Study of waste heat recovery using phase change particles

Stefan Thynell, V. Patnaik

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

A one-dimensional model has been developed for a waste heat recovery unit that uses phase-change particles on a direct-contact heat exchange with a counter-current stream of air at high temperature. The model is based on using the conservation equations of mass, momentum and energy, which have been reduced to suitable form for numerical solution. Appropriate correlations for the drag and heat transfer coefficients have been selected from the literature for an accurate simulation of the physical situation. A standard 4th-order Runge-Kutta scheme has been applied to numerically integrate these equations to obtain the required particle and gas velocity and temperature field distributions. The numerical results obtained indicate that the use of phase-change particles has a marked advantage over regular (non phase-change) particles regarding heat exchanger effectiveness.

Original languageEnglish (US)
Pages (from-to)71-79
Number of pages9
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume129
StatePublished - Jan 1 1990
EventNumerical Heat Transfer - Presented at AIAA/ASME Thermophysics and Heat Transfer Conference - Seattle, WA, USA
Duration: Jun 18 1990Jun 20 1990

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Waste heat utilization
Heat transfer coefficients
Heat exchangers
Drag
Conservation
Momentum
Temperature distribution
Gases
Air
Temperature
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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Study of waste heat recovery using phase change particles. / Thynell, Stefan; Patnaik, V.

In: American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, Vol. 129, 01.01.1990, p. 71-79.

Research output: Contribution to journalConference article

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T1 - Study of waste heat recovery using phase change particles

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N2 - A one-dimensional model has been developed for a waste heat recovery unit that uses phase-change particles on a direct-contact heat exchange with a counter-current stream of air at high temperature. The model is based on using the conservation equations of mass, momentum and energy, which have been reduced to suitable form for numerical solution. Appropriate correlations for the drag and heat transfer coefficients have been selected from the literature for an accurate simulation of the physical situation. A standard 4th-order Runge-Kutta scheme has been applied to numerically integrate these equations to obtain the required particle and gas velocity and temperature field distributions. The numerical results obtained indicate that the use of phase-change particles has a marked advantage over regular (non phase-change) particles regarding heat exchanger effectiveness.

AB - A one-dimensional model has been developed for a waste heat recovery unit that uses phase-change particles on a direct-contact heat exchange with a counter-current stream of air at high temperature. The model is based on using the conservation equations of mass, momentum and energy, which have been reduced to suitable form for numerical solution. Appropriate correlations for the drag and heat transfer coefficients have been selected from the literature for an accurate simulation of the physical situation. A standard 4th-order Runge-Kutta scheme has been applied to numerically integrate these equations to obtain the required particle and gas velocity and temperature field distributions. The numerical results obtained indicate that the use of phase-change particles has a marked advantage over regular (non phase-change) particles regarding heat exchanger effectiveness.

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