Calculate the volume of a fixed-dome-type biogas digester for the output of two cows. Also calculate the thermal power available from biogas. Use the following data: Retention time: 40 days, Dry matter produced 2 kg/day/cow, Biogas yield=0.22 m3/kg of dry matter, percentage of dry matter in cow dung=18%, Density of slurry=1090 kg/m3 Burner efficiency=60%, Heating value of biogas=23 MJ/m3

Calculate the volume of a fixed-dome-type biogas digester for the output of two cows. Also calculate the thermal power available from biogas. Use the following data: Retention time: 40 days, Dry matter produced 2 kg/day/cow, Biogas yield=0.22 m3/kg of dry matter, percentage of dry matter in cow dung=18%, Density of slurry=1090 kg/m3 Burner efficiency=60%, Heating value of biogas=23 MJ/m3

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.3P

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Question

Biogas yield=0.22 m3/kg of dry matter,
percentage of dry matter in cow dung=18%,
Density of slurry=1090 kg/m3

Burner efficiency=60%,

Heating value of biogas=23 MJ/m3

. [Ans: 140.55 W]

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