naa a22 4500 510819699 CHVBK 20180411083525.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11814-013-0055-2 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0055-2 The effect of noncondensable gas on heat transfer in the preheater of the sewage sludge drying system [Elektronische Daten] [Young Park, Joeng-Geun Kim, Gyoung Jin, Sang-Ho Lee, Jong-Ho Moon, Seung-Yong Lee, Sang-Il Choi] We used a shell-and-tube type preheater to investigate the effect of noncondensable gas on heat transfer. In the preheater of the drying system, heat is exchanged between steam-air mixed gas which is dryer outlet gas and sewage sludge. To evaluate the performances of the preheater, water was first used in the tube-side material instead of sewage sludge and steam-air mixed gas in the shell-side material. The test variables were as follows: mixed gas inlet temperatures range from 95 to 120 °C; inlet air content, m air /m steam from 55 to 83%; tube-side water flow rate from 42 to 62 kg/h. The shell-side heat transfer coefficient varied from 150 to 550W/m2K, which corresponds to the amount of noncondensable gas in the steam-air mixed gas and the overall heat transfer coefficient varied from 60 to 210W/m2K. Using sewage sludge as a tube-side material the overall heat transfer coefficient varied from 60 to 130W/m2K and the outlet temperature of sewage sludge was above 90 °C, which is high enough for reducing energy consumption in the dryer by preheating the sewage sludge. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Drying System nationallicence Preheater nationallicence Heat Transfer nationallicence Condensation nationallicence Noncondensable nationallicence Park Young Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Kim Joeng-Geun Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Jin Gyoung Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Lee Sang-Ho Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Moon Jong-Ho Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Lee Seung-Yong Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Choi Sang-Il Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/7(2013-07-01), 1375-1379 0256-1115 30:7<1375 2013 30 11814 https://doi.org/10.1007/s11814-013-0055-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0055-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Park Young Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Kim Joeng-Geun Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Jin Gyoung Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Lee Sang-Ho Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Moon Jong-Ho Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Lee Seung-Yong Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 700 1- Choi Sang-Il Korea Institute of Energy Reserch, 152, Gajeong-ro, Yuseong-gu, 305-343, Daejeon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/7(2013-07-01), 1375-1379 0256-1115 30:7<1375 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer