Study of the main process parameters that influence heat transfer in paper drying
2010
Milosavljević, N., Metso Paper Inc., Turku (Finland). Air Systems | Timofeev, O., VTT Processes, Jyväskylä (Finland) | Rajala, P., Saimaa University of Applied Sciences, Imatra (Finland)
Paper drying depends on different process parameters that influence drying. The most important of the paper drying related parameters in this respect is contact heat transfer coefficient in cylinder drying. In impingement drying, the most important parameter is convective heat transfer coefficient. The objective of this work is study of the contact heat transfer coefficient under dynamic pilot conditions. By applying the same cylinder surface temperatures and fabric pressures we can obtain conditions as in operating full-scale paper machines. A comprehensive study of the impingement heat transfer coefficient at high temperatures is carried out and presented in this paper. The aim of the study is to give a summary of the experimental results of the impingement heat transfer covering a large impingement air temperature range from 100 to 700 deg C.
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