Thermal Store Design
Thermal Stores are tall and thin; encouraging the natural tendency of heated water to form layers of heat, with the hottest at the top and the coldest at the bottom commonly referred to as stratification. Stratification is beneficial in thermal stores and is actively encouraged by both the shape of the store and also by placing the cold feeds and returns at the bottom of the store and reducing the movement of water within it.
Heating systems linked to thermal stores make the most of this by ensuring connections are placed at the point of maximum gain e.g. underfloor heating, which works at lower temperatures, would take heat from the lower part of the cylinder and heat for hot water would be taken from the top.