Calorifiers and Hot Water Storage in Corrosive Water Conditions

For many companies, the assured availability of hot water is a business-critical issue, but one that can quickly become costly for those operating in the southwest and northwest of the UK, the Welsh coast and throughout Scotland. With a low pH, low total dissolved solids (TDS) and negligible buffering capacity, these naturally soft water areas prove highly corrosive to glass-lined vessels used as calorifiers and hot water storage.

Glass is, given the right conditions, generally resistant to attack from most chemicals and corrosive materials and easier to clean, making it a popular choice for lining steel vessels used in hot water systems. But corrosion is a complex phenomenon, and in naturally soft water conditions, despite the use of sacrificial anodes, glass-lined vessels can rapidly succumb to critical corrosive damage.

Pressure to Perform

In addition, the taller the structure, the greater the pressure requirements on the system, particularly since a common design choice is to locate the plant room in the basement. In order to meet, even small demands with a consistent, strong flow of hot water systems inevitably are oversized, adopting a larger, often bespoke tank.

This immediately exacerbates the existing threat, as oversizing, or the failure to correctly balance water flow also contributes to system corrosion. Oversizing of the pumps leads to high-velocity hot water circulating through the system and suspended solids in the water are driven against the metal leading to erosional corrosion. This process helps accelerate the soft water corrosion at points where water changes direction, such as when passing into or through tanks.

Glass-lined water vessels used as calorifiers and hot water storage under these conditions can potentially fail due to corrosion in a matter of just months – even with the use of sacrificial anodes. For these reasons, manufacturers will reduce or have even ceased to offer warranties on glass-lined products installed in these soft water regions. As a result, their specification into projects in these regions really can be a false economy.

Change to Resistant

Far more resistant to these water-side assaults are stainless steel vessels. Although there is a higher upfront cost, this would be easily offset by the relative longevity of the appliance. However, projects with smaller, yet higher pressure hot water demands, will still face the issue of oversizing. This further extends capital costs, of products, installation and the need for greater plant room space. As a result, project costs can become prohibitive for stainless steel, resulting in the specifying of the less expensive glass-lined alternatives gambling that they will prove resistant enough in the mid-long term.

Adveco addresses these concerns with its ATSx range of compact stainless steel, high-pressure hot water tanks. Specifically designed to serve as buffer vessels (ATSB) and indirect hot water calorifiers suitable for use with lower capacity, high-pressure commercial applications in soft water areas. The ATSx range provides specifiers and contractors with a wide choice of calorifiers and hot water storage vessels all rated to 10 bar as standard, which are by far the most efficient and cost-effective choice for businesses with smaller system demands.

Another advantage provided by the indirect water heaters in this range (ATSI, ATST, ATSH & ATSR) is that due to the transferral of heat through the walls of the heat exchanger element the two fluids do not mix. This allows for more options in terms of the external heat supply and introduces a range of renewable technologies that use other fluids for heat transfer including solar thermal collectors and Air Source Heat Pumps. The twin coil ATSR has been specifically designed for these lower-temperature renewable applications. These calorifiers are also relatively simple to install, since there is no burner, there is no need for a gas supply to be directly connected to the appliance and the is no requirement for a flue.

As with any hot water application, understanding the relationship between storage and recovery, and correct sizing is extremely important for efficient and cost-effective operation. Integrating a stainless steel calorifier within a hot water system gives you a number of design options, with a large efficient boiler a calorifier can be smaller avoiding unnecessary capital and ongoing operational expenditure. At 200 to 1000 litres the ATSx range provides a compact, tough resolution for lower demands applications in those soft water areas. If your project has pressure requirements greater than six bar, then the ATSx vessels are by far the most efficient and cost-effective choice for your project.

If the boiler is smaller, or demands for hot water are greater, then going too small means the storage could prove inadequate and the system will not achieve its operational requirements. For projects with larger demands or requiring greater customisation Adveco can support the project with the SSB, SSI and SST ranges of bespoke stainless steel calorifiers and hot water storage vessels.

Discover more about the Adveco ATSx range.

Learn more about soft water corrosivity.


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Adveco ATSx Stainless Steel Hot Water Tanks for Soft Water Areas

  • A complete range of indirect hot water calorifiers and buffer vessels.
  • Corrosion-resistant stainless steel construction for soft water areas.
  • Designed for high pressure, lower demand projects.

