Rapport SGC 198 Bio-Propane from glycerol for biogas addition

Figure 20The distribution of the cost of production (kr/kWh) for the three different cases.It is obvious that the cost of the feedstockdoes influence the cost of production; the costs varyfrom 1.43 to 2.40 kr/kWh in the propane case with internal hydrogen generation, 1.711 to 2.35in the external hydrogen case and 0.64 to1.43 in the ethane case. It is however apparent thatthe ethane configuration will give a lower cost independent of feedstock cost with a 50% per-of thecentile of 0.92 kr/kWh (50% of the 10 000 cases are below 0.92 kr/kWh) ). In the caseannual cases, the difference is somewhat narrowerr and the ethane case is less favorable athigher glycerol feedstock costdue to the higher consumption, figure 21.Figure 21The annual production costs in kkr at different feedstock costs.When annual cost is investigated, the unit using the least glycerol feedstock (the propane withexternalsupply) is the one with the smallest standard deviationof the three units, ~60000 kr.In the case of the propane withinternal generation the standard deviation is ~90 000 kr and in19