Abstract
In the present work, economic and environment analyses of multi-generational micro gas turbine systems are reported for a grid-independent dairy farm in Ontario, Canada. Onsite anaerobic digesters utilize farm waste to produce carbon neutral biogas for combustion in the micro gas turbine modules. A range of micro gas turbines coupled with absorption refrigeration units and an organic Rankine cycle are driven by the recovered waste heat to meet the cooling and electrical needs of farm sizes between 250 and 6000 cows. Farms of these sizes are observed to be capable of having their cooling and electricity needs met with micro gas turbines ranging in capacity from 100 to 1000 kW output. Environmental performance is maximized when the net output of the system just matches the energy requirement of the farm, and produces no excess electricity. Thus to minimize the environmental impact, but remain financially viable, various configurations are suggested for farm sizes under 2000 cows.
Highlights
From consumers’ point of view, there is growing interest for companies to produce products that are eco-friendly over their life cycles (Collins, 2011)
Economic and environmental analyses are performed for an integrated multi-generational system for a dairy farm based on renewable energy, which has previously been assessed with energy and exergy analyses (Cuomo et al, 2018a, Cuomo et al, 2018b)
All of the dairy farm’s current energy demand (Table 1) must be met via the integrated multi-generational system based on renewable energy
Summary
From consumers’ point of view, there is growing interest for companies to produce products that are eco-friendly over their life cycles (Collins, 2011). A feature of such products often is that all processes in the production operation are powered by net-zero carbon emission energy sources. Dairy farmers producing milk or related products may be expected to operate using net-zero carbon emission energy sources (Loo and Koppejan, 2010). Economic and environmental analyses are performed for an integrated multi-generational system for a dairy farm based on renewable energy, which has previously been assessed with energy and exergy analyses (Cuomo et al, 2018a, Cuomo et al, 2018b). 2. All of the dairy farm’s current energy demand (Table 1) must be met via the integrated multi-generational system based on renewable energy
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