Recent content by sharpener

The circulation pump would only run when the heat pump is heating the tank. I don't fully understand the other points you are trying to make, sorry, it reads to me like a google translation from another language (perhaps it is?). As several posters have mentioned, there are drawbacks to...

Yes. Perhaps the cold inlet port and the drain cock tapping would be sufficient though?

Maybe the answer is to connect the pump between two ports on opposites sides of the tank but both of them at or near the bottom. The aim being to stir the cold water in the region of the coil without disturbing the stratification too much. Most of the tanks I have owned have in addition to the...

OK so the result is useful. Without any agitation the initial rate of rise inside the tube is about 6C/min and with agitation it is about 10. Without agitation the temp is still rising slowly after 10 mins and with agitation it reaches a plateau at 7. While the swishing motion is effective at...

A typical UK domestic hot water tank holds c. 200 litres of water. Hitherto the common method of heating it to say 60C has been by means of an internal coil of copper pipe through which is pumped hot water from a gas boiler at ~ 70C. Heat transfer on the outside of the coil is by natural...