English

 Curriculum Vitae

Akira HOSHI

Professor
Department of Mechanical Engineering and Intelligent Systems,
Faculty of Engineering,
Tohoku Gakuin University

3-1 Shimizukoji, Wakabayashi-ku, Sendai, Miyagi 984-8588, JAPAN
E-mail : ahoshi@mail.tohoku-gakuin.ac.jp

ACADEMIC EDUCATION
B. Eng. -Dept. of Mechanical Engineering II, Iwate University (1983-1985)
M. Eng. -Graduate School of Mechanical Engineering, Iwate University (1985-1987)
D. Eng -Tohoku University (2002)

PROFESSION
Energy and Environment / Heat Transfer / Solar Energy Utilization
Specialization:
Latent Heat Thermal Energy Storage, Stirling Engine, Natural Energy Utilization, etc.


ACADEMIC APPOINTMENTS & POSITIONS
Professor, Dept. of Mechanical Engineering and intelligent Systems, Tohoku gakuin University
(2013-).
Professor, Dept. of Mechanical Engineering, Ichinoseki National College of Technology (2007-2012).
Associate Professor, Dept. of Mechanical Engineering, Ichinoseki National College of Technology (2002-2006).
Visiting Scholar, School of Physics, University of Sydney(2003-2004).
Research Associate, Dept. of Aeronautics and Space Engineering, Tohoku University (1996-2002).
Research Associate, Dept. of Mechanical Engineering, Ichinoseki National College of Technology (1990-1996).

 Publications

PUBLISHED PAPERS
1. Takeo S. SAITOH and Akira HOSHI, “Analytical Solutions for Close-Contact Melting in Cylindrical and Spherical Capsules with Arbitrary Wall Temperature Profile”, Trans. of the JSRAE, Vol.14, No.3(1997), pp.285-292.
2. Akira HOSHI and Takeo S. SAITOH, “A Study of Solar Steam Accumulator with High Temperature Latent Heat Thermal Energy Storage (1st Report ; High Melting Point Phase Change Material)”, Journal of JSES, Vol.27, No.5(2001), pp.34-40.
3. Akira HOSHI and Takeo S. SAITOH, “A Study of Solar Steam Accumulator with High Temperature Latent Heat Thermal Energy Storage (2nd Report ; Fundamental Characteristics of Steam Accumulator)”, Journal of JSES, Vol.27, No.5(2001), pp.41-48.
4. Akira HOSHI and Takeo S. SAITOH, “A Highly-Efficient Heat Pump System with Solar Thermal and Sky Radiation Cooling”, Journal of JSES, Vol.28, No.1(2002), pp.51-57.
5. Akira HOSHI and Takeo S. SAITOH, “A Research on Performance of Solar Rankine Cycle System”, Journal of JSES, Vol.28, No.6(2002), pp.46-53.
6. Akira HOSHI and Takeo S. SAITOH, “Study of Phase Change Steam Accumulator and Application to Solar Rankine Cycle System”, Journal of JSME, Vol.69, No.679(2003), pp.697-704.
7. Akira HOSHI, David R. Mills, Antoine Bittar and Takeo S. SAITOH, “Screening of high melting point phase change materials (PCM) in solar thermal concentrating technology based on CLFR”, Solar Energy, Vol.79, (2005), pp.332-339.
8. Shinya Obara, Shunsuke Kito, Akira Hoshi and Seizi Sasaki, Dynamic Characteristics of PEM-FC / Woody Biomass Engine Hybrid Micro Grid, Journal of Thermal Science and Technology, JSME, (2007), pp.111-122.
9. Shinya Obara, Shunsuke Kito, Akira Hoshi and Seizi Sasaki, Energy Balance of Stirling Engine Cogeneration and Installation Potentiality in Cold Region House, Journal of Environment and Engineering, Vol.2 (2007), No.4, pp.696-707.
10. Akira HOSHI, Takafumi ONO, Daiki ABE, Takuya AKAZAWA, Isao FUJIMOTO and Yasuhira KIKUOKA,"Research on Heat Electricity Combined Utilization of Woody Biomass Energies", Journal of JSES, Vol.35, No.1(2009), pp.51-56.
11. Noboru Yamada, Akira Hoshi and Yasuyuki Ikegami, "Performance simulation of solar-boosted ocean thermal energy conversion plant", Renewable Energy, 34 (2009), pp.1752-1758.
12. Akira HOSHI, Shinichiro WAKASHIMA, Kazuo MAEZAWA, Isao FUJIMOTO, Yasuhira KIKUOKA and Nobutoshi TEZUKA, "Heat and Electricity Combined Utilization System by the Practical Stirling Engine using Woody Biomass Energies", Journal of Environment and Engineering, JSME, Vol.5 (2010), No.1, pp.122-133.
13. Ryo SATO, Shin-ichiro WAKASHIMA and Akira HOSHI, "Numerical simulation of heat exchange in the geothermal heat pump system", Journal of JSES, Vol.36, No.3(2010), pp.73-79.
14. Akira HOSHI, Takuya AKAZAWA, Shin-ichiro WAKASHIUMA, Isao FUJIMOTO and Yasuhira KIKUOKA, "Study on Waste Heat Recovery from Exhaust Smoke in Co-Generation System Using Woody Biomass Fuels", Journal of JSME, Vol.77, No.774(2011), pp.334-343.
15. Noboru Yamada, Masataka Watanabe and Akira Hoshi, "Experiment on pumpless Rankine-type cycle with scroll expander", Energy, Vol.49 (2013), Issue 1, pp.137-145.
16. Akira HOSHI, "Transition of my challenge about a Practical Stirling Cycle Engine", BHUTAN JOURNAL of RESEARCH & DEVELOPMENT Special Edition, Vol.4, No.1 (2015), pp.99-106.

