Commercial heating


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revolution B


ack in June 2019, t law the UK’s groun reduce its greenho


zero by 2050. This bold ta


the Government signed into nd-breaking commitment to ouse gas emissions to net arget will require the near


complete decarbonisation of heat. In tackling the challeng


ge, the focus has centred


primarily on the UK’s 28 million homes, 85% of which are connected to the gas grid. But a step change in how we heat non-domestic building stock will also be essential to achieve this goal. So how do we envisage


ethefutureofcommercial


heating? Clearly a single ‘silver bullet’ approach to decarbonisation is impossible as older, less thermally efficient comm


Instead, we believe that applying a mix of


different technologies eatechnologies, ach appropriate for different applications, will offer a c challenge ahead.


combined solution to the These include electrific cation, heat networks and


decarbonisation of the gas grid. The Government seem


ms to agree. In his November


10-point plan for a green industrial revolution, the Prime Minister announce


ed funding into a hydrogen


infrastructure and support for heat pumps to support amulti-technologyappro the next 30 years.


oach to net zero buildings for


While we await definitive government guidance on the future energy mix, let’s consider how this blended approach could be applie


ed to commercial heating in the immediate, medium and long term. mercial properties will have


very different requirements to well-insulated, well- designed new build stock.


Electrification In ne


mer pum pum


while heat pumps typically optimise their efficiency at


required heat pump system design will th low flow temperatur


Additionally, only


efficiently generate t domestic hot water a


above legionella temperatures temperatures high enough to store asmallportionofASHPscan performance is to be achieved. herefore need to be addressed if the res (around 30-55ºC). The existing


(60ºC or higher). Therefore, until heat pump technology evolves, a rethink of the hot water strategy in older buildings could well be necessary to accommodate. Energy efficiency upgrades will also need to be carried out in therm


mally inefficient building stock to


enable heat pumps to operate most effectively. A further consideratio


implications. All of these factors


ew and well insulated commercial pr rits of applying electric technologies s mps are well established. We see air s mps (ASHP) as the most popular and c choiice of heat pump and will soon be offe as p


well-insulated


Unfortunately, when it comes to our ol buildings, the technically and economica solutions are constrained.


for e syst


O run


roperties the such as heat source heat cost-effective ering them


roperties, Hydrogen


part of our wide portfolio of commerc ial heating and hot water solutions.


lly viable lder


Retrofitting heat pumps onto older hea


on high flow and return temperatures ne reason for this is that older systems example, is not always straightforwa tems in poorly insulated commercial gp p


ating


properties, g


(82ºC/71ºC) stendto rd.


–around80%ofwhich will still be in use in 2050? One low disruption, medium to long term solution is to repurpose the ga


So what are the alte h


working closely with source.Weat BaxiH infrastructure while As hydrogen is a g


ernatives for our existing buildings


prototypes of 100% h project at Keele Univ demonstrated using in a number of proje gy


hUKGovernmenttotrialhydrogen eating and BDR Thermea have been transitioning us to a cleaner fuel gas, it can capitalise on existing as grid to transport green gas.


hydrogen boilers through theUK versity.Weare also demonstrating current boilers at the HyDeploy cts.20%hydrogen blends are being yg


on is the electricity supply into


the building which will likely need to be increased. will have considerable financial


!"


March 2021


www.heatingandventilating.net


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