In this work, twisted tape inserts were applied to a tube-in-shell heat exchanger for syngas cooling. A comparison between plain tube, standard full twisted tape and perforated twisted tape was carried out by measuring the thermal-hydraulic performance and the heat dissipated. Results shown a considerable increase of heat transfer using twisted tapes for syngas cooling and perforated twisted tapes performed better than full twisted tapes, reaching a thermal-hydraulic efficiency of 1.24 and increasing the Nu number up to 47% respect of the plain tube. Perforated twisted tapes confirmed the literature results even applied to syngas cooling and are of great interest as heat transfer enhancers to reduce the heat exchanger dimensions, key parameter for micro-scale gasification power plants.
Enhanced heat transfer in tubes-in-shell heat exchanger for syngas cooling: A comparison between conventional and perforated twisted tape inserts / Morselli, N.; Ottani, F.; Parenti, M.; Tartarini, P.. - (2020), pp. 288-294. (Intervento presentato al convegno 28th European Biomass Conference and Exhibition, e-EUBCE 2020 tenutosi a Virtual - ONLINE nel 2020).
Enhanced heat transfer in tubes-in-shell heat exchanger for syngas cooling: A comparison between conventional and perforated twisted tape inserts
Morselli N.;Ottani F.;Parenti M.;Tartarini P.
2020
Abstract
In this work, twisted tape inserts were applied to a tube-in-shell heat exchanger for syngas cooling. A comparison between plain tube, standard full twisted tape and perforated twisted tape was carried out by measuring the thermal-hydraulic performance and the heat dissipated. Results shown a considerable increase of heat transfer using twisted tapes for syngas cooling and perforated twisted tapes performed better than full twisted tapes, reaching a thermal-hydraulic efficiency of 1.24 and increasing the Nu number up to 47% respect of the plain tube. Perforated twisted tapes confirmed the literature results even applied to syngas cooling and are of great interest as heat transfer enhancers to reduce the heat exchanger dimensions, key parameter for micro-scale gasification power plants.
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