Synergy in the pig and biogas production system : an examination of heat value
Using manure to produce biogas has multiple environmental benefits. However, today Swedish agricultural biogas is generally considered unprofitable meaning it’s use is not widespread. This study examines how to properly value heat produced in a combined heat and power unit, an area that has not been...
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
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SLU/Dept. of Economics
2019
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| Sumario: | Using manure to produce biogas has multiple environmental benefits. However, today Swedish agricultural biogas is generally considered unprofitable meaning it’s use is not widespread. This study examines how to properly value heat produced in a combined heat and power unit, an area that has not been studied extensively before. It focuses on how heat can produce synergy effects in pig production by using heat to maintain temperature while increasing ventilation and air quality, a common problem in pig production. A dual case study was preformed where a simulation model described heat use and increased pig performance. Two farms where chosen based on their relative latitude in Sweden to provide maximal temperature differences. Results show that pig performance is improved between 0,82 and 0,95 SEK/kWh used from biogas. This is above the market price of heat and contributed to biogas profitability much more than previous research has suggested. A sensitivity analysis also show that pig performance increase could decrease a ot before heat value is below the break even for biogas profitability. Altering heat use between summer and winter remain a problem in heat utilization from biogas also in this study. |
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