatingThe SolarthermixTM Kit Single Flat Plate, Closed-Loop Pressure Kitwith Electronic NRV using Stainless Steelusing Flexible Stainless Steel Sensor 1 AA 22mm Copper Automaticto SS Fitting Air VentAA x S/S Corrugated Sleeving H corrugatedSensor 1 sleeving to cover G Roof Flashing insulated SS pipe I Insulation Re: Thermostatic R S1 Sensor wireG Roof Flashing Temp Control Valve Please note: Flexible Although a K Stainless Steel Thermostatic Pipe withControl Valve isSolar insulationnot part of theP 5A Fused Spur Controller I InsulationSwitch 123this Kit, it is S Krecommended thatyou install one.CorrugatedRe: ElectronicSleevingNRVK End cap Please note: TheWaterElectronic NRV andTankthe pump are to be wired together on BB SS to 15mm Fitting the sameWater TankQ connection at theG Roof FlashingW Filling LoopSolar controller B SolarthermixValve T Flow Setter DD15mm ball a fix valvePRV N LAA22mm CopperElectronicto SS Fitting NRV Bronze Pump ExpansionUBB 15mm Copper Vessel X 15mm Equal (with valves)to SS FittingTee E5A Fused Spur R C Drain Off ASwitch Air VentD CCRe: ThermostaticP123S15mm GateRe: Hydroflow Re: Thermostatic ValveF 22mm xRe: HydroflowControl ValvePlease note: Control Valve Solar15mm ReducerPlease note:Please note:Sensor 3 A HydroflowPlease note: Controller A Hydroflow Although a Sensor 3 must be installed Although amust be installed ThermostaticT failure to do so ThermostaticQ Flow Setter failure to do so Control Valve iscould render anyControl Valve iscould render anynot part of the guarantees/ not part of the guarantees/ Solarthermix Kit, itwarrantees Solarthermix Kit, it V Pump warranteesis recommended thatHotnull & void. is recommended that(with valves) null & void.you install one. Water you install one. FlowDirection ServicesSensor 2 Non Return Valve Hot Water Services M with 1 x 15mm MIand 1 x 22mmx MISensor 2This schematic shows the components that make up a Solarthermix Kit cylinder excluded. It is not to be relied This schematic shows the components that make up a Pressure Kit (Closed Loop) cylinder excluded. It is noton as an installation manual please refer to the Solarthermix Connection Procedures instead.e&oeto be relied on as an installation manual and is not drawn to scale.e&oePowertech Solar Ltd, 86 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset, BH21 7PQ PSLKit_Solarthermix withT 01202 890234 F 01202 876252 E sales@solar.org.uk W www.powertech-solar.comelectronic NRV 080908 y.gaillac@starsightproject.com mob: +44 7968 761 952 www/starsightproject.com , 21 a Penn Road, London N7 9RD United Kingdom Powertech Solar Ltd 2008Wednesday, 27 January 2010 5. Close loop & open loop comparison! Insulated SSSensor 1Pipe AA 22mm x ! S/SG Roof FlashingI Insulation H Corrugat ed Sleeving! InsulatedSS Pipe K K K KIWaterTank BB ! SS to 15mm W FittingFilling LoopDD 15mm ball a fixPRVU Expansion X Vessel15mmREqual Tee 5A Fused Spur Switch CC P S12315mm Gate Solar ValveControllerSensor 3 QT FlowV SetterPump (with valves)! Non Return Valve M with 1 x 15mm m.iFlow and 1 x22mmx ! m.iDirection Closed loop Sensor 2Open loop K 20 pipe ties for insulated pipe runs U" Pressure Vessel 18litre includes mounting bracket orK" 20 pipe ties for insulated pipe runsU" Pressure Vessel 18litre includes mounting bracket or M Mechanical plate non return valve U" Pressure Vessel 25litre includes mounting bracket M" Mechanical plate non return valve U" Pressure Vessel 25litre includes mounting bracketwith 1x15mm x1/2mi and 1-22mm x 1/2m/I V" Steel Pump & Valveswith 1x15mm x1/2mi and 1-22mm x 1/2m/IV" Steel Pump & Valves P Switched Fuse Spur & Surface Box W" Filling Loop + Pressure Release Valve with GaugeP" Switched Fuse Spur & Surface BoxW" Filling Loop + Pressure Release Valve with Gauge X" 3- 15mm equal Tee Q" 3m of 3 core round cable (for wiring pump to solar collector) X" 3- 15mm equal Tee Q 3m of 3 core round cable (for wiring pump to solar AA" 2-22mm x ! SS R" 10m of 2 core wire in black colour (to extend sensor wire)AA" 2-22mm x ! SScollector) H" 1x 1000mm corrugated sleeving black or silver S" TDC3 Solar Controller H" 1x 1000mm corrugated sleeving