1. CHP and Heat Pumps Warwick University Conference 10th October 2016 Paul Woods – Head of Energy Partnerships East London –

2. 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

3. 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

4. Comparison of heat sources

5. 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)

6. Zero Carbon Hub Report

7. Is there a case for both CHP and Heat Pumps?
Gas CCGT
2050

8. January and July 2035 – extrapolated
High wind, low CO2, low price
Low wind, high CO2 high price