Browsing by Author "Cremaschi, Lorenzo"

Now showing items 1-8 of 8

Design and Numerical Simulation of an Evaporator for a Compact Vapor Compression Refrigeration System

Kendall, Benjamin (2019-09-12)

A miniature plate-fin heat exchanger was designed for use in a compact Vapor Compression Refrigeration (VCR) system used for cooling electronic components in an Air Transportable Rack (ATR) chassis. The evaporator was ...

Experimental and Analytical Investigation of Early Frost Growth on Surfaces with Varying Wettability under Typical Heat Pump Operating Conditions

Harges, Ellyn (2021-04-14)

Frost formation on the fins of the outdoor evaporators of heat pump systems during winter months is a naturally occurring phenomenon with adverse effects on heat pump operation. The frost impedes heat transfer by adding ...

Experimental Methods for the Analysis of Frost Nucleation and Frost Growth on Hydrophilic and Hydrophobic Coated Flat Plate Surfaces in Forced Convection Channel Flows

Adanur, Burak (2019-12-09)

An experimental system was designed and built to explore the effect of coated surfaces on frost formation. The experimental system consists of a wind tunnel test apparatus, dew point sensors, thermocouples for temperature ...

Investigation of Al2O3 Nanoparticle Laden Lubricants and Refrigerant Mixtures During Two-Phase Flow Boiling

Bigi, Andrea A. M. (2018-04-27)

In space conditioning and in cooling systems for high power density electronics, vapor compression cycles provide cooling. The working fluid is a refrigerant and oil mixture. A small amount of oil is needed to lubricate ...

Spray Evaporation on Enhanced-Surface Tube Bundles with Low-GWP Refrigerants

Rothe, Joshua (2023-05-04) ETD File Embargoed

With the development of new low-GWP HFO refrigerants and increasingly stringent regulation of existing HVAC&R systems, the heat transfer performance of these refrigerants and the effects of various enhancement techniques ...

Study of onset of frost and crystals growth on hydrophilic and hydrophobic flat surfaces

Ren, Fuqiang (2023-05-02)

Air-source heat pump systems extract heat directly from the cold outdoor ambient and reject heat to the warm indoor environments of residential and commercial buildings. During their winter operation, the outdoor coil often ...

Thermal Modeling of the Laser-Powder Bed Fusion Process

Masoomi, Mohammad (2018-07-24)

Parts fabricated using laser-based additive manufacturing (AM) methods, such as laser-powder bed fusion (L-PBF) receive very high, localized heat fluxes from a laser within a purged, shielding gas (i.e. argon) environment ...

Thermodynamic Model and Initial Experimental Investigation of Air Dehumidification through Electrically Charged Vapor Capturing Electrostatic Droplets

Morcelli, Stefano (2022-04-18) ETD File Embargoed

The removal of water vapor from the air to reduce relative humidity is a well known indoor environmental comfort requirement. Common dehumidification approaches require a substantial amount of energy and usually involve ...