Single-phase heat transfer performance for R515B, R12333zd(E) and water on micro- and nano-structures

Singh, Simran

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https://hdl.handle.net/2142/124608 Copy

Description

Title

Single-phase heat transfer performance for R515B, R12333zd(E) and water on micro- and nano-structures

Author(s)

Singh, Simran

Issue Date

2024-05-02

Director of Research (if dissertation) or Advisor (if thesis)

Miljkovic, Nenad

Department of Study

Mechanical Sci & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Single-phase
• Heat Transfer Coefficient
• Microstructures
• Nanostructures
• Water
• Refrigerants
• R515b
• R12333zd(e)
• Boundary Layers

Language

eng

Abstract

Single-phase heat transfer is crucial in various heating, ventilation, and air conditioning systems, particularly single-phase heat pumps. Understanding the thermohydraulic performance of single-phase flows is essential for calibrating and verifying experimental setups in research labs and industrial systems before delving into two-phase heat transfer studies. Past research warrants deeper analysis of heat transfer enhancements in structurally enhanced tubes. This study examines the heat transfer coefficient enhancement for single-phase flows of R-515B and R1233zd(E) within round circular tubes, comparing the results with Gnielinski’s heat transfer coefficient correlations. Additionally, upgrades to the experimental facility for water flow boiling at the Energy Transport and Research Lab are discussed. The study evaluates micro- and nano-structured surfaces to assess any heat transfer enhancements compared to plain surfaces. Three distinct structures—etched copper micro-nanostructures, boehmite nanostructures, and etched aluminium microstructures—are examined, each with characteristic lengths. This experimental investigation bridges the gap between single-phase heat transfer fundamentals and boundary layer analysis for micro- and nano-surfaces.

Graduation Semester

2024-05

Type of Resource

Text

Handle URL

https://hdl.handle.net/2142/124608

Copyright and License Information

Copyright 2024 Simran Singh

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