Page 188 - Biofuels Refining and Performance
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Processing of Vegetable Oils as Biodiesel and Engine Performance  171


                                                     Jatropha
              45                                     Karanja
                                                     Putranjiva


              40
             Viscosity (cSt)  35







              30



              25
                    0      1       2      3      4       5
                               Acid concentration (%)
           Figure 6.1 Viscosity versus acid concentration of jatropha, karanja,
           and putranjiva oils at 40 C.





              22
                                                       45° bTDC
                                                       40° bTDC
              20                                       35° bTDC


              18
             Efficiency (%)  16




              14


              12


              10
                     Diesel     Jatropha    Karanja    Putranjiva
                                       Oils
           Figure 6.2 Brake thermal efficiency at various timings of diesel and 20%
           vegetable oil blends at 1-kW brake power, 1200 rpm, and 20 compression
           ratio.
   183   184   185   186   187   188   189   190   191   192   193