How much of a Rajkot investment casting unit's energy bill is electricity?

In the Rajkot profile of The Energy and Resources Institute (TERI), electricity is 63% of investment casting energy but 69% of the energy bill: rupees (Rs) 1,290 million of Rs 1,865 million. That works out to about Rs 7.01 for each kilowatt-hour (kWh) in 2014-15.

The printed cluster table (2014-15)

• Electricity: 184 million kWh, 15,800 tonnes of oil equivalent (toe), Rs 1,290 million.
• Thermal (oil or gas): 2,610 tonnes of liquefied petroleum gas (LPG) and 8.9 million standard cubic metres, 9,175 toe, Rs 575 million.
• Total: 24,975 toe, Rs 1,865 million. Both columns add up.
• The text says about 70% of units use piped natural gas for shell baking and heat treatment, and the other 30% use LPG.

Power costs more per unit of energy

By toe, electricity is 15,800 / 24,975 = 63% and thermal fuel 37%. By rupees, electricity is 1,290 / 1,865 = 69% and thermal 31%. These shares are my division of the printed figures.

Electricity cost Rs 81,600 a toe against about Rs 62,700 for gas and LPG. The thermal row mixes gas and LPG, so that is an average of the two. Electricity worked out to Rs 1,290 million / 184 million kWh = Rs 7.01 a kWh, at 2014-15 prices.

A check on the Rs 7.01: the same profile prints electricity at approximately Rs 8.00 a kWh for high tension (HT) supply and Rs 9.00 for low tension (LT), inclusive of demand charges, and gives no year for them. At those prices the 500 tonne unit's 1.9 million kWh would cost Rs 15.2 to 17.1 million of its Rs 19.0 million bill, which leaves too little for gas. The unit rows tie better to Rs 7.01, so this page uses it, as the cluster average implied by the profile's own bill.

Typical units and the whole cluster

• 100 tonnes a year of castings: Rs 4.6 million, about Rs 46,000 a tonne.
• 500 tonnes a year: Rs 19.0 million, about Rs 38,000 a tonne.
• 900 tonnes a year: Rs 32.0 million, about Rs 35,600 a tonne.
• Cluster: Rs 1,865 million over about 48,000 tonnes, about Rs 38,900 a tonne. The larger the unit, the lower the energy bill per tonne in these rows.
• The text puts the cluster's turnover at approximately Rs 1,000 crore a year, so the energy bill is about 19% of it.

What to do with it

These are 2014-15 prices. Take your own twelve months of power and gas bills, divide the rupees by the tonnes of good castings, and set that beside the 35,600 to 46,000 range for scale, not as a target. Compare power and gas separately before deciding which line to look at first.

The 500 tonne unit in the profile (printed rows)

• Electricity: 1.9 million kWh. Gas or LPG: 100 toe. Total energy: 264 toe
• Bill: Rs 19.0 million for 500 tonnes = Rs 38,000 a tonne
• Power at the cluster's Rs 7.01: 1.9 million kWh x 7.01 = about Rs 13.3 million, about 70% of the bill (an estimate)
• Cluster: Rs 1,865 million / Rs 10,000 million turnover = 18.65%

The unit's power split is my calculation from the cluster's average price and may differ from the unit's own bill. Prices are 2014-15.

What Senseible does here

Senseible reads fuel invoices and electricity bills into monthly records, so the rupees and kWh are read from each bill and invoice. You divide by your own good tonnes; Senseible does not take tonnes. It is not a third-party verifier and does not issue credits.

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Sources: TERI, Cluster profile: Rajkot investment castings, 2015 (SAMEEEKSHA)

Last reviewed 2026-11-05. Prices and bills are for 2014-15. Check current tariffs and gas prices before comparing.