BSEE-JUL21-P14 Carlo Gavazzi Comment_Layout 1 27/05/2021 14:35 Page 14
BSEE
Accurate electricity metering will be critical in the transition from fossil fuels to low carbon electric heating and in charging electric vehicles to ensure the accurate monitoring of energy consumption and correct billing says William Darby, Managing Director of Carlo Gavazzi UK.
secure green future.
In November, Prime Minister Boris Johnson set out his vision for a cleaner, low-carbon future when the government published its Ten Point Plan. The initiative marks an important step towards reducing the UK's carbon emissions and addressing the looming climate crisis. One of the elements of the plan that will be significant in driving Britain's transition to a greener low- carbon future is the target to install 600,000 heat pumps every year by 2028. Electric heat pumps will help decarbonise the heating of new homes and business premises. Alongside the government's commitment to decarbonising heat it is also set to decarbonise transport with a ban on the sale of new internal combustion engine cars and vans by 2030.
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This move to an electric, low carbon future will increase the demand for metering to ensure both the accurate monitoring of electricity consumption in order to allocate energy costs and for customer billing.
William Darby, Managing Director of Carlo Gavazzi UK.
A key tenet of the Ten Point Plan is a £1.3bn investment in electric vehicle (EV) infrastructure to accelerate the rollout of charge points for electric vehicles in homes, streets and on motorways. This will be a major challenge: the Society of Motor Manufacturers and Traders estimate that Britain will need 2.8m roadside charge points in addition to those in homes and offices. Charging stations consume significant amounts of electrical power when EV drivers refuel their
he green industrial revolution will be key if the UK is to recover from the coronavirus
pandemic in a way that delivers a better, more
vehicles. The amount of power consumed needs to be metered to ensure fair and accurate cost allocation for the energy consumed in charging each vehicle. The Automated and Electric Vehicles Act 2018 (AEV Act) requires all charge points sold or installed in the UK to have smart functionality, which includes the ability to monitor and record energy consumption. There is already a similar requirement for public charge points under the Alternative Fuels Infrastructure Regulations 2017: these require an infrastructure operator to ensure that all recharging points "incorporate intelligent metering systems". An 'intelligent metering system' means "an electronic system that can measure energy consumption, providing more information than a conventional meter and can transmit and receive data using a form of electronic communication". For three phase applications, such as public fast charge points, Carlo Gavazzi's EM340 or EM24-E1 energy analyser are the perfect solution. Both meters are MID certified making them suitable for cost allocation and sub-metering and for fiscal/legal sub-billing for commercial and residential three phase EV charging applications. For residential charge points applications, Carlo Gavazzi's single phase energy meter, Type EM111 is suitable for active energy metering and can measure imported and exported energy. Alongside its commitment to greener transport the government has also committed to making the heating of homes, schools and offices greener and more energy efficient with its ambitious target to role out both air source and ground source heat pumps.
Most of the 600,000 heat pumps set to be installed every year by 2028 will
INDUSTRY COMMENT Metering and billing
be in new-build homes, which will no longer be permitted to use gas for heating. However, increasing numbers of heat pumps will be installed in existing homes and businesses, where they will replace gas or oil-fired boilers.
The installation of heat pumps in existing properties is currently supported by the Domestic and Non-Domestic Renewable Heat Incentive (RHI) which, for the purposes of this scheme, includes a heat pump installation that supplies more than one dwelling.
From 22 May 2018, any heat pump installed under the Domestic RHI must have electricity metering arrangements in place to enable its performance to be monitored. All such meters used to claim payment under the RHI need to comply with the 2014 EU Measuring Instruments Directive (MID) and fall within accuracy Class A, as defined in Annex MI-003 of the MID. Some heat pumps have built-in meters and monitoring devices, known as ‘on-board meters’. An on- board electricity meter is integrated into the heat pump. Another metering option is to use a standalone electricity meter that measures the electricity
consumption of your heat pump. The electricity meter will likely have to be purchased in addition to the heat pump and be installed alongside it. For single phase new heat pump metering applications, Carlo Gavazzi's EM100 series of energy meters offer a cost effective, compact and MID certified solution. While the EM300 series is an MID certified meter for 3-phase suitable for both commercial and domestic applications.
Where accurate meters need to be retrofitted to existing heat pumps, Carlo Gavazzi have additional
solutions within its EM100, EM200 and EM300 range depending on requirements and preference. All meters are ideal for measuring energy consumption and the main electrical variables of single-phase or three-phase loads.
The Domestic RHI is set to end on 31 March 2022, after which financial support for domestic heat pump installations will be covered under a new Clean Heat Grant scheme. This will target support to existing households and small non-domestic buildings to facilitate the installation of heat pumps. As with the RHI, accurate metering of electricity consumption by the heat pump will be key to ensuring the success of the new scheme.
It is clear that ditching gas and oil heating in favour of cleaner, greener electric heat pumps will have huge environmental benefits. These benefits can be further enhanced by extending the lifetime and reliability of the heat pump compressor motor by eliminating the start capacitor. Carlo Gavazzi's High Dynamic Motor Starter (HDMS eliminates the need for a starting capacitor altogether. It features an innovative algorithm that ensures sufficient torque is generated to soft start the single phase capacitor start/capacitor run (CSCR) motors used in some heat pump compressors.
Carlo Gavazzi’s soft starters optimise scroll compressor start-up while delivering unmatched inrush current protection. The RSBS, RSBD and RSBT scroll compressor soft starters are suitable for single and three-phase controlled motor starts respectively to help heat pump manufacturers further extend the lifetime and reliability of their equipment to further enhance the UK's transition to a cleaner low- carbon future.
14 BUILDING SERVICES & ENVIRONMENTAL ENGINEER JULY 2021
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