The directors and staff at de la Haye
Engineering have been advising on and supplying accumulator
tanks for a wide variety of renewable and other applications
since 2005. We are renowned as specialists in specifying
accumulator tank systems.
We also have extensive experience in
biomass boiler system design, supply and installation; please
see our dedicated website for all our biomass boiler products
But what is an accumulator tank, and why would I use one?
An accumulator tank or thermal store enables the highest level
of efficiency and flexibility in water-based heating systems for
both commercial and domestic applications.
Manufactured to order in Finland, the Akvaterm accumulator tanks
we supply are highly insulated thermal storage vessels ranging
in standard sizes from 300 to 10,000 litres capacity.
Akvaterm tanks are fully customiseable in terms of connections,
coils, pressure rating and even size (the latter on Akva models
Their function is to collect and store heat energy from any
source and allow the flexible use of this heat energy, either
directly for space heating or via an internal heat exchanger for
domestic hot water (DHW).
An accumulator tank is the answer for all micro-generation
renewable sources: solar thermal panels, biomass boilers, wind turbines and heat
pumps can all be connected to the thermal store,
and if the energy is not needed at the time of generation the
tank will store it for later use.
The accumulator tank is especially suitable as a thermal store
in log boiler or stove systems. Log boilers need to be fired at
high temperature in order to achieve maximum efficiency and
should not be banked down. The accumulator tank is therefore
used to store the heat from at least one firing of a fully
loaded log chamber, allowing use of this heat as required long
after the boiler has completed its firing cycle.
A 'loading' or 'charging' unit (such as the Laddomat 21) is used
to maintain a high return temperature to the boiler and to
'charge' the accumulator tank from the top downwards with high
temperature water, thus creating layering or 'stratification'.
Hot water for heating and DHW is then available soon after
lighting the boiler.