Hoval Solar Equipment. The complete solution for domestic hot water, space heating support and swimming pool heating.

Hoval Solar Equipment. The complete solution for domestic hot water, space heating support and swimming pool heating.

Clean and in abundance, in fact several billion years worth still remaining. What better way to meet your heating requirements than by utilising solar thermal energy.

Hoval - the one stop solar shop. Solar equipment designed for larger installations. Hoval have a full range of solar products suitable for all sizes of system from small domestic properties right through to large scale commercial installations such as hotels, hospitals, student accomodation, schools, and sports / leisure centres. Expertise you can rely on. Hoval have a wealth of experience and engineering know how when it comes to all scales and types of solar plant application. We pride ourselves on the ability to give you sound advice on any potential projects and offer a concise and fully engineered package when appropriate. If your use for solar energy is for domestic hot water, space heating support, and swimming pool heating, we have a solution. Façades Façades are something that no doubt both Architects and building services Designers will consider more and more in the future. Not only do they work extremely well during the colder months when the sun is low in the sky, they are also effective in the summer. This provides a load levelling solution to your energy needs by helping to produce domestic hot water in the summer and space heating support in the winter. Bespoke projects are handled by Hoval s special contracts team who will manage the project from initial enquiry through to practical completion. For further information contact Hoval s technical department. Swimming Pool Heating Undoubtedly one of the better ways of utilizing solar thermal energy is heating a swimming pool or spa. Heating swimming pools using solar energy makes complete sense for a number of reasons: The relatively low water temperatues required in a pool (i.e. between 26 o C and 30 o C) mean that high collector efficiencies can be achieved. High solar fractions can be expected (especially with indoor pools, where heat losses from the pool are lower than outdoors). This is because collector exit temperatures don t have to be high in order for energy to be transfered. Most indoor pools have a large roof area - an ideal position for the collectors. The pool acts as the heat sink or thermal store so you don t have to buy expensive storage vessels. This means that overall payback periods are relatively short. Solar Skids To speed up on-site installation the solar equipment (i.e. thermal stores, pump sets, heat exchangers and controls) can be pre-piped and wired on a purpose built skid.

Hoval SolKit high efficiency DHW storage cylinder. The complete solar powered DHW system comprising: calorifier, integral solar pump group,controls and expansion tank, flat plate collectors, and umbilical. The SolKit stores the domestic hot water in a way that promotes the highest levels of solar yield. Hot solar fluid is initially directed into the upper third of the water jacket. This ensures solar-heated domestic hot water is always available whenever possible. Once the upper section of the cylinder is up to temperature, the SolKit microprocessor controls redirect the solar fluid towards the lower third of the calorifier to heat the whole contents of the cylinder (470 litres).during times when the available solar energy is low the SolKit will use this heat to pre-heat the cold water entering the cylinder. Hoval SolarCompact DHW twin coil storage cylinder. For customers who want to help to combat climate change, but are on a tight budget; the SolarCompact comprises a cylinder (either 300 or 500 litre), integral pump group, controls, and IDKM200 or WK250/251 flat plate collectors. An inbuilt solar circuit pump tranfers the energy from the solar circuit through a heat exchanger coil located at the bottom of the cylinder, where the cylinder temperature is lowest. This promotes energy transfer even on days when solar yield is low. Cylinder / Vessel Model UOM SolKit SolarCompact CombiVal CR MultiVal CRR ESWE EnerVal Type of cylinder - Calorifier Calorifier Calorifier Calorifier DHW Buffer Primary Buffer Heat transfer method - Water Jacket with coil Twin Coil Single Coil Twin Coil External External Volume litres 470 300 & 500 200-3000 300-3000 540-8000 300-2000 # Material - Stainless Steel Glass Lined Stainless Steel Stainless Steel Stainless Steel Mild Steel Maximum working pressure bar g 10 10 6 6 6 3 Additional / Back up heating - electric electric electric electric electric/indirect indirect # Larger vessels available on request CombiVal CR (single coil) stainless steel calorifiers, (200-3,000 litres capacity). MultiVal CRR (twin coil) stainless steel calorifiers, (300-3,000 litres capacity). ESWE stainless steel buffer vessels, (540-8,000 litres capacity). EnerVal mild steel thermalstorage vessels, (300-2,000 litres capacity) #.

