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Table 1: estimation of carbon savings from renewables
Energy sourceSystem size consideredContribution from energy sources to total building energy use (%)Estimate of annual carbon savingsPercentage of carbon dioxide emissions
Solar water heating (renewable)Annual thermal output: 350,000 kWh/yr5.00%80 tonnes CO2/yr4.40%
CHP1 x 100 kWe14.20%53 tonnes CO2610,000 kWh/yr (m)
Site-wide energy efficiency measures (figures adjusted after omission of individual boilers)1228124 kWh/yr17.50%280 tonnes CO2/yr15%
Combination of solar water heating, CHP and energy efficiency 36.70%413 tonnes CO2/yr22.30%