Group: Alfa Laval
Catalog excerpts
Semi-instantaneous tap water system AquaStore Applications AquaStore is a semi-instantaneous Tap Water System designed to provide Domestic Hot Water in large quantities – up to 1200kW – for applications such as apartment buildings, hospitals, hotels, retirement homes, nursing homes, schools, sports centres, prisons, … Different models of AquaStore are available to fit with any installation arrangement. For instance, AquaStore operated with a 3-Port or 4-Port valve can be connected to local boilers on site or primary tanks. AquaStore operated with a 2-Port valve would match requirements of district networks when the Tap Water System is directly connected to the city pipework. When it comes to the selection of the heat exchanger, AquaStore offers a large choice of possibilities: Plates&Gaskets, Copper Brazed or AlfaNova®: exclusive to Alfa Laval (100% Stainless Steel, Fusion Bonded). Dependable performance Since 1923, Alfa Laval has been in the water heating business, and has become a leading manufacturer and supplier. AquaFlow incorporates a wealth of background experience for secure and reliable hot water production. The components have been carefully selected and tested to perform well in combination with one another. Principle On the primary side, AquaStore has to be fed by a heating source that can be provided by any source of energy: local boiler, district network, primary tank, solar system, … On the secondary side, AquaStore is connected to a storage vessel on site and to the water main (CW). The charging pump (PC) located on the Domestic Hot Water side of the heat exchanger is used to store the storage vessel with hot water. When there is no or limited tapping of Domestic Hot Water, the storage vessel is gradually heated up to the setpoint temperature. When tapping occurs, hot water is being drawn from the top of the storage vessel. When the Domestic Hot Water demand corresponds to the energy supply, the heat exchanger compensates without affecting the quantity of stored hot water. The stored hot water is only used for peak period when the Domestic Hot Water demand is higher than the energy supply. In that case, the available flow rate of Domestic Hot Water corresponds to the flow rate provided by the heat exchanger combined with the volume of stored hot water in the storage vessel. In the event that the storage vessel is emptied out before the end of the peak period, AquaStore will always provide Domestic Hot Water at a nominal flow rate corresponding to the energy input. A circulation pump (PR) is usually used to limit the time needed to deliver Domestic Hot Water to the tap at the right temperature. The circulation pump maintains a minimum flow rate through the heat exchanger and through the distribution pipework. Energy is exchanged through the heat exchanger from the primary to the secondary side. AquaStore
Open the catalog to page 1A temperature sensor (S) located at the secondary side outlet checks the temperature and adjusts the control valve (VA) accordingly in order to always maintain hot water at the right temperature. The piping arrangement of the control valve provides tight control of the energy entering the primary side. AquaStore with the 3-Port or 4-Port valve follows the Variable Temperature and Constant Flow Rate principle. In which case, the temperature of the media entering the heat exchanger on the primary side is adapted to the demand detected on the domestic side. This eliminates thermal shock in the...
Open the catalog to page 2Example of maximum capacities at different temperature program: AquaStore 2-Port AquaStore 3-Port AquaStore 4-Port Capacity Primary Flow Rate Secondary Flow Rate Capacity Primary Flow Rate Secondary Flow Rate Capacity Primary Flow Rate Secondary Flow Rate kW m3/h L/min kW m3/h L/min kW m3/h L/min Plates&Gaskets 90°C – 10/55°C 1100 17.5 352 1220 20.4 390 1370 24 437 80/60°C – 5/70°C 340 15 75 400 17.7 77 500 22.2 110 82°C – 10/60°C 750 15 216 945 20.5 272 1140 25.5 327 65/45°C – 10/60°C 370 17 107 350 15.4 100 320 14.1 92 Copper Brazed or AlfaNova M90°C 10/55°C 1000 13 320 950 12.1 304 On...
Open the catalog to page 3ECF00187EN 0907 Alfa Laval reserves the right to change specifications without prior notification. How to contact Alfa Laval Up-to-date Alfa Laval contact details for all countries are always available on our website at www.alfalaval.com PRV VR PC V Alfa Laval scope of supply / Limite de fourniture HE A B CW DHW / ECS PR DC PRV DHW / ECS AQUATANK V AquaStore version de base AquaStore kit primaire 2psa AquaStore primary kit 2psa CW Alfa Laval scope of supply / Limite de fourniture B V PC VR PRV A V HE S DC V AQUATANK PR DHW / ECS V DHW / ECS PRV AQUATANK AquaStore kit primaire 3p AquaStore...
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