Commercial hot water and heating specialist Adveco, announces the ATSx range of stainless steel hot water tanks. The new product range encompasses five classes of vessel up to 1,000 litre capacity at 10 bar as standard to serve as buffer vessels and indirect hot water calorifiers. The range is designed to provide a more economic choice for high pressure, lower capacity commercial applications in soft water areas.

With single coil, twin coil and plate heat exchanger options for maximising transfer of energy, the ATSx stainless steel hot water tanks offer consultants, specifiers and contractors a broader set of options for the storage and delivery of domestic hot water (DHW) in soft water areas for their projects.

ATSI – Single coil indirect water heater.

ATST – Twin coil indirect water heater.

ATSH – Single double-helical high-capacity coil indirect water heater.

ATSR – Twin coil indirect water heater for lower-temperature renewable applications.

ATSB – Storage/buffer tank without coil.

Speaking of the launch of the ATSx range, Adveco’s Technical Director Bill Sinclair said:

“If your project has smaller hot water demands, but with pressure requirements greater than six bar, such as in taller buildings with a basement plant room, then the ATSx vessels are by far the most efficient and cost-effective choice for your project,”

Constructed from corrosion-resistant AISI 316Ti and 316L stainless steel, all ATSx tanks are designed, manufactured, and tested to the requirements of the Pressure Equipment Directive (97/23/EC), EN 12897.

The ATSx range is also supported by a choice of options and ancillaries from Adveco including control and overheat thermostats, destratification pump kits and unvented kits.

For projects with larger demands or requiring greater customisation in soft water areas, Adveco offers its SSB, SSI and SST ranges of bespoke stainless steel calorifiers and buffer vessels.

Discover more about Adveco’s ATSx range


Adveco commercial hot water and heating. For more information about Adveco’s ATSx stainless steel hot water tanks, call us on 01252 551 540 to discuss requirements, sizing etc.

 

Adveco’s Packaged e-Hot Water System Named Finalist in 2021 H&V News Awards

  • Named finalist in the H&V News 2021 Commercial HVAC Product of the Year – Heating
  • Reduce operational costs by offsetting up to 70% of the energy required by equivalent sized systems. Dramatically reduces CO2 emissions
  • Unique low heat intensity specification reduces the threat of scale formation

Adveco is proud to announce it has once again been selected as a finalist in the Heating & Ventilation News (H&V News) Awards, Short-listed in the 2021 Commercial HVAC Product of the Year category for heating, the Packaged e-Hot Water System from Adveco offers commercial businesses with large hot water demands but space limitations a complete, pre-sized highly-efficient, low carbon system in a box.

“We are incredibly pleased to be shortlisted once again in the H&V News Awards, especially for our e-Hot Water System in this our 50th anniversary year. It is a product that most reflects the evolution of the business and the rapid changes we are seeing across the built environment. Unifying excellence in application design with innovative, low carbon technologies provisioned under an offsite construction model, this brings a wealth of new advantages for consultants, contractors, installers and owner/operators.”

Adveco’s Packaged E-Hot Water System makes full use of the FPi32-9 ASHP to provide the system preheat from 10°C to 50°C, supplying 70% of the DHW load with an 80% reduction in Global Warming Potential (GWP) from the heat pump. By offsetting 70% of the energy requirement the Packaged e-Hot Water System can demonstrate a 47% reduction in energy demands and CO2 emissions for the same output of 500,000 litres of hot water each year when compared with a similar direct electric-only system. The reduced energy demand also means operational savings can be added to the capital savings secured during the design, supply, and installation phases.

The system is also ground-breaking in the application of a completely new specification that lowers the heat intensity, without detrimental effect to the demands for hot water, meaning the Packaged e-Hot Water System is also more resistant to scale, reducing maintenance demands.

“We see this award selection as a real acknowledgement of the entire team who have worked tirelessly in close partnership with our customers to create and deliver a better resolution for commercial hot water provision that also showcases our commitment to sustainable low carbon technologies,”

adds David.

The winners will be announced this November and we wish all the finalists the very best of luck.

Adveco FPi32 Range Named Finalist in 2021 National ACR & Heat Pump Awards

Commercial hot water and heating specialist Adveco is delighted to announce it has been named as a finalist in the 2021 National ACR & Heat Pump Awards for its range of FPi32 Air Source Heat Pumps (ASHP).

