Experimental investigation of oscillating heat pipes

Author

Lin, Lanchao ; Ponnappan, Rengasamy ; Leland, John

Author_Institution

UES Inc., Dayton, OH, USA

Volume

2

fYear

2000

fDate

2000

Firstpage

827

Abstract

Operation requirements of oscillating heat pipes (OHPs) are proposed. Based on the requirements, OHPs with nonflammable fluorocarbon fluids, FC-72 and FC-75, as the working fluid are developed. The OHPs have an inner diameter of 1.75 mm, a total length of 446 mm and 40 tubing turns. There is one evaporator in the middle and two condensers on both outer sides of the OHPs. Thermal performance tests are conducted at various operating temperatures and heat rates. The working fluid fill ratio is varied. A high performance OHP with FC-72 has been indicated for the first time. The FC-72 OHP can transport 2040 W heat rate without dryout. The gravitational acceleration does not have noticeable influence on the performance of the fluorocarbon OHP. The thermal performances of the fluorocarbon OHPs are compared with the case of an acetone OHP

Keywords

heat pipes; oscillations; 1.75 mm; 2040 W; 446 mm; FC-72 working fluid; FC-75 working fluid; acetone; condensers; evaporator; gravitational acceleration; nonflammable fluorocarbon fluids; oscillating heat pipes; thermal performance tests; thermal performances; working fluid fill ratio; Acceleration; Actuators; Bonding; Cooling; Heat transfer; Laboratories; Temperature; Testing; Thermal conductivity; US Government;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Engineering Conference and Exhibit, 2000. (IECEC) 35th Intersociety

Conference_Location

Las Vegas, NV

Print_ISBN

1-56347-375-5

Type

conf

DOI

10.1109/IECEC.2000.870880

Filename

870880