IDKM200 in pitched roof array: two rows of three collectors IDKM200 in pitched roof array: three rows of two collectors IDKM200 in pitched roof array: one row of eight collectors WK251 on pitched roof array: one row of seven collectors with increased inclination brackets. WK251 on wall array: one row of eight collectors. WK250 on flat roof array: multiple rows of four collectors. SolKit on wall array: one row of three collectors. SolKit on flat roof array: one row of three collectors. SolKit on pitched roof array: one row of three collectors. Collector Model UOM SolKit WK250 WK251 IDKM200E IDKM200G GFK6 GFK8 GFK10 VK10 m2 2.4 2.5 2.5 2.0 2.0 6.15 8.20 10.26 1.84 Absorber Collector Area m 2.1 2.2 2.2 Collector Orientation Portrait/Landscape P or L L P 1.78 1.78 5.73 7.64 9.55 1.69 P P L L L P Gross Collector Area 2 Collector Type - Vacuum Tube Absorber Material - Aluminium Dimensions (Length) mm 2500 2355 1081 3146 4184 5222 1172 (Height) mm 1081 2355 1990 1990 2035 2035 2035 1647 (Depth) mm 110 100 100 121 121 110 110 110 107 Weight (Dry) kg 40 48 48 45 45 120 160 200 31 litres 1.2 1.54 1.54 1.15 1.15 3.3 4.4 5.5 1.63 Contents

Hoval Solar Equipment Engineering Sizing and Selection Average annual UK solar irradiation levels 10o 5o 0 o 900 60 o Tap into the UK s solar energy resource! The UK map (left) illustrates the average annual solar radiation in kwh falling on one square metre of surface area inclined to 30 and facing due south. It is worth noting that a large proportion of the energy we receive is during the summer months. Sizing guidelines (valid for flat collectors under the following conditions:) 55 o 1. Average sun exposure about 1200 kwh per square metre per year, related to the horizontal irradiation surface. 2. Sunshine on the collector surface more than 90%, no shade 3. Collector angle of inclination depending upon type of use and period of use: - Open-air swimming pool from May to September 25-35 1100 - Domestic hot water and indoor swimming pool 30-50 - Domestic hot water all year round 35-55 - Industrial water and support heating systems 40-60 1200 4. The ideal collector azimuth should be within 35 due south. Where collector azimuth is between 35 and 45 from south, additional collectors (circa 20%) should be installed. Source: Solar Trade Association Azimuth above 45 from south are not recommended. 5. As far as possible the entire collector surface should have the same azimuth and inclination angles. Installing collector arrays with different orientations is not recommended. For such proposed installations please contact Hoval Technical Department for advice. System specification When sizing and selecting the most appropriate solar equipment for an application the following information is required: (i) Application (DHW, space heating, swimming pool heating or a combination of these) and the expectations of the solar contribution i.e. solar fraction. (ii) Position of collectors (flat roof, pitched roof, inclination of pitched roof, proposed azimuth of collectors) (iii) Type of roof material (i.e. tiles, slates, felt etc.) (iv) Shading from trees, buildings etc. (v) Desired solar fraction, i.e. the average annual contribution solar energy will make to the system (vi) For DHW generation (vi.i) DHW demand (peak, hourly and daily demands) (vi.ii) DHW consumption profile (information regarding peak periods of demand) (vii) For space heating (vii.i) Heating demand (either total kw load or m 2 floor area) (vii.ii) General fabric of the building (i.e. well insulated etc) (vii.iii) System temperatures (viii) For swimming pool heating (viii.i) Indoor or outdoor (viii.ii) Surface area and mean depth of the pool (viii.iii) Desired pool temperature (viii.iv) Chlorine levels Normal hot water demand High hot water demand 24 20 16 12 8 4 Collector and DHW storage sizing chart Number of occupants 1200 1100 900 800 700 600 500 400 300 200 100 Example: A property with 10 occupants with a normal daily hot water demand of 500 litres, would require thermal storage of litres and a total collector area of 20m 2. Daily hot water demand (litres) Collector area (m 2 ) 4 8 12 16 20 24 28 32 36 40 44 48 400 800 Normal solar fraction Increased solar fraction Storage volume (litres) 1200 1600 2000 2400 Optimum azimuth / inclination Normal azimuth / inclination Domestic hot water heating A rule of thumb for domestic hot water heating with standard solar equipment (i.e. flat plate collectors on a HighFlow system) is approximately 1.5m 2 collector surface area and between 50 to 75 litres storage volume per person. Examples of water heating: No. of Collector surface Storage People (m 2 ) (litres) 2-3 4 300 3-4 6 300 4-6 8 500 6-8 10 500 8-10 12 500 10-14 16 800 14-18 20 18-24 24 2 x 800 Please note: larger systems are available on request. Contact Hoval s Solar Division for guidance.

