# Chemicals

> The Chemicals playbook is jouleWise's typical engineering approach for specialty, fine and bulk chemical plants: reactors, columns, evaporators — most of it below 120 °c.

Canonical: https://joulewise.com/industries/chemicals  
Publisher: jouleWise Advisory Services Pvt Ltd, Noida, India · Spain  
Reviewed: 2026-10-08  
Status: company page

## In short

One provider for green electricity, green heat and the data that proves both — from the tank farm to the tanker. For a chemicals producer, carbon has moved from the annual report into the purchase order. Buyers ask for a product carbon footprint, regulators set intensity targets, and the steam bill is still set by fuel prices you do not control. Much chemicals heat is delivered as steam to duties that only need hot water: jackets, preheaters, tank heating, vacuum distillation and evaporation sit between 60 and 120 °C. Atmospheric reboilers, high-temperature reactions and thermal-fluid duties stay where they are.
## Reactors, columns, evaporators — most of it below 120 °C.

- **The situation.** A chemicals site runs reactors, columns, evaporators and dryers around the clock, with steam from gas, coal, furnace oil or diesel boilers feeding jackets, reboilers, tank heating and effluent evaporation. Much of that duty sits between 60 and 120 °C, while chillers and cooling towers on the same site reject heat to the air. Customers increasingly ask for a product carbon footprint per kilogram, not a company total.
- **The gap.** Electricity, steam and ESG reporting are bought and run separately. Solar is sized without the steam load; boilers are tuned without a plan for low-cost electricity; carbon per product is estimated once a year from invoices. Each fix leaves money and carbon on the table.
- **What we do.** jouleWise designs, finances, builds and operates the whole stack: green electricity from intrastate and ISTS solar and wind, rooftop solar, storage and the green market; heat pumps to 120 °C on jacket loops, preheating and evaporation, fed by heat recovered from chillers and condensers; thermal storage; ergOS to meter and orchestrate every 15 minutes; esgOS to turn the same data into product-level carbon.
- **Why it compounds.** Low-cost green electricity lowers the cost of every unit of heat a heat pump makes. Recovering condenser heat raises the heat pump's source temperature and its COP. Storage lets heat be made in the cheapest blocks. Savings from one layer fund the next.
- **The value.** Up to 25% lower electricity cost on grid tariff and up to 65% of electricity from solar and wind (reported, year 1 of ergOS); heat at or below today's fuel cost on the duties inside the range; a metered, per-product carbon record.
- **How to engage.** Capex, ESCO shared savings, Heat-as-a-Service or Electricity-as-a-Service — we can fund it. Electricity and heat can be taken separately or together.
- **First step.** A four-week energy assessment on one plant: electricity bills and 15-minute data, steam and fuel records, portable heat metering on jacket loops, reboilers and evaporators, and the product carbon data map — ending in one business case.

## Why now: Your customers want carbon per kilogram.

For a chemicals producer, carbon has moved from the annual report into the purchase order. Buyers ask for a product carbon footprint, regulators set intensity targets, and the steam bill is still set by fuel prices you do not control.

- **Product carbon footprints.** Global customers in pharma, personal care, coatings and agrochemicals now ask suppliers for carbon per kilogram of product, with a method they can audit.
- **CBAM.** The EU's carbon border mechanism already covers fertilisers and hydrogen, and its scope is being reviewed for further chemicals. Exporters need verified embedded emissions.
- **Carbon Credit Trading Scheme.** India sets greenhouse-gas emission-intensity targets sector by sector, and chemical sectors are among those brought in. A metered baseline is the starting point for meeting them or earning credits.
- **Steam is the hidden bill.** Jackets, reboilers, tank heating and evaporators run on boiler steam at fuel prices you do not set. Much of that duty is below 120 °C and can move to heat pumps.
- **Zero liquid discharge.** Where ZLD conditions apply, effluent evaporation is one of the largest steam users on site. Mechanical vapour recompression and heat pumps cut that steam sharply.
- **Disclosure.** BRSR Core-format reporting, lender diligence and customer questionnaires all draw on the same plant data.

