Q4. Consider a biomass power plant which utilizes straw as fuel. Composition of

Question

Q4. Consider a biomass power plant which utilizes straw as fuel. Composition of the feed is given below: (16) Proximate Analvsis Ash Content Moisture Content Volatile matter content Fixed Carbon Content Ultimate Analvsis Composition 6.00 % 8.5 % 61.60 % 24.20 % 41.61 % 670 % 44.40 % 0.66 % 0.01% 02 1) Based on the above mentioned composition, estimate the gross calorific and net calorific values of the feed biomass. (2) 2) Assume the biomass feed rate is 200 kg/min entering at a temperature of 130°C while outside temperature is 25 °C. (Assume Specific heat of Biomass: 1.63 ± 007 J/g °C) Evaluate the heat rate introduced into the power plant with the biomass in kW. (2) 3) Consider that air is being entered 15 % in excess. Estimate the air required for fuel complete fuel combustion. (2) C+O2 CO2 4) Find out the volume composition of the product. (2) 5) If the air is inserted at 200 °C, what is the energetic content of air inserted? (2) (Assume heat capacity of air 1 kJ/kgK) 6) Evaluate the energetic content of the flue gases and steam. The exit temperature is 600 °C. (Assume the heat capacities to be following:) (3)

Explanation / Answer

1.ans.

Gross calorific value = 1/100(8,080 C + 34500(H- O/8) +2240 S) K Cal/g

= 1/100 (8,080 * 41.61 + 34500 (6.70 -44.40/8) + 2240 * 0.01) K.cal/g

= 1/100 ( 336,208.8 + 39675 + 22.4) K.cal/g

= 43,059.48 Kcal/g

Net calorific value = [G.C.V - 9/100 H *587]Kcal/g

= [ 43,059.48 - 9/100 * 6.70 *587]Kcal/g

=[43,059 - 353.961]Kcal/g

= 42,705.519 Kcal/g

  

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.