Understanding LCV, MCV, and HCV Coal Calorific Grades for Industrial Boiler Procurement
A guide for procurement teams on choosing a coal calorific grade (GAR) that fits boiler design and steam needs.
- GAR shows the heat energy per kilogram of coal as received.
- Three reference grades: LCV, MCV, HCV.
- Calorific value alone is not enough; read the COA too.
Why does calorific alignment matter?
In thermal coal procurement for power plants and industrial steam boilers, Gross As Received (GAR) calorific value indicates how much heat each kilogram of coal produces as received, expressed in kcal/kg.
Boilers are designed for a specific fuel range. If coal calorific value falls well outside that range, heat output may fall short, or fuel consumption rises to reach the same steam output. That is why the calorific grade should be matched to boiler design from the start.
Three reference grades at PCA
In PT Pelita Cakra Alam's trading profile, thermal coal is grouped into three reference ranges:
The higher the GAR, the more energy per ton. For the same heat demand, a higher grade needs less tonnage. But price and availability differ by grade, so the best choice depends on boiler design and total procurement cost.
| Grade | GAR reference | Main use (PCA profile) |
|---|---|---|
| LCV (Low Calorific Value) | 4,200 – 4,700 kcal/kg | Domestic and regional power plants, cement plants |
| MCV (Medium Calorific Value) | 5,000 – 5,500 kcal/kg | Textile, pulp & paper, smelters, large boilers |
| HCV (High Calorific Value) | 5,800 – 6,500+ kcal/kg | Metallurgical applications, high-technology power plants, export |
Don't stop at GAR: read the Certificate of Analysis (COA)
Beyond GAR, procurement teams should assess supporting parameters:
Operating issues such as slagging (molten ash sticking to furnace walls) and fouling (deposits on heat-exchange tubes) are often tied to ash characteristics. A COA per shipment lot is therefore a more reliable reference than a general range.
- Total Moisture (TM): total water content. Water absorbs heat and lowers net energy.
- Ash: mineral residue after combustion. High ash adds ash-handling load and can affect the boiler.
- Volatile Matter (VM): affects ignition behaviour and flame stability.
- Total Sulfur (TS): relates to emissions and corrosion.
How PCA approaches it
Every PCA commercial offer refers to COA data verifiable from supplier partners in Kalimantan and Sumatra. GAR ranges on this site are initial references; binding specifications are set through the COA and contract.
Products Referenced in This Article
Low-calorific thermal coal with a reference GAR of 4,200–4,700 kcal/kg for coal-fired power plants and cement plants.
Medium-calorific thermal coal with a reference GAR of 5,000–5,500 kcal/kg for textile, pulp & paper, smelters, and large boilers.
High-calorific coal with a reference GAR of 5,800–6,500+ kcal/kg for metallurgical applications, high-technology power plants, and export markets.
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