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Solar Thermal Collectors

  • Overview
  • Features
  • Overheat Protection and Drain-back
  • Specifications
  • Related Products

Home » Products » Water Heating » Solar Thermal Collectors

Solar Thermal Collectors

Solar Thermal Collectors

As with any technology, issues can arise if a commercial system is poorly designed or maintained. In terms of solar thermal systems, the results can vary from frustrating to catastrophic and can prove to be extremely costly.

By far the greater concern is stagnation of the solar fluid as a result of high-temperature build-up within the collectors when a system is not operating. solar thermal collectors or panels utilise the sun’s energy to heat a water & glycol mix in the panel. This solar fluid is then pumped to a heat exchanger inside a water cylinder.

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Technical Specifications
Solar panels, part of a solar thermal commercial hot water system.
Adveco Bishopsgate case study heating systems
Drainback heating systems from Adveco
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Features & Key Technologies

  • Proven renewable technology
  • High-efficiency flat panel design
  • Intrinsically safe drainback system
  • Reliable, low maintenance with assured system longevity
  • Smaller footprint than PV for equivalent thermal generation
  • Ideal for renewable applications with large roof area and predictable hot water demands
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Overheat Protection and Drain-back

If a solar thermal system has no overheat protection the fluid can change to the consistency of tar. The ‘tar’ can rapidly develop as a film, and within a multiple collector system, it is likely that some of these will become blocked and will not be able to be cleared out causing permanent damage and resulting in very high repair costs. We have seen this issue develop in systems a matter of weeks after initial installation!

Overheat protection is therefore vitally important and will typically require the addition of a large solar storage or buffer vessels to dump unwanted heat to stop the system from stagnating. Together with the heat dump system starting in the middle of the day due to a short period of low demand, the Solar Thermal application could be extremely inefficient.

At Adveco, we are proponents of systems that offer drain-back, which as the name implies drains the solar fluid from the collector to a reservoir when not in use, allowing for a system to be safely off.

A drain-back vessel located in the plant room is one option, that will also allow for pipework fluid, but will require greater head pumps.

With Adveco’s flat plate collectors, featuring integrated drain-back module, commercial buildings with high demands can deploy a large number of collectors with a small tank and still provide high-temperature water with the knowledge that in times of low use high-temperature build-up in collectors is impossible. This ensures the system remains protected. This approach is also more cost-effective as there is no requirement for installation of large solar storage, and more efficient as there is no call to dump unused heat.

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Specifications

Adveco Solar Collectors

  • Rugged 2.24 m² flat plate collectors
  • Approved by EN12975-2-2006
  • Solar Keymark certified
  • Temperature resistant up to 200°C
  • Installation options: roof build-on, roof build-in, frame construction for flat roof and wall mounting
  • Smaller footprint compared to equivalent solar photovoltaics (PV) for DHW (Three Adveco solar thermal panels at 6.6m² versus typical 4 kW PV system with 16 x panels at 25m²)
  • Simple installation system for multiple panels
  • Complete installation is delivered in a single package including assembly materials
  • No operational noise for zero sound pollution
  • No high global warming potential (GWP) refrigerants
  • No specialist registration, such as F-gas, is needed for installation, although installers should be solar trained
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Adveco Drainback Systems – For Long-lasting, Low-Maintenance Renewables

  • Highly compact, modern design
  • Prevents stagnation temperatures
  • Automatically drains fluid if power is cut without the need for working components
  • Reduces required pump capacity and energy use of pump station to a minimum
  • Patented drain back system, available as an accessory
  • Low maintenance with long operational lifespan. Fluid refresh is required every eight years at most
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Related Products

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Solar thermal collector from Adveco

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Immersion heaters from Adveco

Immersion Heaters

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UK (Head Office)

  • Address
  • Adveco
  • Units 7 & 8, Armstrong Mall
  • Southwood Business Park
  • Farnborough
  • GU14 0NR
  • Telephone
  • +44 (0)1252 551540
  • Office Hours
  • Monday to Friday: 08:30-17:00

Download our Product Guide

Adveco Product Guide 2023 - Hot water, heating, renewables, pre-packaged plant rooms for bespoke commercial projects
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Why Choose Adveco

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50 Years

Adveco Ltd. is the independent hot water specialist for the commercial built environment and has historically traded as A.O. Smith Water Heaters in the UK.

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Highest quality products and services

We prioritise our clients’ needs to deliver bespoke, practical systems.

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Full aftersales support

Maintenance and service packages, commissioning, spares, warranty and technical support for your application.

 

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Adveco Ltd. is the sister company to Adveco (AWP) Ltd, trading as A.O. Smith Water Heaters in the UK and has more than 50 years of expertise in the building services industry.

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