Efficient waste heat recovery system for high-temperature solid particles based on heat transfer enhancement. (5th June 2019)

• Record Type: Journal Article
• Authors: Jiang, Binfan; Xia, Dehong; Guo, Hao; Xiao, Linshu; Qu, Hengyu; Liu, Xiangjun
• Is Part Of: Applied thermal engineering. Volume 155(2019)
• Page Start: 166
• Page End: 174
• Publication Date: 2019-06-05
• Subjects: Waste heat recovery -- Solid particles -- Double-medium system -- Heat transfer enhancement -- Pareto optimization; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2019.03.101
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Efficient heat recovery methods for high temperature particle is proposed. Heat recovery efficiency of vertical heat recovery systems in this paper are ∼80%. The honeycomb apparatus extends specific area of heat transfer to 100–2000 m 2 /m 3 . A double-medium heat recovery system with optimized structure is established. Abstract: A series of efficient heat recovery methods including PCHEE-A, PCHEE-K and a double-medium system is proposed in this paper, which is to provide comprehensive solutions for high temperature particle in different situations. The PCHEE-A and PCHEE-K can increase the heat transfer area and heat transfer coefficient, through extending specific area to 1000–2000 m 2 /m 3 and inducing turbulence in the heat transfer boundary, respectively. For the double-medium system which can achieve deep heat recovery and utilization, a multi-dimensional thermal resistance model is established to conduct heat analysis. Based on the model, Pareto frontier optimization of the double-medium system is carried out, and the optimal medium arrangement as well as the heat load distribution is derived. By combing the above methods, three typical systems (single-medium vertical plate-type with PCHEE-A, double-medium vertical tube-type and horizontal-type with PCHEE-K) are established and can get heat recovery efficiency at around 80%.