Recent projects

2014- 2015 Heat pumps for district heating – research and modelling

Working with Element Energy for DECC looking at scope for heat pumps on heat networks.  Work includes survey of heat networks with heat pumps and development of model of heat pump performance in different heat networks.  Model includes for the range potential heat sources and heat network configuration and loads.

2015- Community owned DH study for Hinksey Oxford

Carbon Alternatives instigated a bid to the Urban Community Energy Fund to undertake a feasibly study for a small DH scheme based around an open air swimming pool, community centre, some council housing and a primary school.  The proposal is to utilise solar thermal and a water source heat pump.   This work is being done with the Low Carbon Hub in Oxford.  Link to report :

Hinksey Pool
Hinksey Pool

2015- 2016 DECC funded research – Improving performance of existing heat networks through innovative use of Smart heat metering

Working with Guru Systems to automate the identification factors reducing DH efficiency and to economically appraise remedial measures.  Use of data patterns from customer heat meters and energy centre heat meters to automatically characterise common faults and issues. Working on identifying issues reducing system efficiencies on 4 DH sites and assisting in methodology to identify these issues in the heat meter data.  Carbon Alternatives is developing low cost remedial measures which are being implemented at 4 sites and helping assess the performance and cost impacts of the improvements.

HIU flow and temperatrure

The Guru System tool, now in operation can be found at and contains a wealth of free to access data on measured heat demands and demand diversity curves.

HIU Testing – Additionally Carbon Alternatives has developed an HIU performance test standard as part for this work and is the technical lead on the testing of 6 market leading HIUs.  This testing is highlighting the key importance of good HIU specification and commissioning to achieve efficient, low heat loss DH in operation.  The testing includes the development and calculation of volume weighted return temperature, as an indicator of HIU performance based on real world HIU operating conditions. Test standard and the HIU results can be found at



2014- 2015 CIBSE – Heat Networks Code of Practice

Contributor to the development of the Heat Networks Code of Practice document and the consultant training course.  And now I’m registered Heat Network Consultant.


2014- 2016  Ongoing work for SSE

Working for SSE at North West Bicester Ecotown and Greenwich Sq.  I’m being given the opportunity by SSE to continue the projects I started whilst at SSE.  Both these projects include condensing heat recovery from the CHP to increase heat output.  At Greenwich this means the CHP delivers 13% more heat than the standard with no loss of electricity output or extra gas consumption.

Bicester CHP delivery
Bicester CHP delivery

The extra heat recovery come with the potential problem that the CHP will not run if the return temperature is above 55C.  But actually there is a benefit here, as for the DH network to be efficient the return temperature should be way below 55C.  40-45C year round is common place in Denmark – have a look the DH at town of Skagen  So this CHP limitation makes sure the DH and heat customers are commissioned correctly and deliver low return temperatures.  With the loss of CHP revenue if return temperatures rise the problems get fixed and the CHP keeps running and generating financial and CO2 savings.  It’s very common that DH / heat load commissioning is poor in the first place and this CHP restriction ensure good commissioning is a done – as the contractor’s not going to get paid if the CHP is not working it gets the ….

2015- 2016  Contributions to HNDU Studies for Oxford and Slough

I’ve worked for BRE on elements of their DH feasibility study for Oxford City Council / Oxford University.  I am currently working with Greenfield Consulting for Slough Borough Council on the scope for more heat networks in Slough – focusing on heat from SSE Slough Heat and Power Plant.