The Adveco FPi32 is a range of compact monobloc design 6, 9 & 12 kW air to water heat pumps providing hot water at 55°C, or higher in hybrid systems. The FPi32 range leverages R32 refrigerant to enhance year-round efficiency (COP as high as 5.23) while reducing the global warming potential (GWP), thereby lowing environmental impact. The judging panel’s selection process assessed the FPi32 range on a number of key attributes including technical innovation; energy efficiency; environmental impact; plus installation and operational benefits for customers.

R32 commercial Air Source Heat Pump (ASHP).With Advanced Vector Control technology delivering accurate response to variable demands, integrated, intuitive controls, non-return valves, pressure gauges, and frost protection as standard, FPi32s are easy to install and maintain with low running costs. The FPi32 also features low noise impact with quiet 52dB operation.

The FPi32-9’s compact monobloc form factor also makes it perfect for integration into Adveco’s Packaged e-Hot Water System.  A complete, highly efficient, low carbon, all-electric packaged water heating system that uses the FPi32-9 to provide preheat for reliable high-temperature water supplied in a convenient GRP housing.

Bill Sinclair, technical director, Adveco, said, “The use of R32 refrigerant may be a relatively small step in terms of technical development, but its use has major implications in terms of taking us toward responsible, sustainable systems that deliver business-critical hot water without harming the environment. Not only does this go a long way towards helping businesses meet carbon targets this decade, but it also helps keep running costs low.”

The winners will be announced at the National ACR & Heat Pump Awards on October 20th and we wish all the other finalists the very best of luck.

Discover more about the FPI32 Range of ASHPs

The Adveco 2021 Product Guide Now Available

Hot water and heating specialist Adveco, has published its latest Product Guide for 2021 (PDF). This handy booklet provides a complete overview of Adveco’s current portfolio of commercial hot water and heating products. With the Government’s pledge to deliver net-zero by 2050, the commercial sector faces an increasing challenge to address the carbon emissions from buildings. The recent sixth Carbon Budget put the scale of the challenge into perspective, calling for a 78% reduction in carbon emissions by 2035 if we as a nation are to meet this long-term net-zero commitment.

Whether planning a new build or refurbishing existing buildings, Adveco provides a broad choice of appliances, controls and ancillaries for the design and manufacture of bespoke applications. Supporting the drive to a more sustainable future, Adveco offers an ever-expanding range of renewables; from its long-term provision of solar thermal systems to award-winning boxed Heat Recovery Units, and the latest commercial-grade air source heat pumps.

Wherever a project is located, Adveco can support with the optimal technology; from glass-lined water heaters for hard water areas to corrosion-resistant stainless-steel alternatives for soft water conditions, and renewables that address the limitations of regional climates.

With access to the latest hot water and heating technology, we can ensure your application is provisioned with highly efficient, low-emission appliances, that offer the highest quality, robust construction to ensure longevity and best value investment.

The Adveco 2021 Product Guide provides an easy reference for a range of boilers, buffers and thermal stores for heating projects. It also incorporates the A.O. Smith range of condensing gas and electric water heaters, all supported by Adveco calorifiers, plate heat exchangers and immersions for hot water systems. Also discover the advantages of Adveco offsite construction, providing complete prefabricated plant rooms for heating and hot water systems.

All Adveco’s products are supported by 50 years of industry expertise as the independent provider of application and system design, bespoke manufacture and aftersales service and support. All supplied at a quality only a specialist manufacturer can deliver.

Download the brochure today


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Adveco L70 ASHP For Hot Water With 70% Less CO₂

  • 90 kW maximum output for hybrid domestic hot water and heating
  • Specifically designed for the UK climate (-20°C to +35°C)
  • Reduce CO₂ by as much as 70% compared to gas-fired systems

Nov 9th 2020 Commercial hot water and heating specialist Adveco extends its range of commercial air source heat pumps (ASHP) with the introduction of the Adveco L70. This high-capacity air-to-water monobloc heat pump is designed for the UK climate providing hybrid domestic hot water (DHW) and heating.

