§ Mark TamiTo ask the Secretary of State for Trade and Industry (1) what proportions of energy supply is supplied by combined heat and power schemes; [22332]
(2) what proportion of the UK's energy requirements were produced by combined heat and power schemes in each of the last 10 years. [22334]
§ Mr. WilsonThe available information is as follows. CHP statistics were not compiled on an annual basis before 1993.
Percentage Proportion of UK gross inland energy consumption from CHP Proportion of electricity Proportion of UK gross supplied (gross) by all UK generating companies provided by CHP 1993 2.8 4.0 1994 2.7 3.4 1995 3.2 4.8 1996 3.0 4.8 1997 3.0 5.1 1998 3.1 5.5 1999 3.1 5.8 2000 3.1 6.5 Source:
Digest of United Kingdom Energy Statistics 2001 Tables 6A (and corresponding tables in earlier Digests), 1.11 and 5.12
While electricity generated by CHP schemes has almost doubled since 1993, heat generation has increased by only 6 per cent. This is because gas turbines working at a 105W higher power to heat ratio have increasingly displaced steam turbines (with lower power to heat ratios) as the main prime movers in CHP plant.