jouleWise

The journey/ worked example

Where you are.
What moves next.

One plant, walked stage by stage: a 10 MW beverage site in Karnataka on grid electricity and gas-fired steam, taken through open access, storage, heat electrification and 15-minute settlement. Every figure on screen is recomputed from the same model as you change the inputs — nothing is a stated result.

A worked illustration, not a client case study and not a savings calculator. The numbers are internally consistent for this plant; yours are established in a baseline.

Stage 1 of 5

Where the example plant starts: grid, gas and diesel

A 10 MW beverage plant that buys everything and optimises nothing. Electricity comes from the DISCOM at ₹8 a unit, steam from three PNG boilers and distribution from a diesel fleet. Carbon sits in three separate budgets, and no one owns the number.

SCOPE 2 · IMPORTDISCOM grid · 66 kV₹8.00/kWh · 63.0 MU/yriBoiler house · PNG3×6 TPH · η 92% · SCOPE 1 15,351 tCO₂iCIP · 65 °CPasteuriser · 95 °CChilling · CO₂BottlingExample beverage plant · 10 MW · KarnatakaBOTTLING LINE · 145.7 gCO₂ / litre · 18% GREENDIESEL FLEET · 40 TRUCKS · 1,103 tCO₂iGRIDRENEWABLEGAS / CSPDIESEL / STONESSTORAGE & CONTROL
Levers & limits
jouleWise
Page 1 / 5

Where the example plant starts: grid, gas and diesel

A 10 MW beverage plant that buys everything and optimises nothing. Electricity comes from the DISCOM at ₹8 a unit, steam from three PNG boilers and distribution from a diesel fleet. Carbon sits in three separate budgets, and no one owns the number.

Grid63.0 MUGas7.91M SCM10 MW · BEVERAGE PLANT18%GREENElectricity63.0 MUHeat0% off gasFleet0% electric
18%
system green share+0 pts vs today
Energy spend
97.8₹ Cr/yr
↓ ₹0.0 Cr vs today
Blended electricity
₹8.00/kWh
on 63,000 MWh
Annual carbon
61,184tCO₂e
Scope 1 + 2
Scope 1 · direct
16,454tCO₂e
boiler fuel + diesel
Scope 2 · purchased
44,730tCO₂e
grid import @ 0.71
Connected load
10.0MW
grows as heat electrifies

Energy mix63.0 MU/yr

  • Grid import63.0
  • Open access solar0.0
  • Open access wind0.0
  • Rooftop solar0.0
  • BESS shifted0.0

What this stage changes

Grid at ₹8.00/kWh63 MU/yr on DISCOM tariff — ToD peaks unmanaged, no exchange access
3 × 6 TPH PNG boilersPNG at ₹55/SCM, 24×7. Efficiency caps at 95% — thermodynamics, not effort
Diesel fleet outside the gate40 trucks on short-haul distribution, Scope 1 and invisible
No measurement layerCarbon reported annually from invoices, never per 15-minute block or per SKU

Thermal load by band0% off gas

≤ 80 °CPNG boiler
80 – 135 °CPNG boiler
135 – 180 °CPNG boiler
180 – 210 °CPNG boiler

The technologies

Levers & limits

DISCOM HT tariff incl. demand charges, Karnataka
Hard limit 95% — flue-gas and radiation losses cannot be recovered further
120 km/day, 3.5 km/l, 300 operating days

Assumptions

Grid ₹8.00 · RE share 38% · 0.71 tCO₂/MWh (CEA, south grid) · PNG ₹55/SCM at 1.94 kgCO₂/SCM · Solar ₹3.50 and wind ₹3.80 ex-bus · OA charges ₹1.00/kWh · Steam 100,800 t/yr at 2.6 GJ/t

jouleWise
The case

Decarbonisation is now the cheaper path

Nothing in this example is a pilot. Every lever is commercially available today, and each one can be bought as a service or funded under ESCO shared savings, so the plant pays for delivered electricity and heat rather than equipment. The blended cost falls at every stage. Technology is not the constraint.

₹0
plant capex,
every stage bought as a service

Today → 2032

Energy spend
₹97.8→₹45.6Cr / yr−53%
Blended electricity
₹8.00→₹4.43/ kWh−45%
Annual carbon
61,184→1,382tCO₂e−98%
Green share
18%→99%of delivered energy+81 pts

Cumulative saving

₹189 Cr
2026 – 2032, against today’s bill
26
27
28
29
30
31
32

Where the ₹52.2 Cr/yr comes fromlevers applied in the order the journey introduces them · ₹ Cr/yr, constant 2026 prices

