FEATURE Hot Water For Healthcare M R


ecent research by the University of Exeter sets out the scale of the challenge the NHS faces if it is to achieve sustainability targets set under the government’s net zero plan by 2040. One area that accounts for a consistent and definitive need within the NHS is the provision of hot


water, a process which can account for as much as 30% of daily energy demands. Once implemented it can deliver an immediate reduction in carbon emissions and operational costs. We expect healthcare facilities will look for hot water to be generated at a commercial scale via multiple localised systems that each provide hot water to wash hand basins and showers for a dedicated area. This typically will see systems arranged on a ward-by-ward basis, but appliances may also supply hot water to local shared spaces where appropriate. Such systems will demand hot water be stored and distributed at a minimum temperature of 60°C. Working flows could be required up to 75°C with minimum return temperatures not below 50°C. To achieve net zero and meet NHS mandates for DHW, a typical sustainable application would see


hot water generated via a pair of parallel-arranged hot water cylinders to ensure redundancy. These would be sized to provide 60% of the hot water demand for the area served based on a peak 15-minute duration loading. The heat into the cylinder would come from a combination of solar thermal collectors and an air source heat pump working in conjunction to guarantee the preheat temperature. The design of the system allows for the heat pump to contribute to the incoming cold water. That ensures 45°C while taking full advantage of the COP of the heat pump. The solar thermal is employed after the heat pump to heat the water from 45°to 50 or 60°C depending on the time of year. Should temperatures of up to 75°C be required, a high-temperature electric heat source would


be used to top up what the solar could not manage. We would suggest specifying an electric boiler to avoid issues of scale in hard water areas. By delivering preheat through both the ASHP and solar thermal system, demands on more costly electric heating are considerably reduced.


https://adveco.co/sectors/healthcare/


Step into Renewable Heating as Alpha Launches E-Tec Hybrid Heat Pump Solution


W


ith the UK urging homeowners to be more environmentally conscious in helping to achieve net zero ambitions by 2050, leading heating manufacturer


Alpha has launched a brand-new h ybrid heating system, E-Tec Hybrid. The new packaged heat pump solution offers the perfect pathway into renewable heating without losing the reliability offered by the tried-and-tested gas boiler. Offering a full hybrid solution, the Alpha E-Tec 33 boiler is connected with the Alpha E-Tec EHP external heat pump unit. Combine this with the Smartech controls, and you have high efficiency heating and hot water, providing consumers with a green heating alternative. Working to be as efficient as possible, the system cleverly combines live energy prices with the outdoor temperature to choose the most efficient combination to heat your home; and when hot water is required, it is provided instantly by the gas boiler. To ensure that your property is heated efficiently, Alpha’s new hybrid system automatically adjusts the heating flow and water temperature in the radiators depending on demand and also the outside temperature. The maximum you can heat the water can also be adjusted for the heating circuit; however, this will


still vary depending on outside temperatures as the system calculates the most efficient one required. For homes without an airing cupboard or those looking to free up some cupboard space, the E-Tec Hybrid is perfect as the hot water is instantaneous and the need for hot water storage is no longer needed. The new system can also run-on existing pipework meaning that the homeowner doesn’t need to worry about any drastic changes to their heating system, such as upgrading radiators.


Features: • •


Always chooses the cheapest fuel source based on the current energy tariff Instantaneous hot water on demand; no need for stored hot water


• No need to upgrade existing heating system; minimising install costs • • • •


Simple hydronic layout; easy to install, typically one-day installation Hydrogen blend compatible (up to 20% hydrogen) Anti-freeze protection, without the need of glycol


5 Year Warranty on approved and correctly installed/maintained installation


Daniel Wilden, renewable product manager for Alpha, comments: “The new E-Tec Hybrid solution offers the best of both worlds in renewable technology of an air-to-water heat pump with a familiar gas condensing boiler. With more and more people looking to move towards renewable energy and save money on their energy bills, the E-Tec Hybrid is the perfect solution in moving towards a greener heating alternative.