black or silverR 10m of 2 core wire in black colour (to extend sensor G" Pair of roof flashingsT" 1-(wattflow)- Flow Setter G" Pair of roof flashings wire) I" Powerflex insulation 19mm x 15mm (bag of 20m) CC" 1-15mmGate Valve I" Powerflex insulation 19mm x 15mm (bag of 20m)S TDC3 Solar Controller BB 2- 15mm x !SSDD" 2-15mm ball a fixBB 2- 15mm x !SS T 1-(wattflow)- Flow Setter CC 1-15mmGate Valve DD 2-15mm ball a fixWednesday, 27 January 2010 6. Solar Water Heatersalso called solar domestic hot water systemscan be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel, sunshine, is free! Unlike the Passive systems which have no moving parts, the Active systems use electric pumps, valves, and controllers to circulate water or other heat-transfer fluids through the collectors. They can be more expensive than passive systems but can also be more efficient in certain situations. Active systems are usually easier to retrofit than passive systems because their storage tanks do not need to be installed above or close to the collectors. But because they use electricity, they will not function in a power outage. There are two types of Active Systems: Open-Loop and Closed-Loop. Open-Loop Active Systems - Direct Circulation Open Loop Systems are suitable for single application domestic hot water (DHW) systems, in mild and moderate climates where there is no risk of freezing. Pumps circulate household water through the collectors and into the home. They work well in climates where it rarely freezes. Recirculation systems are a specific type of open-loop system that provide freeze protection. They use the system pump to circulate warm water from storage tanks through collectors and exposed piping when temperatures approach freezing. Advantages of Open Loop It is the simplest and typically the least expensive active system to install. There is no heat exchanger, which allows efficient heat transfer directly to the water. The system operates at standard line pressure. It is simple to add capacity to the system if demand changes. The system integrates easily with existing systems. Disadvantages Open Loop Some stored heat can be lost when the system re-circulates. It does, however recirculate from the colder bottom of the tank and supply pipes, and there are minimal losses in the loop and none through the collector. The primary freeze protection needs electricity or battery back-up. y.gaillac@starsightproject.com mob: +44 7968 761 952 www/starsightproject.com , 21 a Penn Road, London N7 9RD United KingdomWednesday, 27 January 2010 7. Closed-Loop Active Systems - Indirect Circulation Suitable for single and multiple solar heating application systems, e.g. domestic solar water heating (single), solar water heating hot tub, solar swimming pool heating or solar space heating systems. Suitable for areas with questionable water quality and all climate conditions. Preferred option for extremely cold areas. Pumps circulate a non-freezing, heat-transfer fluid through the collectors and a heat exchanger. They are popular in climates prone to freezing temperatures. These systems pump heat-transfer fluids (usually a glycol-water antifreeze mixture) through collectors. Heat exchangers transfer the heat from the fluid to the household water stored in the tanks. Closed-loop glycol systems offer good freeze protection. However, the glycol must be checked each year and changed every 3 to 10 years, depending on glycol quality and system temperatures. Drain back systems use water as the heat-transfer fluid in the collector loop. A pump circulates the water through the collectors. The water drains by gravity to the storage tank and heat exchanger; there are no valves to fail. When the pumps are off, the collectors are empty, which assures freeze protection and also allows the system to turn off if the water in the storage tank becomes too hot. Advantages of a Closed Loop Closed Loop system allows simple switching between heat exchangers for multiple applications, as well as excellent freeze protection. Special solar domestic hot water tanks are available with internal heat excha