ENERGY EFFICIENCY ANALYSIS OF A BIOGAS PLANT WITH HEAT RECOVERY OF WASTE EFFLUENT HEAT
https://doi.org/10.15518/isjaee.2015.05.006
Abstract
The paper considers methane fermentation technology of bio waste fermentation with heat recovery of waste effluent heat. In order to improve the energy efficiency of a biogas plant the authors propose technological scheme of waste heat recovery effluent, which allows using biogas plants in regions with low average annual temperature. Based on the technique of thermal and thermodynamic analysis it is comparatively assessed the energy efficiency of two biogas plants: the traditional and the recovery of waste heat of the effluent. The paper presents a detailed calculation of digester thermal and energetic efficiency, because it is a key unit of the scheme of the apparatus. The use of heat pump in biogas plant heating system will increase the thermal efficiency of the scheme from 39% to 46%, and the exergy efficiency from 6% to 31%.
About the Authors
D. A. Kovalev
All-Russian Research Institute for Electrification of Agriculture
Russian Federation
PhD (technics), Head of the Department of Bioenergy, Environment and Nanotechnology of All-Russian Research Institute for Electrification of Agriculture (ARIEA)
Russian Federation
PhD (technics), Head of the Department of Bioenergy, Environment and Nanotechnology of All-Russian Research Institute for Electrification of Agriculture (ARIEA)
A. A. Kovalev
All-Russian Research Institute for Electrification of Agriculture
Russian Federation
PhD (technics), Senior Researcher of the Laboratory of Bioenergy Plants of All-Russian Research Institute for Electrification of Agriculture (ARIEA)
Russian Federation
PhD (technics), Senior Researcher of the Laboratory of Bioenergy Plants of All-Russian Research Institute for Electrification of Agriculture (ARIEA)
Yu. V. Karaeva
KazanSC of RAS
Russian Federation
PhD (technics), Senior Researcher of the Laboratory of Energy-Saving Technologies and Advanced Energy Sources, KazanSC of RAS
Russian Federation
PhD (technics), Senior Researcher of the Laboratory of Energy-Saving Technologies and Advanced Energy Sources, KazanSC of RAS
I. A. Trakhunova
KazanSC of RAS
Russian Federation
Junior Researcher of the Laboratory of Energy-Saving Technologies and Advanced Energy Sources, KazanSC of RAS
Russian Federation
Junior Researcher of the Laboratory of Energy-Saving Technologies and Advanced Energy Sources, KazanSC of RAS
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Review
For citations:
Kovalev D.A., Kovalev A.A., Karaeva Yu.V., Trakhunova I.A. ENERGY EFFICIENCY ANALYSIS OF A BIOGAS PLANT WITH HEAT RECOVERY OF WASTE EFFLUENT HEAT. Alternative Energy and Ecology (ISJAEE). 2015;(5):45-54. (In Russ.) https://doi.org/10.15518/isjaee.2015.05.006
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