Solar heating solutions

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Solar heating solutions

  1. 1. STARSIGHT POWERTECH solar water heating systemsWednesday, 27 January 2010
  2. 2. Solar water heating systems can be used effectively throughout Europe at residences and facilities that have an appropriate near-south-facing roof or nearby unshaded grounds for installation of a collector. 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 required Cost 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. 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 flexible application Production & planning quality control Skills transfer for implementation & maintenance training Local 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. 4. Various solutions for solar water heating The SolarthermixTM Kit Single Flat Plate, Closed-Loop Pressure Kit with Electronic NRV using Stainless Steel using Flexible Stainless Steel Sensor 1 AA 22mm Copper Automatic to ½” SS Fitting Air Vent AA ¾” x ½ S/S Corrugated Sleeving H corrugated Sensor 1 sleeving to cover G Roof Flashing insulated ½” SS pipe I Insulation Re: Thermostatic R S1 Sensor wire G Roof Flashing Temp Control Valve Please note: ½” Flexible Although a K Stainless Steel Thermostatic Pipe with Control Valve is Solar insulation not part of the P 5A Fused Spur Controller I Insulation Switch 123 this Kit, it is S K recommended that you install one. Corrugated Re: Electronic Sleeving NRV K ¾” End cap Please note: The Water Electronic NRV and Tank the pump are to be wired together on BB ½” SS to 15mm Fitting the same Water Tank Q connection at the G Roof Flashing W Filling Loop Solar controller B Solarthermix Valve T Flow Setter DD 15mm ball a fix valve PRV N L AA 22mm Copper Electronic to ½” SS Fitting NRV Bronze Pump Expansion U BB 15mm Copper Vessel X 15mm Equal (with valves) to ½” SS Fitting Tee E 5A Fused Spur R C Drain Off A Switch Air Vent D CC Re: Thermostatic P 123 S 15mm Gate Re: Hydroflow Re: Thermostatic Valve F 22mm x Re: Hydroflow Control Valve Please note: Control Valve Solar 15mm Reducer Please note: Please note: Sensor 3 A Hydroflow Please note: Controller A Hydroflow Although a Sensor 3 must be installed – Although a must be installed – Thermostatic T failure to do so Thermostatic Q Flow Setter failure to do so Control Valve is could render any Control Valve is could render any not part of the guarantees/ not part of the guarantees/ Solarthermix Kit, it warrantees Solarthermix Kit, it V Pump warrantees is recommended that Hot null & void. is recommended that (with valves) null & void. you install one. Water you install one. Flow Direction Services Sensor 2 ½” Non Return Valve Hot Water Services M with 1 x 15mm MI and 1 x 22mmx ½” MI Sensor 2 This 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 not on as an installation manual – please refer to the Solarthermix Connection Procedures instead. e&oe to be relied on as an installation manual and is not drawn to scale. e&oe Powertech Solar Ltd, 86 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset, BH21 7PQ PSLKit_Solarthermix with   T – 01202 890234 F – 01202 876252 E – sales@solar.org.uk W – www.powertech-solar.com electronic 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 2008 Wednesday, 27 January 2010
  5. 5. Close loop & open loop comparison !” Insulated SS Sensor 1 Pipe AA 22mm x ! S/S G Roof Flashing I Insulation H Corrugat ed Sleeving !” Insulated SS Pipe K K K K I Water Tank BB !” SS to 15mm W Fitting Filling Loop DD 15mm ball a fix PRV U Expansion X Vessel 15mm R Equal Tee 5A Fused Spur Switch CC P S123 15mm Gate Solar Valve Controller Sensor 3 Q T Flow V Setter Pump (with valves) !” Non Return Valve M with 1 x 15mm m.i Flow and 1 x22mmx !” m.i Direction Closed loop Sensor 2 Open loop K● 20 pipe ties for insulated pipe runs U" Pressure Vessel 18litre includes mounting bracket or K" 20 pipe ties for insulated pipe runs U" 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 bracket with 1x15mm x1/2”mi and 1-22mm x 1/2”m/I V" Steel Pump & Valves with 1x15mm x1/2”mi and 1-22mm x 1/2”m/I V" Steel Pump & Valves P● Switched Fuse Spur & Surface Box W" Filling Loop + Pressure Release Valve with Gauge P" Switched Fuse Spur & Surface Box W" 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 !” SS collector) H" 1x 1000mm corrugated sleeving black or silver S" TDC3 Solar Controller H" 1x 1000mm corrugated sleeving black or silver R● 10m of 2 core wire in black colour (to extend sensor G" Pair of roof flashings T" 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 !”SS DD" 2-15mm ball a fix BB 2- 15mm x !”SS T● 1-(wattflow)- Flow Setter CC● 1-15mmGate Valve DD● 2-15mm ball a fixWednesday, 27 January 2010