Hoval Solar Equipment Engineering Sizing and Selection Space Heating Support Particularly in the Spring and Autumn periods, in conjunction with low - temperature heating systems, solar collectors can be used (depending upon irradiation) with considerable success. As a rule of thumb, if the solar powered system is required to help generate DHW as well as support space heating, 20% should be added onto the total collector area allocated for the space heating support. Swimming pool heating: Pools may only be heated using copper collectors through a suitable heat exchanger (dual circuit systems). As a guide the total collector area should equate to at least 2/3 of the swimming pool surface area. Collector and storage sizing chart for space heating support and DHW 240 200 160 120 80 40 Floor area (m 2 ) Heat demand approx 70 W/m 2 Heat demand approx 50 W/m 2 Example: A well insulated property with a floor area of 120m 2 has a heating demand of 6kW. Fitted with 16m 2 of collector area and 1200 litres of thermal storage, a solar fraction of around 25% will be achieved. 12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 Heat Output (kw) Total storage volume (litres) (heating + DHW) 400 800 1200 1600 2000 2400 2800 3200 3600 Solar fraction 20% 4 8 12 16 Solar fraction 30% 20 24 28 32 36 40 44 48 52 Collector area (m 2 ) Components of a solar powered system 1 Collectors The collector surface should face to the south. For angles of collector inclination see sizing guidelines, point 3). If possible the collector surface should not be shaded at anytime of the day. 2 Fixings Depending on the installation, Hoval are able to supply fastening parts and assembly kits for different methods of mounting: - In-roof assembly with integrated flashing - On-roof assembly parallel to the roof pitch - On-roof assembly with raised angle of inclination - Flat roof or ground level assembly with different angles of inclination - Wall mounting 3 Connection pipes The solar circuit consists of: - pipes for the heat distribution medium, usually copper pipes including thermal insulation, which are run from the collector to the water heater - sensor pipes for the difference temperature sensor and the frostprotected heat distribution medium. 4 Solar pump group Within a premoulded insulated shell,the solar pump group circulates the solar fluid around the solar circuit, and consists of all necessary components for the normal function of the solar circuit (i.e. filling device, shut off valves, safety valve, flow meter / regulator, pressure gauge and thermometers). Since the solar automatic controls are built into these devices and pre-wired, they are space-saving and assembly-friendly solutions. With the operation of the solar storage MultiVal CRR or with multi-circuit plants the solar pump group SAG will be used, which is suitable for mounting onto a wall. Also the pump group has a connection for an expansion vessel. The performance of the circulation pump should be compaired against the mass flow rate, the length of pipework and flow resistances. 5 Solar water heater and thermal storage In conventional solar packages used for domestic hot water heating or space heating support, the smaller solar water heaters / thermal stores are heated by an internal heating element and the larger packages by an external plate heat exchanger. The Hoval solar storage cylinders such as the SolarCompact, MultiVal CRR and CombiVal CR are equipped with large dimensioned fixed internal coils. In addition to the coil positioned in the lower part of the cylinder the MultiVal and SolarCompact also have a second coil in the upper part for auxilary heating. All Hoval SolarCompact, MultiVal and CombiVal calorifiers can also be fitted with an optional electrical immersion heater. The SolarCompact models 300 and 500 litres also have the solar pump group and the solar expansion vessel already integrated for a spacesaving and assembly-friendly compact solution. For systems with solar space heating support the thermal store is warmed with solar power through an internal solar heat exchanger built into the inspection flange or an external plate heat exchanger. Heat from the thermal store can be transferred through either a plate heat exchanger or CombiVal calorifier. In the case of the heat being tranferred through a plate heat exchanger this can be stored in an ESWE stainless steel potable water buffer vessel. 6 Solar automatic control In the collectors the non-toxic, frost protected heat transfer medium (based on Polypropyleneglycol) is heated. As soon as the temperature at the collector sensor is higher than the temperature measured in the lower part of the solar storage by a pre-set differential, the solar fluid circulation pump is switched on. The pump circulates the heat transfer medium heated up in the collectors through the internal / external heat exchanger to indirectly heat the water contained in the water heaters / thermal storage vessels. The circulation is only stopped once the temperature difference falls below the pre-set differential. Various controllers are available depending upon the hydraulic scheme. The ESR21-R controller caters for simple single circuit systems. The UVR61-3 can control upto three circuits and the UVR64 can control upto four circuits. Systems requiring more elaborate control such as speed control pumps are also available on request. 7 Heat meters In order to monitor the energy being saved by the solar plant an impulse flow meter can be installed and wired back to either the UVR61-3 or UVR64 controller. 8 PressVal Solar A smart microprocessor controlled pressurisation unit which not only provides automatic makeup but also pre-mixes and fills the solar cicuit to the desired pre-set pressure.

