Industrial heat pumps for the Pune manufacturing belt
Tetra Heat Pump is a product of Promethean Energy Private Limited. We build industrial heat pumps that deliver continuous process heat to 120°C. The duty set in the Chakan and Ranjangaon belts sits at the efficient end of that range. Alkaline degrease at 55 to 80°C, zinc phosphating at 50 to 60°C, hot rinses and component washing are all in range. Every paint oven is out of range.
Two things are specific to Pune, and both work in the buyer's favour. The Maharashtra regulator has approved a declining industrial tariff, and our technical sales engineering for this belt is based here.
What Chakan and Ranjangaon make, and what heat that needs
Both belts are vehicle assembly, automotive component and general engineering, and that produces an unusually clean thermal split. The heat that matters in those plants is a pre-treatment line: degrease, phosphate, rinse, then dry. Everything before the oven is a bath, and every bath is hot water below 100°C.
That is the best-shaped duty set this equipment sees anywhere. Efficiency falls as output temperature climbs. A plant whose entire addressable load sits between 50 and 80°C works at the comfortable end of the curve.
| Duty | Temperature | In range |
|---|---|---|
| Alkaline degrease | 55 to 80°C | Yes |
| Zinc phosphating | 50 to 60°C | Yes |
| Hot rinses between stages | Below 100°C | Yes |
| Component and parts washing | 55 to 80°C | Yes |
| Paint shop air handling reheat | Below 100°C | Yes |
| Electrocoat bath | 28 to 32°C, a cooling duty | Not served |
| Electrocoat cure oven | 190°C | Not served |
| Bake oven | 140 to 200°C | Not served |
| Powder cure oven | 177 to 204°C | Not served |
The electrocoat bath is the interesting row. It is held at 28 to 32°C and has to be cooled, a few metres from tanks that need heating. So one water source machine can do both jobs on one electricity input. The automotive page works that through in full.
What the Maharashtra tariff does to the case
The MSEDCL HT-I energy charge is ₹8.44 per kVAh for FY2026-27. The demand charge is ₹650 per kVA per month. Both are before duty and any time-of-day adjustment.
Two features of that matter more than the headline. Maharashtra bills HT-I per kVAh, not per kWh. So a plant running poor power factor pays more per useful unit than ₹8.44 suggests. Correcting power factor is a lever most plants here have not pulled.
And the regulator has approved a declining path, from ₹8.44 per kVAh in FY2026-27 to ₹7.45 by FY2029-30. A buyer here is therefore weighing a fuel priced off an imported commodity against an electricity price on a published downward track. That is a hedging argument on the public record, and it is specific to this state.
| Incumbent fuel | Per useful kWh thermal | Breakeven COP | Verdict |
|---|---|---|---|
| PNG, Gujarat industrial reference | ₹7.24 | 1.17 | Beaten by any working machine |
| Furnace oil | ₹7.70 | 1.10 | Beaten by any working machine |
| Light diesel oil | ₹12.58 | 0.67 | Widest margin here |
| Electric resistance | ₹8.70 | Just under 1 | Beaten by definition |
| Biomass briquette | ₹2.54 | 3.33 | Close. Cost is not the argument |
| Coal, delivered | ₹1.94 | 4.35 | Heat pump loses on running cost |
Breakeven COP is computed at the Maharashtra HT-I energy charge. The gas row uses the Gujarat industrial reference price, so substitute your own contracted rate. The full arithmetic and every assumption behind it are here.
Will your sanctioned load take it?
It often will, and twelve months of bills will tell you. A heat pump adds electrical load equal to its thermal duty divided by the coefficient of performance at your output temperature. The boiler it replaces was drawing power for pumps, fans and controls, and that power comes off the increment.
Take twelve months of bills, find the highest recorded maximum demand, and subtract it from your sanctioned demand. That difference is your headroom. Many plants in this belt carry more than they expect, because contract demand was set for a line configuration that has since changed.
Where an enhancement is needed, the MSEDCL schedule applies and the security deposit is recalculated at twice the average billing cycle. Those are real costs. Put them in the capital request, so they do not arrive in the first bill. The full procedure and the charges are here.
Why the belt is asking now
Three things have converged.
Customer audits reached the tier suppliers. Vehicle manufacturers are asking their supply chain for verified emissions data. That turns onsite fuel combustion into a line item with a number attached, often for the first time.
The electricity price is falling on a published path while fuel is not. That inverts the assumption most capital cases in this belt were built on.
Boilers in the belt are reaching decision points. A certificate that will not renew, or a shell past the age where working-pressure derating bites, forces a choice that would otherwise have been deferred.
Where service comes from
Our technical sales engineering for this belt is based in Pune. Our service engineering base is in Delhi, and our design and engineering is in Mumbai. Our published response window is 24 to 48 hours, and it does not depend on location.
A buyer should establish three things, from us and from anyone else. Where is the nearest engineer? What spares are held, and where? What carries the load if a machine stops mid-shift? Those answers are set out here.
What to bring to a first conversation
- 1Your tank schedule: each bath, its setpoint and the hours it is held.
- 2Twelve months of fuel invoices, with quantity and price.
- 3Twelve months of electricity bills, showing sanctioned demand, recorded maximum demand and power factor.
- 4Any warm stream you are currently rejecting, with its temperature and flow.
- 5The next scheduled shutdown window.
Those five turn a quotation into a specification. The savings calculator will put a running cost against them first. The specification page sets out exactly what the equipment delivers and where it stops.
Tell us the duty and we will tell you if it fits
Send the tank schedule and the fuel you are burning today. That is enough for us to say what share of your heating bill a heat pump can reach, and what it cannot.