ALSTROM - Model Series ASH-H -Hot Water Generator
The Alstrom Compact Water Heater combines the advantages of both instantaneous and storage heaters. The package is constructed from a horizontal storage tank and a built-in shell & tube heat exchanger. Steam, hot water or heat transfer fluid passes through the shell of the heat exchanger. City water is heated by forced convection in the tubes of the heat exchanger and enters the storage tank. When the consumption of hot water stops, the heat losses are compensated by natural convection heat transfer between the external surface of the heat exchanger’s shell and stored water. In addition, the heated water is circulating between the heat exchanger and the storage tank by natural convection, eliminating the need for recirculating pump.
This system’s design permits fast cleaning, repair and replacement of the tube bundle without draining the water from the tank. The storage tank is already full of heated water that is available to the user during the shutdown. Unique features of this system reduce it’s price and maintenance expenses while making it more reliable. Model “ASH-H” stores water at 140 deg. F (other storage temperatures are optional). A small tank with a large heat transfer section is used as a semi-instantaneous heater. A large tank with a small heat transfer section will serve as a storage heater