Today’s energy bill
₹97.8
Boiler efficiency92% → 95%
−₹1.4
Rooftop solar4.0 MWp behind the meter
−₹3.3
Open access solar28 MW · ₹4.50 landed
−₹10.7
Open access wind20 MW · ₹4.80 landed
+₹0.8
Battery storage30 MWh · ₹2.50/kWh discharge
−₹4.8
Heat pumpsto 135 °C · COP 2.3
−₹18.4
CSP solar thermal100% of the 135–180 °C band
−₹5.1
Thermal storage stones100% of the 180–210 °C band
−₹0.6
Electric fleet40 trucks · 100% electrified
−₹3.1
Algorithmic tradingDAM · GDAM · RTM · ₹0.40/kWh
−₹5.6
At stage 5
₹45.6
Electricity-as-a-Service₹4.43 / kWh
Solar, wind and storage through long-term electricity agreements, built and run off the plant’s balance sheet. The plant pays per unit, below grid tariff.
Heat-as-a-Service100% of load
Heat pumps, solar thermal and thermal storage inside the plant boundary, owned and run by us. The plant buys steam and hot water per unit, at or below what it pays for gas today.
ergOS operations₹5.6 Cr / yr
Subscribed, not installed. ergOS forecasts, schedules, bids and settles every 15 minutes, and in this example the trading gain more than covers it.
What it takes to start
01
Someone who owns the number
In most plants energy is still a side function of operations. Someone has to own the tariff, the schedule and the carbon number the way finance owns the balance sheet.
02
A platform, not a spreadsheet
Four generation sources, 96 settlement blocks a day and one exchange add up to too many decisions, made too fast, for a spreadsheet and a monthly review.
03
Moving early
Open access, group captive and Heat-as-a-Service get cheaper with volume. The plants that move first set the terms; the rest take the tariff they are given.
Modelled for an illustrative plant, not a client result. Reported year-one ergOS outcomes are up to 25% lower electricity cost and up to 65% of electricity from solar and wind; results vary with state, tariff and load profile. Constant 2026 prices with no grid tariff escalation, so a rising tariff widens the gap. Each stage’s run-rate is applied across its year span. Heat pump and storage-stone output is costed at the electricity it consumes; a service fee sits inside the spread against ₹55/SCM gas.

The six stages/ in general

The same order,
for any plant.

The worked example above runs a specific site. The stages underneath it are the general shape of the work — and measurement runs through all six, not just the last.

01

Baseline

Where are we today?

Electricity, fuel, heat, load patterns, cost and emissions — measured, not estimated. Portable heat metering goes on the loops that matter.

Metered baseline · load profile · Scope 1 and 2 position
Build the carbon position
02

Plan

What should we do first?

Priorities, dependencies, investment and a phased business case. Sequencing follows the economics of your state and your process, not a template.

Roadmap · phased business case · dependencies
Size a portfolio
03

Transition electricity

How do we source cleaner electricity?

Intrastate and ISTS solar and wind, rooftop solar, storage and green-market purchase — orchestrated together so the landed cost, not the headline tariff, is what falls.

Contracted green supply · open access approvals · ABT metering
Size a portfolio
04

Transition heat

Which fuel uses can we replace?

Heat recovery first, then heat pumps on duties up to 120 °C, then thermal storage so heat is made in the cheapest blocks. Higher-temperature duties stay on fuel and are named as such.

Displaced boiler fuel · recovered waste heat · thermal store
Test a heat duty
05

Operate

How does the system work together?

ergOS meters electricity, steam, fuel and water every 15 minutes, forecasts, schedules and dispatches heat pumps and storage against price.

15-minute metering · forecasting · scheduling
Value the scheduling
06

Measure and disclose

How do we demonstrate progress?

esgOS turns the same metered record into Scope 1, 2 and 3, BRSR Core-format, CBAM, CDP and customer disclosures — traceable back to the meter.

Audit-ready disclosure · traceable evidence
Build the carbon position

In short/ The journey

The journey is an interactive worked example that walks one 10 MW beverage plant in Karnataka through six stages, from grid electricity and gas-fired steam to green electricity, electrified heat and metered disclosure.

Six stages: baseline, plan, transition electricity, transition heat, operate, and measure and disclose. Each stage carries levers — tariff, boiler efficiency, fleet size, renewable capacity, heat pump share — and recomputes the plant's cost, renewable share and carbon from one model. It is a worked illustration, not a client case and not a savings calculator; a plant's own numbers come from a baseline.

What to take away

  • The worked plant is a 10 MW beverage site in Karnataka on DISCOM electricity and piped natural gas steam.

Questions this page answers

Does electricity always come before heat?
Not as a rule. The order is set by the tariff, the grid emission factor and the process temperatures. Electricity usually comes first because low-cost green electricity makes every unit of heat-pump heat cheaper and cleaner.
Where do I start?
At the baseline. Measurement begins there and never stops; every later claim is measured against it.
Reviewed 2026-10-08 · jouleWisePlain-text version

Start/ one plant

Run this
on your site.

The model above is the same one we build against a real baseline: your bills, your load profile, your fuel records and your process temperatures.