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Numerical investigation of heat transfer and erosion characteristics for H-type finned oval tube with longitudinal vortex generators and dimples

Zhao, X.B.; Tang, G.H.; Ma, X.W.; Jin, Y.; Tao, W.Q. - In: Applied Energy 127 (2014) C, pp. 93-104

structures including bleeding dimples, longitudinal vortex generators (LVGs), and compound dimple-LVG. The simulation results … show that the oval tube with compound LVG-dimple achieves the highest overall heat transfer performance while the oval tube … on the first row of tubes together with hemisphere protrusions design, while the compound LVG-dimple on the rest tubes …

Persistent link: https://www.econbiz.de/10010776605

Laminar flow-based fuel cell working under critical conditions: The effect of parasitic current

Xuan, Jin; Leung, Michael K.H.; Leung, Dennis Y.C.; … - In: Applied Energy 90 (2012) 1, pp. 87-93

This paper presents a model integrating computational fluid dynamics (CFD) with electrochemical kinetics for predicting the performance of laminar flow-based fuel cell (LFFC). In the modeling analysis, we study the effect of parasitic current caused by the mixing of fuel and oxidant under...

Persistent link: https://www.econbiz.de/10010572074

A review of solar collectors and thermal energy storage in solar thermal applications

Tian, Y.; Zhao, C.Y. - In: Applied Energy 104 (2013) C, pp. 538-553

Thermal applications are drawing increasing attention in the solar energy research field, due to their high performance in energy storage density and energy conversion efficiency. In these applications, solar collectors and thermal energy storage systems are the two core components. This paper...

Persistent link: https://www.econbiz.de/10010688013

Experimental investigation of dynamic melting in a tube-in-tank PCM system

Tay, N.H.S.; Bruno, F.; Belusko, M. - In: Applied Energy 104 (2013) C, pp. 137-148

Considerable research has been conducted on heat transfer enhancement of phase change materials (PCMs) in thermal energy storage systems. Heat transfer enhancement techniques such as the use of conductors like graphite, carbon fibre and carbon brushes have been proven to be effective. Shell and...

Persistent link: https://www.econbiz.de/10010688017

Numerical simulation study on optimizing charging process of the direct contact mobilized thermal energy storage

Guo, Shaopeng; Li, Hailong; Zhao, Jun; Li, Xun; Yan, Jinyue - In: Applied Energy 112 (2013) C, pp. 1416-1423

Mobilized thermal energy storage (M-TES) system is considered as an attractive alternative to supply heat to distributed heat users, especially when the waste heat from industries is used as a heat source. From our previous study it was known that the charging time of M-TES system was more than...

Persistent link: https://www.econbiz.de/10010702465

Experimental study on condensation heat transfer characteristics of steam on horizontal twisted elliptical tubes

Zhang, Li; Yang, Sheng; Xu, Hong - In: Applied Energy 97 (2012) C, pp. 881-887

An experimental research was conducted to investigate the heat transfer characteristics of steam condensation on horizontal twisted elliptical tubes (TETs) with different structural parameters. Experiments were carried out at the steam saturation temperature of around 100.5°C with the wall...

Persistent link: https://www.econbiz.de/10011040774

Fan air flow analysis and heat transfer enhancement of vehicle underhood cooling system – Towards a new control approach for fuel consumption reduction

Khaled, Mahmoud; Mangi, Fareed; Hage, Hisham El; … - In: Applied Energy 91 (2012) 1, pp. 439-450

We report here experimental results focused on the optimization of vehicle underhood cooling module. These results constitute the basis for a new approach of controlling the cooling module positioning according to the engine energy requirements. Measurements are carried out on a simplified...

Persistent link: https://www.econbiz.de/10010576227

Heat exchanger network retrofit with a fixed network structure

Jiang, Ning; Shelley, Jacob David; Doyle, Steve; Smith, … - In: Applied Energy 127 (2014) C, pp. 25-33

Finding cost effective retrofits for heat exchanger networks remains a challenge. Whilst it is often straightforward to find retrofit changes to an existing network that can improve energy performance, in practice such changes are most often uneconomic. This paper will present an approach to...

Persistent link: https://www.econbiz.de/10010776555