03728nas a2200385 4500 20260818095848.0 290998s1992 th r 000| eng d .b10243458 AIT Thesis no.ET-92-8 Fu Xiaofeng Energy management in corn alcohol distilleries in China Bangkok : Asian Institute of Technology, 1992 103 leaves : ill. Thesis ; no. ET-92-8 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering Thesis (M.Eng.) - Asian Institute of Technology The energy consumption pattern in two corn alcohol distilleries in China, Liaoning Province, were investigated and analyzed. The electri city consumption was about 1 MJ e and steam consumption about 18.5 MJth per liter pure alcohol (1 p.a.) in bot h distilleries. Cooking and distillation consumed about 34 % and 56% of the total thermal energy , respectively. This study focused on analyzing the energy conservation potential of a) the vapor recompression cyc l e (VRC) system in distillation processes and b) biogas generated by anaerobic digestion of wastewaters (slops). As already mentioned, the largest energy consumer is distillation wit h a share of 56% (Longguan) and 57% (Shenyang) of the total energy consumption, respectively. A vapor recompression cycle system (heat pump), may reduce the total energy consumption (electricity+ steam) by 44% and 46%. Ass uming an initial investment of 18315$ (Longguan) and 27472$ (Shenyang), payback periods of about 3 and 4 years, respectively could be achieved. By applying the Contois kinetic model, the operating conditions of the existing HYBRID biogas plant were opt imi zed in regard to maximum volumetric me thane production rate (2 . 85 CH4 N m3/m3). The following conditions were proposed: HRT: 1.4 days, temperature: 40°C, substrate con centration: 23.4 CODo/l. If all the s lop (135 m3/d) would be treated, in Longgaun about 1,080 Nm3 CH4/d (about 8 Nm3 CH4/m3 slop) could be generated . This corresponds to 288 MJ/m3 slop at a slop : ethano l ratio of 14.71, to 4.23 MJ/l p.a.. The specific e n ergy consumption may replace 88% of the electricity consumpt ion. Actually, 38% of the slop is treated. Thus, the specific energy production from slop is 1.6 MJ/l p . a .. This could cover , at an energy conversion efficiency of 0.23 from methane to electricity. Only 36% of the electricity consumption could be replaced. And the energy bill will be reduced from 0 . 056 $/1 . p . a to 0.047 $/1 . p.a. (Longquan) and from 0.044 $/1.p.a . to 0 . 038 $/1.p.a. (Shenyang), respectively, calcu l ated with a e l ectricity cost 0.033 $/kWh. Distilleries Energy concumption Tentscher, Wolfgang, Chairperson Mora, J. A., Examination Committee Yongping, Zhai, Examination Committee EEC, Scholarship Donor Asian Institute of Technology. Thesis ; no. ET-92-8 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16250 .b10243458 mnait x 240401 2 951012 m a x 0 mnait mnarc 22 40 Barcode : 30050120386817 CREATED : 2012-09-21 RECORD # : i12766380 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120367783 CREATED : 2016-08-06 RECORD # : i13024279 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 37527 37527 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ET-92-8 30050120386817 2026-08-18 09:58:48 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ET-92-8 30050120367783 2026-08-18 09:58:48 2026-08-18 40