## The intervention map: Tank farm to tanker. Eleven levers, none inside the chemistry.

Raw materials and solvents are stored, reacted in jacketed vessels, separated and recovered in columns, concentrated in evaporators, dried, packed and despatched. jouleWise acts at eleven points — electrical, thermal and data — never inside a validated process.

1. **Green sourcing** (power, Electricity). Intrastate and ISTS solar and wind contracted through open access for a round-the-clock load.
2. **Connectivity and metering** (power, Electricity). Open access approvals, connection agreement and ABT metering at the incomer.
3. **Rooftop solar** (power, Electricity). Solar on warehouse and utility roofs, sized from measured daytime load.
4. **Battery storage** (power, Electricity). Storage to shave peaks, ride through grid events and carry solar into the evening.
5. **Heat pumps on jacket loops** (heat, Heat). Hot water and low-pressure steam to 120 °C for reactor jackets, feed preheating and tank heating, with the boiler kept as back-up.
6. **Recover condenser heat** (heat, Heat). Chiller condensers and cooling-tower water become the heat pump's source, raising its COP and taking load off the towers.
7. **Evaporation without steam** (heat, Heat). Mechanical vapour recompression and heat pumps on effluent and product evaporators — the largest steam cut on many sites.
8. **Thermal storage** (heat, Heat). Hot water made in the cheapest electricity hours and drawn by batch campaigns, so heat follows price rather than the shift.
9. **ergOS control** (data, Data · ergOS). 15-minute metering of electricity, steam, heat and water; batch and utility scheduling against price.
10. **Product carbon** (esg, ESG · esgOS). kWh, steam and kg CO₂ per kilogram of product, from metered data, for customer PCF requests and BRSR Core.
11. **Raw materials and solvents** (esg, ESG · esgOS). Purchased feedstock and solvent movement for Scope 3, estimated and labelled where supplier data is missing.

Illustrative plant. Actual intervention map built site by site in the baseline.

## Green electricity: Low-cost green electricity.

A chemicals site is a round-the-clock load: agitators, pumps, compressors, chillers and cooling towers never stop. We size the green portfolio to that flat load, and add the heat pumps' demand to it before anything is contracted.

- **Plan.** Meter-data due diligence: bills, load survey, rooftop and captive parameters. Solar, wind, hybrid, BESS and exchange electricity optimised together, capex or opex, with each state's ToD, banking and open access charges in the landed-cost model. Outcome: RE-100 roadmap · size, location, savings, NPV
- **Implement.** RfP over a 25-year horizon, developer evaluation, reverse auction, PPA and shareholder agreements (26% SPV equity for captive status), open access approvals and connection agreement. Outcome: Green electricity contracted · ~3 months once planning closes
- **Meter and log.** ABT meters at injection and drawal points — main and check meters on CTs and PTs of the required accuracy class — plus data loggers on every incomer, heat pump, steam, fuel and water line. Installed, tested, sealed and linked to the SLDC and to ergOS. Outcome: Every source and load visible in 15-minute blocks
- **Orchestrate.** ergOS forecasts 96 blocks, schedules with the SLDC, trades DAM, GDAM, RTM and GTAM, manages banking and battery health — and now dispatches heat pumps and thermal storage against price. Outcome: For the life of the assets

## Heat: Steam where it must be. Heat pumps everywhere else.

Much chemicals heat is delivered as steam to duties that only need hot water: jackets, preheaters, tank heating, vacuum distillation and evaporation sit between 60 and 120 °C. Atmospheric reboilers, high-temperature reactions and thermal-fluid duties stay where they are.

