Performance of a rigid porous-tube stratification manifold in comparison to an inlet pipe

Shuping Wang, Jane H. Davidson

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Achieving thermal stratification of storage tanks has well documented advantages for increasing the efficiency and quality of delivered energy of solar heating systems. The present work presents experimental characterization of a porous tube manifold during charging of a water tank at 0.07 kg s−1. Measurements of vertical temperature distributions are used to evaluate the dimensionless exergy efficiency of the manifold in comparison to a top-mounted inlet pipe and an inlet pipe with a diffuser. Particle image velocimetry measurements illustrate the fluid dynamic behavior of the three inlet configurations. Results demonstrate that the manifold is superior to the other inlet configurations studied. It releases the incoming flow at the level of neutral buoyancy, and prevents suction of tank fluid into the manifold at other vertical levels.

Original languageEnglish (US)
Pages (from-to)298-308
Number of pages11
JournalSolar Energy
Volume146
DOIs
StatePublished - Jan 1 2017

Keywords

  • Manifold
  • Porous
  • Storage
  • Thermal stratification
  • Water heating

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