Heat is the largest energy end-use with over 50% of global energy consumption

Heat is a form of energy that determines the temperature, volume, and state (gas, liquid or solid) of a material. It can be transferred from one object to another, to raise or lower temperatures, and is most commonly transferred from warmer to cooler matter. It can be produced by converting other forms of energy, such as chemical energy stored in fuels or electrical energy, in boilers, furnaces, pumps or electric heaters. Heat energy allows us to warm and cool our buildings, provides us with hot water and the ability to cook our food. Heat is also required for industrial production of steel, chemicals, food and drink.

Heat accounts for a large proportion of greenhouse gas emissions; the decarbonisation of heat is thus vital to reach emission reduction targets. With various means of production and range of uses embedded in all aspects of our lives, heat constitutes a complicated system that is difficult to lead down a single desired path. As such, fewer countries currently have policies for renewable heat than they do for renewable electricity and transport.

Unlike electricity which can be decarbonised solely by feeding renewable energy into the grid, decarbonising heat also depends on changes at the point of use and may require millions of homes to replace their gas or oil-fired boilers with a new technology. There is no one-size-fits-all solution, since the fuel mix and the means of delivery to the end-user vary greatly from one country to another. Thus, a multiple-technology approach towards low carbon heat is most likely required, resulting in a mix of pathways. These could include electrification using heat pumps, using sustainably-produced hydrogen as a fuel, and setting up district heating networks which can incorporate a range of low-carbon heat sources as well as waste heat from various industrial and urban processes. Heat energy efficiency is also key for emissions reductions and advancements can be made in thermal performance of buildings (e.g. insulation) and the efficiency of heating systems. Wider deployment of combined heat and power (CHP), as it produces electricity and useful heat at the same time, can also help to improve the efficiency of the wider energy system. However, public acceptance, high upfront capital costs, and additional infrastructure and storage requirements pose significant challenges to implementing such transformations of the heat system.

Read our Energy Insights on heat.

Find out energy professionals’ expectations for the future sources of heat in the UK.

Learn more about district heating or combined heat and power by browsing our online knowledge resources.

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Events and training

EI LIVE free webinar | Community Partnerships for Low Carbon Heat

14-07-2020
This webinar is hosted by the EI East Midlands branch.

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EI LIVE | Energy Efficiency: The Road to Net Zero

16-09-2020
Discover the latest approaches and strategies in energy efficiency that can help the UK reach net zero greenhouse gas emissions by 2050.

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EI LIVE | Level 3: Advanced Energy Manager

28-09-2020
This 10-day virtual blended course is an advanced qualification aiming to support experienced energy managers to further advance their careers by gaining the skills and knowledge required to function successfully at a senior level and be able to manage energy across a wide range of business areas, a...

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EL LIVE Free Webinar | Powering net zero

8-10-2020
Join our free webinar on 8 October 2020 at 9.00 - 10.40 BST

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Middle East Sustainability Forum

9-12-2020
This is part of Middle East HSE and Sustainability Week - for the HSE Forum please click here. Sustainability: unmasking a new global landscape "Rather than compounding the [COVID-19] tragedy by allowing it to hinder clean energy transitions, we need to seize the opportunity to help accelerate the...

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Technical guidance publications

IP 618: Determination of cold filter blocking tendency

2020
This standard specifies a method for the determination of the cold filter blocking tendency (CFBT) and cold filterability of middle distillate fuel oils containing biodiesel from 0 % to 20 %, at temperatures between ambient and -5 °C where the end use demands an exceptional degree of cleanliness...

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EI Research report: Investigation into the minimum auto-ignition temperature of fuels in open-air conditions

2020
This study was conducted in order to evaluate the AITs of typical UK fuels in order to validate measurement expectations for these fuels, and thus to allow considerations on whether current EI guidelines needed revision.This report covers three phases of work carried out between August 2016 and June...

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Battery storage guidance note 2: Battery energy storage system fire planning and response

2020
This publication is free to download. Please log in to see the download option.This publication provides guidance on how to respond to BESS fires. It represents the 'current state' of knowledge (in 2019), but also identifies gaps in knowledge. The guidance covers primarily non-domestic battery insta...

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Code of safe practice for contractors and retailers managing contractors working on filling stations

2020
This publication is intended for all contractors, subcontractors and self-employed persons who are required to carry out work on a filling station, and for retailers who are required to manage contractors whilst on their premises. It focuses on safety and good practice procedures whilst referencing ...

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Decommissioning within the offshore UK oil and gas industry: a practical guide to worker health protection

2020
The primary focus of this technical publication is to highlight and describe the potential health hazards and risks to workers involved in the decommissioning of offshore oil and gas structures, and explain how these risks are potentially magnified during decommissioning. Health planning, management...

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