| Duty | Temperature | Heat pump? |
|---|---|---|
| Tank and line heating (raw materials and viscous products) | 40–80 °C | yes |
| Process water and CIP (vessel and line cleaning) | 50–85 °C | yes |
| Reactor jacket heating (batch reactors · hot water loops) | 60–120 °C | yes |
| Feed preheating (before reactors and columns) | 60–110 °C | yes |
| Evaporation and concentration (MVR or heat pump · effluent and product) | 60–100 °C | yes |
| Vacuum distillation · solvent recovery (reboilers under vacuum) | 80–120 °C | yes |
| Atmospheric distillation reboilers (steam stays) | 140–200 °C | stays on fuel |
| High-temperature reactions (thermal fluid · fuel-fired) | 180–300 °C | stays on fuel |

- **Heat sources we reuse.** Chiller condensers, cooling-tower water, compressor jackets and column overheads — a chemicals site rejects heat all day next to duties that buy it.
- **Evaporators first.** Where effluent or product evaporation runs on steam, mechanical vapour recompression is often the single largest saving — and it is a heat pump.
- **Sized from metered heat.** Portable heat meters log flow and temperature on jacket loops, reboilers and evaporators for two to four weeks before anything is sized.

## Economics: Low-cost electricity drives low-cost heat.

What one kWh of useful process heat costs, and what it emits, depending on where the heat comes from. The heat pump cuts cost on any electricity; green electricity is what cuts the carbon.

| Route | ₹ per kWh of useful heat | kg CO₂ per kWh-th |
|---|---|---|
| PNG-fired boiler (₹55/SCM · 85% efficiency) | 6.22 | 0.221 |
| Furnace oil boiler (₹62/L · 85% efficiency) | 6.57 | 0.334 |
| Diesel (HSD) boiler (₹90/L · 85% efficiency) | 10.59 | 0.315 |
| Coal-fired boiler (₹8,000/t · 4,000 kcal/kg · 75% efficiency) | 2.29 | 0.487 |
| Heat pump on DISCOM electricity (₹8.5/kWh · COP 3.5) | 2.43 | 0.205 |
| Heat pump on green open access (₹5.5/kWh landed · COP 3.5) | 1.57 | 0.000 |
| Heat pump in solar blocks + store (₹4.0/kWh · COP 3.5) | 1.14 | 0.000 |

Illustrative only, not an offer. Assumptions: PNG ₹55/SCM, 10.4 kWh/SCM, 1.95 kg CO₂/SCM; HSD ₹90/L, 10.0 kWh/L, 2.68 kg CO₂/L; furnace oil ₹62/L, 11.1 kWh/L, 3.15 kg CO₂/L; coal ₹8,000/t, 4,000 kcal/kg, 1.7 kg CO₂/kg, 75% efficiency; boilers otherwise at 85%. Grid 0.716 kg CO₂/kWh; green electricity treated as zero-emission on a market basis with green attributes retired. Heat pump COP 3.5 reflects hot water near 80 °C from a recovered 35–40 °C source; COP falls as delivery temperature rises. All values are replaced with metered site data in the baseline.

## Roadmap: Baseline. Electricity. Heat. Proof.

1. **Energy assessment** (Weeks 1–4). Bills, load survey, steam and fuel records, portable heat metering on jacket loops, reboilers and evaporators, product carbon data map. Outcome: Signed-off energy, heat and carbon baseline
2. **Proposal** (Weeks 4–8). Electricity, heat or both: solution design, business case and the financing model — capex, ESCO or as-a-service. Outcome: One business case — electricity, heat, ESG
3. **Meter and log** (Weeks 6–12). ABT metering at the incomer and data loggers on electricity, steam, heat and water lines — the measured base every later step is sized, settled and reported on. Outcome: ergOS live on metered data
4. **Electricity live** (From ~3 months). Open access contracted and approved; rooftop solar and storage where they fit; every source orchestrated against demand on ergOS. Outcome: Green electricity flowing
5. **Heat live** (Pilot, then scale). Condenser heat recovery and one heat pump loop first — jackets or an evaporator — then the remaining duties below 120 °C, with the boiler kept as back-up. Outcome: Steam displaced, measured on ergOS
6. **Operate and disclose** (Every block · every year). ergOS runs electricity and heat; esgOS publishes product carbon, BRSR Core-format, CBAM and customer disclosures with an audit trail. Outcome: Assurance-ready numbers

Timelines indicative; confirmed after the energy assessment and dependent on state approvals, equipment lead times and process change-control windows.