  6. 6. Solar Water Heaters—also called solar domestic hot water systems—can 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. 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 exchangers (coils), with or without electric backup. Twin coil tanks are also available that allow surplus solar energy to be directed to spa, pool, floor etc. The top coil can also be connected to the house boiler as a DHW backup. No freeze sensors or drain down valves are necessary. Disadvantages of a Closed Loop It is generally more complicated than an open loop system, because either a tank with a heat exchange coil or an external heat exchanger is required. As a heat exchanger is required the collector loop will run at slightly higher temperatures than an open loop system. The collector loop needs to be pressurised. (8 -12 psi) The antifreeze may need to be recharged on a 3 to 5 year basis. Collector Types Both Closed-Loop and Open-Loop systems may use Flat Plate Collectors or Evacuated Tube Collectors: Flat-plate collector Glazed flat-plate collectors are insulated, weatherproofed boxes that contain a dark absorber plate under one or more glass or plastic (polymer) covers. Unglazed flat-plate collectors—typically used for solar pool heating—have a dark absorber plate, made of metal or polymer, without a cover or enclosure. Sun Earth Collector Gobi Collector Evacuated-tube solar collectors They feature parallel rows of transparent glass tubes. Each tube contains a glass outer tube and metal absorber tube attached to a fin. The fins coating absorbs solar energy but inhibits radiative heat loss. These collectors are used more frequently for commercial applications.Wednesday, 27 January 2010
  8. 8. 20 collector array for care home Sussex Nottingham Uni 058 Aluminum casing been prepared Order waiting to be packed in TaianWednesday, 27 January 2010
  9. 9. SYSTEM 1 PRODUCT DESCRIPTION PRICE The 150 liters retrofit system package excluding the tank £470.00 The 200 liters retrofit system package excluding the tank £645.80 The 300 liters retrofit system package excluding the tank £850.00 All our direct retrofit system had been installed into insulated copper open vented hot water tanks using a two way valve. This, the lowest system cost to gain from solar heat energy is only suited to homes that have hot water tanks not older than 10 years and insulated. The above 3 system packages are for open vented tanks and are protected from freezing through the solar controllers built in frost thermostat. This German programmer recognises through a sensor when the water inside the manifold drops below 5c, at this point the point switches on and sends a much lower temperature from the bottom of the water tank through the collector and back, until the manifold water temperature is back above 5c If a country suffers from power cuts, we can provide a UPS backup system, using a battery, or proceed to the following system package.Wednesday, 27 January 2010
  10. 10. SYSTEM 2 PRODUCT DESCRIPTION PRICE The 150 liters retrofit system package including the tank £770.00 The 200 liters retrofit system package including the tank £975.80 The 300 liters retrofit system package including the tank £1,350.00 These are priced using hot water cylinders manufactured in the UK Insulated open vented tanks made of copper The above system packages include pressurised closed loop kit, with the pump changed from bronze to steel (lower cost) and a litre of glycol as a protection against freezing. A saving of £60.00 could be made by making the solar system open vented using a small header tank of 10 litres to maintain the fluid in the system. When any type of solar water heating system is installed as a closed loop, pressurised system, the water in such a system will raise the water to a much higher temperature than open loop, vented to atmosphere. A none pressure system means no concerns about over heating or if the power fails or pump stops working. Also reduces call backs if a pressure gauge shows zero, meaning somewhere in the system the water pressure is lost.Wednesday, 27 January 2010
  11. 11. SYSTEM 3 PRODUCT DESCRIPTION PRICE The 150 liters retrofit system package including the tank £1,150.00 The 200 liters retrofit system package including the tank £1,523.80 The 300 liters retrofit system package including the tank £1,986.00 These are priced using hot water cylinders manufactured in the UK Insulated unvented pressurized tanks made of stainless steel The systems above including a new unvented top of the range indirect mains pressure tank, includes the closed loop system package for the solar side of the installation. Each tank also includes its own expansion kit and a heating element of 3kW. As with the vented indirect copper cylinder, this system can also be installed on the solar side as open loop, using a 10 liters header tank as feed and expansion and safetyWednesday, 27 January 2010

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