Know More about Hot Water Storage Tanks

Storing the hot water plays a key role in any water heating system as the aim is always to keep the water at its desired temperature for the longest time period. On the other hand transferring the energy from the sun to the stored water is a vital step in the heating process. The delivery process of this warmth to the water can be done in different ways based on the tanks design and properties.

Pressurized Water Storage Tanks

When storing solar-heated water, pressurized water tanks with internal or external heat exchangers have proven themselves long-lived, with low or no maintenance. They are suitable for various residential and industrial applications.

Tank-in-Tank

Unpressurized Water Storage Tanks

There are also several options for unpressurized water storage tanks that are used typically with immersed coil heat exchanger, intended usually for drain-back solar water heating systems. These tanks are ventilated to the surrounding air through an open tube at the top to prevent pressure buildup in the tank. Drainback sola water heating systems from Vaillant are carefully designed and implemented to assure zero pressure build up and optimum efficiency of operation.

Multifunction Storage Tanks

Many pressurized and unpressurized storage tanks include electric heating elements and a thermostat, much like a conventional electric water heater tank. This is the easiest way to provide backup to your solar-heated water. The electric element is usually mounted near the top or center of the tank so that only the top is heated electrically, and the bottom remains cooler for better solar heat gain.

Some tanks are manufactured with built-in electric backup; they can offer the option of both an electric backup and a second heat exchanger coil for indirect heating with a boiler as the primary lower coil is utilized by the solar collectors in the solar water heating system.