Which heat values did The Energy and Resources Institute (TERI) use to turn Ahmedabad's chemical-cluster tonnes and cubic metres into tonnes of oil equivalent (toe), and do the lines add up?

Gas converts at 8,750 kilocalories per standard cubic metre (scm) and power at about 861 per kilowatt hour (kWh). Coal works out at 4,514 per kg, inside the printed range, but wood at 3,726, above the profile's own 2,700 to 3,200. The four lines add to 144,550, not the printed 144,624.

Back-solving each line of Table 5.2.2

• Natural gas: 121 million scm = 105,872 toe, so 8,750 kilocalories (kcal) per scm. That is the figure Table 5.1.1 prints for Adani Gas.
• Coal: 18,000 tonnes = 8,125 toe, so about 4,514 kcal per kg, inside the printed 4,200 to 4,800.
• Biomass: 10,800 tonnes = 4,024 toe, so about 3,726 kcal per kg. Table 5.1.1 lists firewood as its only wood fuel, at 2,700 to 3,200, so the line works out above that range. Karnal's profile by the same authors prints 3,726 kcal per kg for firewood, so this looks like a value reused from there (our reading). The Ahmedabad table calls the line biomass, not firewood.
• Electricity: 308 million kWh = 26,529 toe, so about 861 kcal per kWh, close to the usual 860.

What the wood line does to the total

At 3,200 kcal per kg the 10,800 tonnes would be 3,456 toe, and at 2,700 it would be 2,916. The printed 4,024 is 568 to 1,108 toe higher, which is 0.4 to 0.8% of the cluster total. It does not change the picture. For your own unit, record wood in tonnes from the bills and use your supplier's heat value, not 3,726.

The total and the shares

• The four lines add to 144,550 toe. The table prints 144,624, which is 74 toe or 0.05% more.
• The lines give gas 73.2%, electricity 18.4%, coal 5.6% and biomass 2.8%, so the profile's 73, 18, 6 and 3 are right.
• Section 5.2.1 says heat is 89.2% of a typical unit's energy. The unit table gives 89.9% for dyes and pigments (478.2 of 531.8 toe) and 71.0% for other chemicals (129 of 181.8). Across the cluster, heat is 81.6% of the lines. The 89.2% sits close to the dyes and pigments row but is not that row's 89.9%, and the profile does not say how it was reached.

Converting your own gas and power the TERI way

• Gas: 300,000 scm x 8,750 kcal = 2,625,000,000 kcal = 262.5 toe (example figure)
• Power: 400,000 kWh x 860 kcal = 344,000,000 kcal = 34.4 toe (example figure)
• Total: 296.9 toe, heat 88.4% (262.5 / 296.9)

One toe is taken as 10 million kcal. The profile does not print its basis, but the chemical brochure of the Bureau of Energy Efficiency (BEE) pairs 151 kilograms of oil equivalent with 6.33 gigajoules, which is 41.9 gigajoules a toe, so the basis fits.

What Senseible does here

Senseible reads gas invoices, fuel invoices and electricity bills into monthly records in the units on the bill. The toe conversion here is for comparing with the cluster and is yours to do.

• Your MSME carbon number
• Ahmedabad chemical cluster: gas and carbon
• Vatva dye intermediate unit boiler CO2
• How to calculate specific energy consumption

Sources: TERI, Cluster profile report: Ahmedabad chemical cluster (SAMEEEKSHA), SAMEEEKSHA, Energy efficiency in chemical clusters: sectoral brochure, TERI for BEE, Cluster profile report: Karnal chemical cluster (SAMEEEKSHA)

Last reviewed 2026-11-05. Figures are TERI's Ahmedabad profile, 2020-21 data. The back-solved heat values and the 144,550 sum are our arithmetic.