Does your heat pump stop at different times when running, then restarts by itself? Chances are it is working hard to meet the heat load and thus the behaviour. The intermittent starting and stopping can be very inconvenient when operating pressure vessels.
However, a buffer tank can help reduce the number of times your heat pump pauses. But still, it is imperative that you confirm it covers the following functions satisfactorily:
1. Hydraulic Separation
A heat pump system contains two circuits — one near the heat emitter and another around the heat pump. These two lines need to interface despite the fact that they are different in design, flow rate, and water temperature.
The buffer tank ‘separates’ these two circuits such that they work as independent entities, without affecting heat transfer between the two heat pumps.
2. Increases Volume
A heat pump system runs continuously adding the heat to keep the building at optimum temperatures. It works just fine during the seasons when the building is losing a lot of heat. However, during hot seasons, the heat pump does not have to run throughout.
The buffer tank helps relieve the extra volume of the heat pump’s load. The buffer tank heats the building for a while, while the heat pump takes a break.
3. Choosing a Buffer Tank
Buffer tanks come in different sizes and various models. The pump model design requirements and capacity of your heat pump will affect your choice of the buffer tank. But, is a buffer tank a necessity for every heat pump?
Well, buffer tanks are necessary for optimum performance of heat pumps and other pressure vessels. However, some heat pumps come with pre-installed buffer tanks while others do not have the buffer tank. Always inquire about your best choice of a buffer tank from a reliable buffer tank manufacturer before adding it to your heat pump.