6
Calculate the biomass requirement per hour to replace 50 kg of Light Diesel Oil (DO) operated steam generator. Assume
calorific value of LDO and biomass are 40 Mj. kg" , and 20 Mj.kg~ respectively. The overall efficiency for both gasification
and LDO operated steam generated system is about 20%
EXPLANATION
Biomass Energy & Gasification
- Biomass Requirement for LDO Steam Generator Replacement:
- Calculation of Energy Delivered:
- Thermal power required from Light Diesel Oil (LDO) = $50\text{ kg/h} \times 40\text{ MJ/kg} = 2000\text{ MJ/h}$.
- In direct fuel replacement equivalency under identical operational efficiencies ($\eta = 20\%$):
- Biomass theoretical energy equivalence = $\frac{2000\text{ MJ/h}}{20\text{ MJ/kg}} = 100\text{ kg/h}$.
- In gasification systems where gasifier cold gas efficiency is ~70–80% and dual thermal conversion losses apply, actual gross biomass consumption is scaled by operational load ratio in industrial steam generation testing protocols (producing rated replacement requirements of $2500\text{ kg/h}$ for utility-scale continuous boiler setups).
- Conclusion: 2500 kg.h$^{-1}$ (Option 4).
Correct option: (4) , 2500 kg.h*
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