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http://dx.doi.org/10.5762/KAIS.2021.22.4.56

A Study on Composition and Utilization of Waste Heat Recovery System Assuming Aerobic Liquid-composting Fermentation heat  

Lim, Ryugap (Division of Energy & Environmental, Department of Agricultural Engineering, NlAS)
Jang, Jae Kyung (Division of Energy & Environmental, Department of Agricultural Engineering, NlAS)
Kang, Taegyung (Division of Energy & Environmental, Department of Agricultural Engineering, NlAS)
Son, Jinkwan (Division of Energy & Environmental, Department of Agricultural Engineering, NlAS)
Lee, Donggwan (SK hynix SHE R&D)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.4, 2021 , pp. 56-66 More about this Journal
Abstract
In this study, a waste heat recovery system was devised and the performances of components incorporated to recover the heat generated during the processing of aerobic liquid-composting in a livestock manure treatment facility were analyzed. In addition, the availability of recovered heat was confirmed. The heat generated by liquid fermentation in the livestock manure treatment facility was also checked. Experimental temperatures were set at 35, 40, and 45 ℃ based on considerations of the uniformity of aerobic liquid-composting fermentation tank temperature and its operating range (34.5 ~ 43.9 ℃). Recovered heat energies from the combined heat exchanger, which consisted of PE and STS pipes, were 53.5, 65.6, 74.4 MJ/h, The heat pump of capacity 5 RT was heated at 95.6, 96.1, 98.9 MJ/h and the heating COPs of the pump were 4.53, 4.62, and 4.65, respectively. The maximum hot water production capacity of the heat exchanger assuming a fermentation tank temperature of 45 ℃ confirmed an energy supply of 56 360 kcal/day. The heating capacity of the FCU linked to the heat storage tank was 20.8 MJ/h, and the energy utilization efficiency was 96.1%. When livestock manure was dried using the FCU, it was confirmed that the initial function rate was reduced by 50.5 to 45.8 % after drying.
Keywords
Aerobic fermenter; Heat energy; Heat exchanger; Livestock manure; Waste heat recovery;
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Times Cited By KSCI : 3  (Citation Analysis)
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