Commercial heating
Adveco solar thermal ASHP preheat solar thermal
www.heatingandventilating.net
A cost effective path to carbon reduction – solar thermal
Faced with actively addressing carbon reduction, as well as the need to mitigate rising energy costs, solar thermal systems are ideal for commercial organisations which rely on large amounts of domestic hot water (DHW) according to Adveco technical director Bill Sinclair
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t is important to understand that a solar thermal system will not fully replace an existing water heating system, and will not provide space heating but is capable of offsetting typically around 30% of the energy demands for water heating. Modular, high-performance flat plate collectors
are by far the most efficient way to heat water with solar energy, offering a smaller footprint compared to equivalent solar photovoltaics (PV) for DHW. A typical 4 kW PV system requires approximately 16 panels covering 25m² of roof to match just three flat plate collectors covering just 6.6m² roof area. This makes solar thermal a prime choice when roof or façade space is limited. A south-facing and unobstructed roof with an inclination of 30° from the horizontal is optimal, though by no means essential as modern solar collectors can be installed in a variety of permutations. Adveco collectors feature a copper meander absorber through which passes the solar fluid (glycol) transferring solar energy as heat to the system’s water via an indirect cylinder. Collectors
12 November 2023
Left: Bill Sinclair, technical director, Adveco
Right: Adveco solar thermal preheat electric FUSION E after heat system
with an integrated drain back module, which as the name implies drains the solar fluid from the collector to a reservoir when not in use, prevents damaging overheating of the solar fluid. The technology not only stops the glycol from being ‘cooked’ to a tar-like consistency which can cause permanent damage to the collector, but also offers a low-maintenance, more cost-effective (as there is no requirement for large solar storage) and more efficient (as there is no call to dump unused heat) approach to incorporating solar energy into a sustainability strategy.
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