## 24-hour dispatch

A chemicals site never stops: agitators, compressors and chillers hold the base up all night. The heat pumps carry jacket hot water and the evaporator round the clock, with batch campaigns in the morning and afternoon and the store charged in solar hours.
## Facts

- Heat duties and temperatures: Tank and line heating 40–80 °C (heat pump); Process water and CIP 50–85 °C (heat pump); Reactor jacket heating 60–120 °C (heat pump); Feed preheating 60–110 °C (heat pump); Evaporation and concentration 60–100 °C (heat pump); Vacuum distillation · solvent recovery 80–120 °C (heat pump); Atmospheric distillation reboilers 140–200 °C (stays on fuel); High-temperature reactions 180–300 °C (stays on fuel).
- PNG-fired boiler: ₹6.22 per kWh of useful heat, 0.221 kg CO₂/kWh-th
- Furnace oil boiler: ₹6.57 per kWh of useful heat, 0.334 kg CO₂/kWh-th
- Diesel (HSD) boiler: ₹10.59 per kWh of useful heat, 0.315 kg CO₂/kWh-th
- Coal-fired boiler: ₹2.29 per kWh of useful heat, 0.487 kg CO₂/kWh-th
- Heat pump on DISCOM electricity: ₹2.43 per kWh of useful heat, 0.205 kg CO₂/kWh-th
- Heat pump on green open access: ₹1.57 per kWh of useful heat, 0.000 kg CO₂/kWh-th
- Heat pump in solar blocks + store: ₹1.14 per kWh of useful heat, 0.000 kg CO₂/kWh-th
- Plant areas with a lever: Reactor jacket loops, Evaporation without steam, Condenser heat recovery, Feed and tank preheating, Product carbon per kg.

## Assumptions and limits

- Illustrative only, not an offer. Assumptions: PNG ₹55/SCM, 10.4 kWh/SCM, 1.95 kg CO₂/SCM; HSD ₹90/L, 10.0 kWh/L, 2.68 kg CO₂/L; furnace oil ₹62/L, 11.1 kWh/L, 3.15 kg CO₂/L; coal ₹8,000/t, 4,000 kcal/kg, 1.7 kg CO₂/kg, 75% efficiency; boilers otherwise at 85%. Grid 0.716 kg CO₂/kWh; green electricity treated as zero-emission on a market basis with green attributes retired. Heat pump COP 3.5 reflects hot water near 80 °C from a recovered 35–40 °C source; COP falls as delivery temperature rises. All values are replaced with metered site data in the baseline.
- Timelines indicative; confirmed after the energy assessment and dependent on state approvals, equipment lead times and process change-control windows.

## Questions and answers

**Does it replace my boiler?**  
For loads up to 120 °C, yes — as the primary heat source. The boiler usually stays on standby and for any loads above that range.

**What if electricity is expensive?**  
Each kWh of electricity returns three to four kWh of heat, so heat costs roughly a third of the electricity price. On green open access, the carbon falls close to zero as well.

**What does the site need?**  
Spare electrical capacity, space near the heat users and a steady heat demand. A hot-water store smooths peaks and lets the unit run in the cheapest blocks.

**Is it proven?**  
It is the same refrigeration cycle as the chillers already on your site, run for heat. Industrial units are in service worldwide in food, chemicals, pharma and textiles.

## Related

- [Heat Pump Studio](https://joulewise.com/studios/heat-pump)
- [Discuss your plant](https://joulewise.com/contact)

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