alpha-innovation.co.uk/E-TecHybrid Read the latest at: www.bsee.co.uk


Advertorial


Carrier Introduces Higher Capacity Ultra-low GWP HFO Screw Chillers up to 1.3MW


ONTLUEL, France, 27th Oct. 2022 – Carrier has expanded its flagship AquaForce® Vision 30KAV liquid chiller range with hydrofluoroolefin (HFO) refrigerant R-1234ze with the addition of five new higher-capacity models, enabling customers to meet the requirements of applications up


to 1,300kW without the need to double-up units, saving money, space and improving installation speed. Carrier is part of Carrier Global Corporation (NYSE: CARR), the leading global provider of healthy, safe, sustainable and intelligent building and cold chain solutions. There are five new Carrier AquaForce Vision 30KAV liquid chiller sizes, covering 900kW, 1000kW, 1100kW, 1200kW and 1300kW cooling capacities. The AquaForce Vision chillers are based on variable-speed screw compressors designed to deliver outstanding energy efficiency and environmental performance, plus quick and easy installation and servicing. The innovative, award- winning AquaForce Vision 30KAV supports Carrier’s 2030 Environmental, Social & Governance (ESG) Goals of reducing customers’ carbon footprint by more than 1 gigaton. All chillers in the range are designed to exceed European Ecodesign requirements for efficiency and operating sound levels. The top efficiency version (option 119+) has a Seasonal Energy Efficiency Ratio (SEER) of up to 5.55 for comfort cooling applications, and a Seasonal Energy Performance Ratio (SEPR) of up to 6.95 for high- temperature process cooling duties. Use of ultra-low global warming potential (GWP) refrigerant R-1234ze with a reduced charge ensures


low direct carbon-equivalent emissions, while close matching of compressor speed to cooling load and optimisation of chiller performance reduce energy use and help minimise indirect emissions. The entire AquaForce Vision 30KAV capacity range is available with a wide range of options, including a very low-noise version, electronically commutated (EC) fans, and partial and total heat recovery heat exchangers. For more details: https://www.carrier.com/commercial/en/uk/products/air-conditioning/air-cooled- chillers/30kavize/index.html


www.carrier.com


Hamworthy Heating Releases New Tyneham Heat Pump Brochure


H


amworthy Heating, a trusted British manufacturer and supplier of commercial heating and hot water


products, has released a new Tyneham Heat Pumpbrochure, which highlights its latest monobloc air source heat pump offering, developed to meet the market demand for energy-efficient heating products. The new Tyneham heat pump range is the latest product offering from Hamworthy Heating. One of the lightest commercial heat pumps on the market, the range features a coefficient (COP) rating of up to 4.85 to provide efficient, low-carbon heating. Featuring seven models in the range with six nominal outputs of between 14 to 70kW, the Tyneham can be cascaded to achieve higher outputs in larger installations. Incorporating an inverter controller compressor to accurately match the heat demand, Tyneham heat pumps also use R32 refrigerant to deliver increased efficiencies with a lower Global Warming Potential (GWP). Split into concise and comprehensive sections, the new 32-page Tyneham heat pump brochure starts


with an introduction to heat pumps and the role they play in helping to reach the UK’s net zero goal. Featuring clear information on how heat pumps work and their benefits, the new brochure also takes an in-depth look at how to understand refrigerants, highlighting GWP differences. The new Tyneham heat pump brochure provides an in-depth look at the key benefits of each individual model in the range. Distinct icons highlight each model’s ErP rating, coefficient of performance (COP), weights and dimensions, whilst easy-to-read detailed technical information is displayed in chart format. In addition, each model in the range is accompanied by minimum installation clearances and a list of suitable accessories and options available. For those seeking a hybrid system, the new Tyneham Heat Pump brochure also highlights how the latest range of monobloc air source heat pumps can be combined with the Hamworthy Heating range of modular gas boilers. This option enables customers to match heat demand in the most effective and energy-efficient way. To highlight the efficiencies of heat pumps, the brochure also features a dedicated section on the COP


and explains how to calculate the ratio of heat produced, relative to each unit of electricity consumed in heat pumps. To demonstrate this, it also offers a series of comprehensive graphs to help assist with product selection. The new Tyneham Heat Pump brochure can be downloaded from www.hamworthy-heating. com/Products/Heat-pumps/Tyneham-air-source-heat-pump. For more information, please contact Hamworthy Heating on 01202 662 552 or by email at sales@hamworthy-heating.com


www.hamworthy-heating.com BUILDING SERVICES & ENVIRONMENTAL ENGINEER FEBRUARY 2023 29


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