CHP and Heat Pumps Warwick University Conference 10th October 2016 Paul Woods – Head of Energy Partnerships East London – paul.woods@engie.com
Combined Heat and Power and Heat Pumps compared Electricity Demand E0 Grid Power Station F0 Additional fuel for Ehp Ehp Heat Demand H Heat pump heat pump CoP = H / Ehp
Combined Heat and Power and Heat Pumps compared ΔE = E0 - Echp Grid Power Station Electricity Demand E0 Grid Power Station F0 Additional fuel for ΔE Additional fuel for Ehp Echp Ehp Heat Demand H F0 CHP Heat pump CHP CoP = H / Δ E divide by F0 CoP = . CHP heat efficiency . (grid eff – CHP elec eff) heat pump CoP = H / Ehp
Comparison of heat sources
What is an electricity emissions factor? Current grid annual average Average grid factor for the next 3 years – Part L basis Operating marginal emissions factor – determines short-term operation of existing plant Build marginal emissions factor – long term policy approach Weighted average of operating and build marginal factor (UNFCCC) 15 year forward prediction of 50/50 average of operating and build marginal factor (Zero Carbon Hub report, 2010)
Zero Carbon Hub Report
Is there a case for both CHP and Heat Pumps? Gas CCGT 2050
January and July 2035 – extrapolated High wind, low CO2, low price Low wind, high CO2 high price