Other associated products A Hoval boiler: The perfect complement to a Hoval Solar powered system. Oil condensing to 26kW: Hoval MultiJet Oil Condensing to 84kW: Hoval UltraOil Gas condensing to 83kW: Hoval TopGas Gas condensing to 1440kW: Hoval UltraGas Gasifying log boiler to 50kW: Hoval AgroLyt Wood pellet boilers to 70kW: Hoval BioLyt Modul-Plus The Modul-Plus calorifier is designed for larger output Hoval boilers, but can also be used with other makes of commercial and industrial boilers. Seven model sizes cover a range of DHW outputs up to 10,000 litres/hr at 90 o C primary feed. Modular construction allows a variety of options to suit plant room layouts. Hoval Ltd Northgate Newark Notts NG24 1JN Tel: (01636) 672711 Fax: (01636) 673532 e-mail: solarthermal@hoval.co.uk Web Site: www.hoval.co.uk PressVal Micron The PressVal Micron range of pressurisation units are compact microprocessor controlled units. Covering all system ouputs from small commercial heating and chilled water systems, through to the very largest district heating schemes. Both single and twin pump units are available in wall-hung, free standing, skid mounted, or cabinet housed configurations. Volt free contacts for BMS interface are provided as standard. Plate heat exchangers At the heart of Hoval s plate heat heat exchanger programme is the Hoval UltraPlate, which is available in two basic models; the UP-g gasketted and the UP-b brazed plate heat exchanger. The UltraFlow plate heat exchanger packages and UltraStore plate heat exchanger / buffer vessel packages embrace the advantages of the UltraPlate and provide the installer with an economic solution to meet their DHW needs. Hoval Service For specialist commissioning, maintenance and troubleshooting of your Hoval equipment, contact our in-house Service and Spares Department. Make use of it to ensure economic operation, reliability and best cost of ownership. Feb 2007 By Appointment to Her Majesty the Queen Boiler Manufacturers & Engineers Hoval Ltd Newark. Conservation of energy - protection of the environment Hoval follows a policy of continued improvement and reserves the right to change specifications without notice.