Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Experimental analysis of heat storage and release of oscillating heat pipe phase-change energy storage
deviceShibo Cao1, Xiaoxue Luo1*, Xiaohui Lu1, Xiaochun Han1
1 School of Maritime,

Beibu Gulf University, Qinzhou, China

ABSTRACT

For the sake of store the ship's waste heat efficiently, a new type ofoscillating heat-pipe phase-change energy storage device was designed,
which couples the oscillating heat-pipe with the phase change material(PCM). The device can use the ship's waste heat as the heat source, theoscillating heat-pipe as the heat transfer element and the PCM as the heatstorage material to store the ship's waste heat efficiently. Phase changematerial is a kind of material that can use latent heat for heat storage. The
latent heat storage of phase change materials accounts for more than 80%of the total heat storage. PCM is cheap and easy to use. At present, it has
been applied in many fields such as ship waste heat recovery, industrial
waste heat recovery and power peak shaving (Deng Z et al,2017;
Maydanik Y et al,2009). Luo XX et al. (2018) pointed out that oscillating
heat-pipe is a new type of heat transfer element with high heat flux
density and high efficiency, which can be applied in small space.
Compared with the traditional heat-pipe, oscillating heat-pipe eliminates
the complex parts such as pipe core and gas chamber, reduces the failure
rate of the device and improves the heat transfer efficiency. Theoscillating heat-pipe has the advantages of small volume, diversified
structure, strong adaptability and strong heat transfer (K handekar S,2003).

In order to make more efficient use of ship low-temperature waste heat,
the self-developed waste heat recovery device is tested in this paper. For
the sake of improve the heat storage and release efficiency of the device,this paper compares the heat storage and release experiment of binary
charged working medium with that of single charged working medium.
The experimental results show that the heat storage time of binary
charged working medium is about 900s shorter than that of single
charged working medium, and the heat storage and release performanceof binary charged working medium is better than that of single charged
working medium.

KEY WORDS: Oscillating heat-pipe phase-change energy storage

device; Barium hydroxide octahydrate; Heat storage efficiency; Binary
charge working medium

INTRODUCTION
With the increasing demand for energy and the increasing consumptionof energy, most countries have attached great importance to the energy
problem. The massive consumption of fossil energy has caused global
warming, and the change of environmental temperature even affects thesurvival of animals and plants. Ships undertake more than 85% of theworld's cargo transportation, and ships play a major role in international
trade. Ship transportation consumes 3% of the world's energy. As themain power output device of ships, diesel engines consume a lot of fuelwhen doing work. However, the utilization rate of ship diesel engine
energy is only 48 ~ 51%, and most of the rest energy is discharged into
the environment through smoke exhaust and cylinder liner water,resulting in a large amount of heat loss (Dzida M et al, 2009). How tocollect and store the waste heat of ships is a problem to be solved atpresent.

Oscillating heat-pipe is a new and efficient heat transfer element
proposed by Japanese scholars Akachi in the early 1990s (Kalogirou SA,2001). In order to explore the best heat transfer performance ofoscillating heat-pipe and enhance the heat transfer performance ofoscillating heat-pipe, many scholars have studied it from the perspectiveof single filling working medium (Cui XY et al,2009). Handekar S et al.
(2003) Summarized the working medium conditions applicable tooscillating heat-pipe: (1) Select the working medium with high dP / dT,
because it can produce large driving force for thermal transmission undersmall temperature difference. (2) The working medium with low
dynamic viscosity is selected, because its shear stress is small, the energy3633