0
research-article

Comparison of Two-Phase Flow Correlations for Thermo-Hydraulic Modeling of Direct Steam Generation in a Solar Parabolic Trough Collector System

[+] Author and Article Information
Nitin Kumar Bohra

Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
jain.ni3@gmail.com

K.S. Reddy

Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
ksreddy@iitm.ac.in

1Corresponding author.

ASME doi:10.1115/1.4038988 History: Received March 14, 2017; Revised September 13, 2017

Abstract

Direct steam generation (DSG) in parabolic trough collector (PTC) is an efficient and feasible option for solar thermal power generation as well as for industrial process heat supply. The two-phase flow inside the absorber tube complicates the thermo-hydraulic modeling of the DSG process. In the present work, a thermo-hydraulic model is developed for the DSG process in the receiver of a solar PTC. The two phase flow in the evaporating section is analyzed using two empirical correlations of heat transfer and pressure drop, and a flow map integrated heat transfer and pressure drop model. The results of the thermo-hydraulic simulation using the different two-phase heat transfer and pressure drop correlations were compared with experimental data from the Direct Solar Steam (DISS) facility at PSA, Spain. The simulation results using the aforementioned two-phase models were found to be satisfactory and consistent within the experimental uncertainty. The flow map based heat transfer model predicted the mean fluid temperature with root mean square error of 0.45% and 1.40%, for the cases considered in the present study. Whereas, the flow map based pressure drop model predicts the variation of pressure along the length of the collector with root mean square error of 0.5% and 0.14%. Moreover, the flow map based model predicts the different flow regimes paving a better understanding of the two-phase flow and identifying the critical sections along the collector length.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In