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Title: Economic analysis of drying microalgae Chlorella in a conveyor belt dryer with recycled heat from a power plant

Here, the objective of this research is to estimate the cost of drying microalgae chlorella in a conveyor belt dryer using waste heat from an industrial source. The recycling system consists of a run around thermal fluid between two tube heat exchangers. The dryer is mathematically modeled and the mass transport coefficient is obtained from empirical thin-layer kinetic data.The dryer and heat recovery system are designed for the production of 1000 kg/h dried microalgae at a moisture content of 10% (wet basis, w.b.). The input moisture content can range from 35 to 75% (wet basis). Depending upon the applied Hand factor, the total cost to dry microalgae from 55% to 10% ranges from 46.13 to 109.64 per ton of dried product. Using natural gas assumed at 6.27/GJ, the drying cost increases to 83.47 per ton (using hand factor equal to 1). The drying cost using a commercial spray dryer is 109.05 per ton of dried product (using hand factor equal to 1). The paper discusses the sensitivity of drying costs to initial moisture content as well. The results show that integrating waste heat recovery with conveyor belt dryer decreases the drying costs of chlorella drying in comparison to two othermore » drying methods.« less
Authors:
 [1] ;  [1] ; ORCiD logo [2] ; ORCiD logo [3]
  1. Univ. of British Columbia, Vancouver, BC (Canada)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of British Columbia, Vancouver, BC (Canada); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Applied Thermal Engineering
Additional Journal Information:
Journal Volume: 124; Journal Issue: C; Journal ID: ISSN 1359-4311
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Microalgae; Waste heat; Economic analysis; Conveyor belt dryer; Heat recovery; Co-location drying
OSTI Identifier:
1468256

Hosseinizand, Hasti, Lim, C. Jim, Webb, Erin, and Sokhansanj, Shahab. Economic analysis of drying microalgae Chlorella in a conveyor belt dryer with recycled heat from a power plant. United States: N. p., Web. doi:10.1016/j.applthermaleng.2017.06.047.
Hosseinizand, Hasti, Lim, C. Jim, Webb, Erin, & Sokhansanj, Shahab. Economic analysis of drying microalgae Chlorella in a conveyor belt dryer with recycled heat from a power plant. United States. doi:10.1016/j.applthermaleng.2017.06.047.
Hosseinizand, Hasti, Lim, C. Jim, Webb, Erin, and Sokhansanj, Shahab. 2017. "Economic analysis of drying microalgae Chlorella in a conveyor belt dryer with recycled heat from a power plant". United States. doi:10.1016/j.applthermaleng.2017.06.047. https://www.osti.gov/servlets/purl/1468256.
@article{osti_1468256,
title = {Economic analysis of drying microalgae Chlorella in a conveyor belt dryer with recycled heat from a power plant},
author = {Hosseinizand, Hasti and Lim, C. Jim and Webb, Erin and Sokhansanj, Shahab},
abstractNote = {Here, the objective of this research is to estimate the cost of drying microalgae chlorella in a conveyor belt dryer using waste heat from an industrial source. The recycling system consists of a run around thermal fluid between two tube heat exchangers. The dryer is mathematically modeled and the mass transport coefficient is obtained from empirical thin-layer kinetic data.The dryer and heat recovery system are designed for the production of 1000 kg/h dried microalgae at a moisture content of 10% (wet basis, w.b.). The input moisture content can range from 35 to 75% (wet basis). Depending upon the applied Hand factor, the total cost to dry microalgae from 55% to 10% ranges from 46.13 to 109.64 per ton of dried product. Using natural gas assumed at 6.27/GJ, the drying cost increases to 83.47 per ton (using hand factor equal to 1). The drying cost using a commercial spray dryer is 109.05 per ton of dried product (using hand factor equal to 1). The paper discusses the sensitivity of drying costs to initial moisture content as well. The results show that integrating waste heat recovery with conveyor belt dryer decreases the drying costs of chlorella drying in comparison to two other drying methods.},
doi = {10.1016/j.applthermaleng.2017.06.047},
journal = {Applied Thermal Engineering},
number = C,
volume = 124,
place = {United States},
year = {2017},
month = {6}
}