Condensation/Evaporation Heat Transfer and Pressure Drop of High-Performance Aluminium Heat Exchanger Using Low-GWP Refrigerants

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420861
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: INOUE NORIHIRO 東京海洋大学, その他部局等, 教授 (80251677)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 熱交換器 / 凝縮 / 蒸発 / 熱伝達, / 圧力損失 / 低GWP / 冷媒

Outline of Final Research Achievements

In this research, a refrigerant with a low warming potential, small-diameter heat transfer tubes with an inner diameter ranging between 3-4 mm, and a conventional tube having a diameter of approximately 8 mm are being used. Till date, sufficient heat transfer experiments have not been conducted using the low GWP refrigerant, even in the refrigeration and air conditioning industry. Experiments on single-phase/condensation/evaporation heat transfer and pressure drop have been conducted in order to contribute toward the development of a high-performance heat exchanger, entirely made of aluminum, which can lower the cost and be used for recovering self-evaporative latent heat of cargo on LNG carriers and for low-temperature waste heat recovery in ship engines. We have provided detailed information that supports the thermal design and the improvement in performance of the aluminum heat exchanger, which can be applied to refrigeration and air conditioning equipment and ship engine systems.

Free Research Field

船舶海洋工学・冷凍空調工学