Tag Archive for: L70

Heat Pumps For Hot Water In Commercial Buildings

Heat pumps for hot water is synonymous with the drive to introduce greater sustainability into buildings in the push to achieve net zero by 2050. When it comes to the provision of  hot water (DHW) within commercial building projects there remains a consensus that, despite the rhetoric, currently there is no single ‘silver bullet’ technology able to deliver all the answers.

Until decisions are finally made in 2026 on a hydrogen-based future, the government’s stance is set on electrification, the creation of heat networks and the installation of heat pumps for hot water. For organisations looking for a quick sustainability win then heat pumps provide a clear opportunity, so long as the property is a new build. For new commercial builds, consultants are already specifying a greater electrical load to account for the additional power demands to support a mixture of heat pumps and direct electric afterheat necessary to meet the higher water temperatures and volume demands exhibited in commercial projects. New DHW systems will predominantly follow this model, taking advantage of heat pump performance efficiencies to create a hybrid approach to deliver pre-heating for as much as 75% of the water in a direct electric system. And with no gas to the building, no local generation of NOₓ and no flue to install this clearly has its advantages.

With 50 years of specialist experience in creating bespoke commercial DHW systems, Adveco is well-positioned to support such projects with a wide range of air source heat pumps for hot water, as well as indirect tanks and electric immersions.

Compatible with existing DHW distribution systems with higher thermal requirements, the FPi32 ASHP range is ideal for integration into a hybrid hot water system. Transferring heat from the air to a building, the FPi32 can provide a working flow of hot water at 55°C throughout the year, even when ambient air temperatures drop as low as -25°C.  When combined with either a gas or electric water heater and controls, the FPi32 helps reduce emissions and increases efficiency without compromising reliability or performance.

Packaged Systems With Heat Pumps For Hot Water 

The three models, available in 6, 9 and 12kW variants provide a low carbon source of hot water in a more compact, quieter, more efficient and easier to install unit. The FPi32 also sits at the heart of two pre-sized offerings, FUSION and the e-32 Packaged Hot Water System. For organisations with small to medium basin and sink led hot water demands, FUSION offers 16 pre-specified variants. With a choice of 6 or 10 kW preheat and 9 or 12 kW electric top-up, FUSION offers capacities ranging from 200 to 500 litres all rated at 10 BAR for high-pressure applications. Combining the FPi32 with a high-pressure ATSH calorifier with electric immersion, controls, and metering, FUSION systems are able to meet a range of continuous capacity hot water demands from 257-377 litres/hour for a wide range of commercial buildings.

Where space is at a premium, the e-32 Packaged Hot Water System comes into its own. This prefabricated all-electric water heating system uses an FPi32-9, a 200L GLC indirect preheat tank and a 200L GLE direct electric water heater all housed in a compact GRP housing. This ‘plant room in a box’ can be conveniently positioned externally on flat roofs or in unused or ‘dead’ spaces. This makes the system ideal for a wide range of commercial properties with regular hot water demands such as restaurants and boutique hotels, offices, schools, and light industry. The system is also exceptionally useful if refurbishing existing building stock.

Larger DHW demands

For projects with greater DHW demands, Adveco’s L70 high-capacity air-to-water monobloc heat pump is rated 70kW for typical UK operation at 5°C but climbing to a maximum 90 kW from a single compact unit. 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.

Able to draw and transfer thermal energy from the air, under the right circumstances, such as new builds with a high degree of insulation, using heat pumps for hot water represents an efficient way to significantly reduce the carbon emissions of a building. As the cost of grid electricity closes on that of gas, ongoing savings garnered from operating a hybrid ASHP based system, plus the reduction in CO₂ emissions makes the technology a truly attractive prospect for the latest commercial building projects.  New innovations in heat pump technology and refrigerants this coming year will further enhance the advantages of the technology cementing it position as a truly viable alternative for the provision of commercial-grade hot water.

For more visit Adveco’s renewables page

Non-domestic RHI Gains 12–month Extension

Originally set to finish at the end of March 2021, and in response to delays caused to building projects by COVID-19, the Government’s non-domestic Renewable Heat Incentive (RHI) has received a 12-month extension. In response to concerns raised by stakeholders that a significant number of existing projects would fail to meet the scheme closure application deadline of 31st March 2021, affected projects are now able to submit an extension application.

Those existing projects unable to commission and accredit to the scheme before the previous deadline now can extend these processes until 31 March 2022.

With increasing pressure to decarbonise in line with the Government’s ambitious net zero targets, the preservation of reliable and continued funding for the commercial sector is critical if organisations are to be further encouraged in the adoption of future-proof sustainable developments. With no clear, immediate replacement for the RHI, concerns had been raised regarding the lack of incentivisation for the commercial sector, as new schemes focussed on domestic installations. Given around 40% of UK greenhouse gas emissions are accounted for by heating, cooling, ventilation, the provision of hot water and lighting the built environment, and some 17% is generated by commercial building stock, it is clear that more help is required to drive the uptake of renewables and more sustainable systems if the UK is to achieve climate-neutral buildings by 2050.

Designed to provide financial incentives to increase the uptake of renewable heat by businesses, the public sector and non-profit organisations, the non-domestic RHI is currently applicable to air source heat pumps, such as the Adveco FPi range and L70, and solar thermal for commercial uses including large and small businesses, plus schools and hospitals. Administrated by Ofgem on behalf of the Department of Energy and Climate Change (DECC), tier one of the RHI incentivises non-domestic energy producers for either the life of the installation or 20 years as a maximum. If conditions are met, with equipment, including a generation meter, being installed by a microgeneration certification scheme (MCS) accredited installer, eligible businesses in England, Scotland and Wales will now continue to be paid for installations completed and commissioned before 2022.

Once successfully accredited, systems will receive quarterly payments per kilowatt-hour (kWth) of energy use, however, if metered as a multiple system, which includes either ASHP or solar thermal and a gas boiler, then payment is made purely for the heat generated by the heat pump or solar thermal aspect of the application.

The current 2020/21 (non-domestic) tariff are:

  • For new air source heat pumps – 2.79(p/kWh)*
  • For new solar thermal collectors less than 200kWth in size (tier 1) – 10.98(p/kWh)*

For specifiers and developers installing renewable heating systems on commercial buildings or small-to-medium-scale district heating projects, the extension also provides crucial financial support ahead of the Green Heat Network Scheme (GHNS) coming into force in April 2022.

*For more information on non-domestic RHI and the full conditions of eligibility, refer to the energy regulator Ofgem.