Bill Sinclair, technical director, Adveco said:

“In conjunction with Adveco’s bespoke application design, the L70 offers a comprehensive response for sustainable heating and hot water, providing high-efficiency, low-emission, low cost to operate systems for the life of a commercial building.”

Rated 70kW for typical UK operation at 5°C but climbing to a maximum 90 kW from a single compact unit, and with a seasonal coefficient of performance (SCOP) as high as 4.08 the L70 is perfect for large scale commercial applications and can operate as part of a cascade installation for projects demanding greater capacity. The L70’s dual compressor configuration allows for staged start-up to limit current draw and gives the flexibility to drop to half output under low load conditions.

With ASHPs offering greater efficiencies in low-temperature systems, the high-temperature demands of commercial DHW applications can be a challenge. Achieving working flow temperatures up to 60°C, the L70 supplies preheat for hybrid applications composed of combinations of plate heat exchangers, buffer vessel, with calorifiers, gas-fired boilers or direct-electric water heating providing essential additional heat to meet commercial requirements.

The L70 will dramatically lower CO₂ when analysed using the carbon intensity figures from the new SAP10.  Compared to gas-based systems the carbon emissions are reduced by around 70%, when using the SCOP of 3.47 measured at 55°C flow temperature (Ecodesign warm European temperature zone with a reference design temperature of 2°C).

The L70 remains eligible for applications for the non-domestic Renewable Heat Incentive (RHI) until March 2022 and is ideal for projects applying to the Government’s Public Sector Decarbonisation Fund to drive energy efficiency.

Additional information: L70 ASHP

Adveco L70 Air Source Heat Pump (ASHP).

  • Dual refrigerant circuits with smart control and built-in remote monitoring system.
  • COP 3.65 (7°C ambient) to 2.83 (-10°C ambient) at 35°C water temperature.
  • Maximum working temperature/ambient air -20°C to +35°C
  • Automatic reverse cycle for built-in frost protection.
  • Maximum working temperature range /waterside 25 to 60°C
  • Noise level 51.6 dB(A) (sound pressure at 10m).
  • W2180mm H2100mm D1070mm.
  • Dry mass 900kg.

Adveco’s Packaged e-Hot Water System Named Finalist in 2020 HVR Awards

  • Named finalist in the HVR 2020 Commercial Heating Product of the Year.
  • Reduce operational costs by offsetting up to 70% of the energy required by equivalent sized systems. Dramatically reduces CO emissions.
  • Unique low heat intensity specification reduces the threat of scale formation.

Adveco is proud to announce it has once again been named finalist in the Heating & Ventilation Review (HVR) Awards.  Named finalist in the 2020 Commercial Heating Product of the Year category, the Packaged e-Hot Water System from Adveco offers commercial businesses with large hot water demands but space limitations a complete, pre-sized highly-efficient, low carbon response.

The HVR Awards celebrate the products, brands, businesses and people that have led the way with their innovation and unrivalled levels of excellence, inducting them into the prestigious HVR Awards ‘Hall of Flame’.

“It is fantastic to see our Packaged e-Hot Water System be recognised in this way,”

said David O’Sullivan, managing director, Adveco.

“We are very proud of this product which brings together every aspect of our business, unifying our application design, product expertise and site services to provide a sustainable, future-proof product that is a robust, efficient and cost-effective way to secure hot water for a myriad of commercial applications.”

Adveco’s Packaged E-Hot Water System makes full use of the FPi-9 ASHP to provide the system preheat from 10°C to 50°C, supplying 70% of the DHW load. Offsetting 70% of the energy requirement means the Packaged e-Hot Water System can demonstrate a 47% reduction in energy demands and CO₂ emissions for the same output of 500,000 litres of hot water each year when compared with a similar direct electric-only system. The reduced energy demand also means operational savings can be added to the capital savings secured during the design, supply, and installation phases.

The system is also ground-breaking in the application of a completely new specification that lowers the heat intensity, without detrimental effect to the demands for hot water, meaning the Packaged e-Hot Water System is also more resistant to scale, reducing maintenance demands.

“The vision for, and execution to market of the Packaged e-Hot Water System has been a real team effort,”

adds David.

“Being named finalist once again in the HVR awards demonstrates the advantages of Adveco’s independent approach to innovation, ensuring customers have the very best system response to their need for low carbon, cost-effective applications as we all work to achieve net-zero.”