Residual Heat Utilization from Drying Process for Advancing Withering Process in Orthodox Tea Production
- DOI
- 10.2991/978-94-6463-944-5_15How to use a DOI?
- Keywords
- Drying; heat recovery system; withering
- Abstract
In orthodox black tea processing, for instance in PTPN VIII Kebun Malabar, the drying process is typically carried out using hot air that produced by absorbing heat from wood pellet combustion. Unfortunately, when the drying process ends, there is still significant amount of residual heat in the heater area as much as 110℃. On the other hand, the withering process requires warm air (at maximum temperature of 28℃), which is heated by the combustion of wood pellet, also. Optimization using heat recovery system can be utilized by delivering heat from drying system to withering system. Therefore, this study aims to design a heat recovery system as a tool for transferring heat. This system consists of piping installation, fan, and mixing chamber. The results show that the design of connecting pipe has diameter of 558.8 mm, schedule 10, with 60 m length, equipped with thick aluminum foil insulation can deliver 94.84˚C hot air. Then it flowed to a mixing chamber with a capacity of 9.79 m3/s to be mixed with ambient air supplied by a fan, resulting 27,66℃ of warm air. The fan design has capacity of 9.01 m3/s, equipped with 6 blades and 1.74 m diameter impeller. The system impacted great potential of energy saving which reduce wood pellet fuel consumption by 36.2 kg/batch (1,095 kg/year) or withering heat energy of 12.76 kWh/batch (13,970.53 kWh/year).
- Copyright
- © 2025 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Regitami Medina AU - Yanti Suprianti PY - 2025 DA - 2025/12/26 TI - Residual Heat Utilization from Drying Process for Advancing Withering Process in Orthodox Tea Production BT - Proceedings of the International Conference on Sustainable Energy: Toward Energy Transition and Net-Zero Emission (ICOSE 2025) PB - Atlantis Press SP - 204 EP - 216 SN - 3005-155X UR - https://doi.org/10.2991/978-94-6463-944-5_15 DO - 10.2991/978-94-6463-944-5_15 ID - Medina2025 ER -