Heated Water Storage Tank with Integral Trapped Air to Mitigate Expansion/Contraction

摘要

A water tank as part of a system that limits the pressure in the system and eliminates the need for a separate expansion tank. The water tank includes a hot water pipe with an inlet positioned a first distance below the top of the water tank, the first distance is determined so that the volume above the hot water pipe inlet exceeds a volume that water in the tank will expand when changing from a first low temperature to a second higher temperature. In a closed loop hydronic system embodiment, when dissolved air in the water separates, the separated air is caught by the volume of air at the top of the water tank which prevents the separated air from traveling through the closed loop system.

主权项

1. A storage device for holding and heating water, comprising:
a container designed to hold a first amount of water, having a side, a floor and a ceiling; a first pipe having a first outlet positioned within said container for bringing cold water into said container; a second pipe having a first inlet positioned within said container at a level above said first outlet, for transferring heated water out of said container, said first pipe passing through said ceiling; and a heating device for heating the water in said container; wherein said first inlet is positioned at a first distance from said ceiling such that a first volume of said container being the volume between said first inlet and said ceiling exceeds a second volume being a difference in volume between said first amount of water at a first temperature and said first amount of water at a second temperature.