Do the savings, costs and carbon dioxide totals in the Alwar oil mill manual add up?

Mostly. The 11 rows of the Bureau of Energy Efficiency (BEE) Alwar manual add to rupees (Rs) 95.76 lakh saved for Rs 189.8 lakh spent. Its 23 month payback is 23.8 on the sums, and the kilowatt hours (kWh) behind its carbon dioxide line are 105,000 to 113,000 more than its sections give.

The summary table, row by row

• Savings, cost, payback: Rs lakh, Rs lakh, months.
• 1 Eco ventilators: 10.91, 2.34, 3. 2 Efficient motors: 69.65, 172, 30. 3 T5 for 40 watt tubes: 1.9, 3.0, 19. 4 Translucent sheets: 0.8, 0.6, 9.
• 5 Lighting at 210 volts: 0.21, 0.21, 12. 6 250 watt high pressure vapour (HPSV) lamps: 0.5, 0.8, 19. 7 150 watt HPSV lamps: 0.75, 1.7, 27. 8 Power factor controller: 10.2, 9.1, 11.
• 9 Halogen to compact fluorescent: 0.29, 0.032, 2. 10 Generator idle running: 0.384, no cost, no payback. 11 Generator exhaust pipe: 0.168, 0.03, 2.
• Printed total: 95.76, 189.8, 23.

What ties and what does not

• The savings add to 95.762 and the costs to 189.812, matching the printed 95.76 and 189.8.
• Payback: 189.8 / 95.76 x 12 = 23.8 months. The manual prints 23.
• Motors: the summary says Rs 69.65 lakh and 30 months. The motor section says about Rs 70.0 lakh and 29 months. 172 / 70 x 12 = 29.5 and 172 / 69.65 x 12 = 29.6.
• The motors are 73% of the savings (69.65 / 95.76) and 91% of the cost (172 / 189.8). The other ten rows together save Rs 26.11 lakh for Rs 17.81 lakh, a payback of 8.2 months.
• The manual uses Rs 4.8 a kWh. The eco ventilator row prints Rs 4.96 a kWh, motors Rs 4.97 and T5 tubes Rs 4.45. Every other row with a kWh figure is within about 3% of Rs 4.8.

The carbon dioxide line

• Chapter 4 says 1,000 units of generation save 0.86 tonnes of carbon dioxide (CO2), and puts the cluster's potential at around 1,750 tonnes, from about 2,036,450 kWh (printed as 20, 36,450).
• 2,036,450 x 0.86 / 1,000 = 1,751 tonnes, so the CO2 line ties to its own kWh.
• The kWh printed in the sections add to 1,923,545: eco ventilators 220,000, motors 1,400,000, T5 42,660, translucent sheets 16,250, 250 watt lamps 10,410, 150 watt lamps 15,625, power factor 212,500, halogens 6,100.
• Add the 100 watt bulb swap's 3,140 and the stabiliser's 4,375 (Rs 0.21 lakh at Rs 4.8, our conversion) and the sum is 1,931,060. That is still about 105,000 kWh short of 2,036,450. The gap to 1,923,545 is 112,905.
• The 1,751 tonnes ties to electricity alone, so the 1,680 litres of diesel look to be left out (our reading from the match).

How to use the manual

• Quote single rows with your own counts, not the cluster total. Quote the motors row apart from the rest, since it drives the payback.
• Swap the 0.86 for today's grid factor of 0.675 kg a kWh, and the old tariff for yours.

The totals, rebuilt

• Savings: 10.91 + 69.65 + 1.9 + 0.8 + 0.21 + 0.5 + 0.75 + 10.2 + 0.29 + 0.384 + 0.168 = 95.762 lakh
• Costs: 2.34 + 172 + 3.0 + 0.6 + 0.21 + 0.8 + 1.7 + 9.1 + 0.032 + 0 + 0.03 = 189.812 lakh
• Other ten rows: 95.762 minus 69.65 = 26.112 saved; 189.812 minus 172 = 17.812 spent; 17.812 / 26.112 x 12 = 8.2 months
• CO2 at 0.86: 2,036,450 kWh x 0.86 / 1,000 = 1,751 tonnes. At 0.675, the financial year 2025-26 grid factor: 2,036,450 x 0.675 = 1,375 tonnes. On the sections' own 1,923,545 kWh: 1,298 tonnes
• Diesel measures: 1,680 litres x 2.645 kg = 4,444 kg, about 4.4 tonnes, extra

All rupee, kWh and litre figures are the manual's, at its date. 2.645 kg of CO2 a litre is the diesel factor Senseible uses: the Intergovernmental Panel on Climate Change 2006 net calorific value and emission factor, with the diesel density of 0.83 kg a litre from the Central Electricity Authority database.

What Senseible does here

Senseible reads fuel invoices and electricity bills into monthly records, so your own kWh and diesel litres are on file by month, to set beside any figure from a report. It does not rebuild a report's totals for you.

• Alwar efficient motor reports by size
• Alwar mills: electricity per quintal of seed
• Which grid factor BEE's old reports use
• Alwar manual: 124,000 tonnes of oil or seed
• Carbon calculators

Sources: Bureau of Energy Efficiency and Confederation of Indian Industry, Manual on energy conservation measures in the Alwar oil mill cluster (SAMEEEKSHA), Central Electricity Authority, CO2 Baseline Database for the Indian Power Sector (grid factor 0.675 kg CO2 per kWh, financial year 2025-26; diesel density 0.83 kg a litre, Appendix B)

Last reviewed 2026-11-06. Every figure is the manual's own, from the Bureau of Energy Efficiency Small and Medium Enterprises (SME) programme, at its tariff of Rs 4.8 a kWh and diesel at Rs 32 a litre. Re-price with your own tariff before you quote a payback.