REFEREED CONFERENCE PAPERS
1. T.S.Saitoh, and A.Hoshi, “Experimental Investigation on Combined Close-Contact and Natural Convection Melting in Horizontal Cylindrical and Spherical Capsule”, Proceedings of the 31st Intersociety Energy Conversion Engineering Conference, Vol.3 (1996), pp.2090-2094.
2. T.S.Saitoh and A.Hoshi, “Analysis of Close-Contact Melting with Inner Wall Temperature Variation in a Horizontal Cylindrical Capsule”, Proceedings of the 32nd Intersociety Energy Conversion Engineering Conference, Vol.3 (1997), pp.1641-1645.
3. T.S.Saitoh and A.Hoshi, “Analytical Solution for Combined Close-Contact and Natural Convection Melting in Horizontal Cylindrical Heat Storage Capsule”, Proceedings of the 33rd Intersociety Energy Conversion Engineering Conference, Paper No.366 (1998), CD-ROM.
4. T.S.Saitoh and A.Hoshi, “Development of Approximate Method to Analyze the Characteristics of Latent Heat Thermal Energy Storage System”, Proceedings of the 5th ASME/JSME Thermal Engineering Joint Conference, Paper No.6346 (1999), CD-ROM.
5. T.S.Saitoh and A.Hoshi, “High Temperature Latent Heat Thermal Energy Storage System for Solar Rankine Engines”, Proceedings of Symposium on Energy Engineering in the 21st Century (SEE2000), Vol.2 (2000), pp.796-803.
6. T.S.Saitoh, A.Hoshi and J.Takahashi, “A Highly-Efficient Heat Pump System with Solar Thermal and Sky Radiation Cooling”, Proceedings of the 36th Intersociety Energy Conversion Engineering Conference, Vol.1 (2001), pp.489-494.
7. T.S.Saitoh and A.Hoshi, “Highly-Efficient Heat Pump System using Sky Radiation Cooling”, Proceedings of the ISES 2001 Solar World Congress (2001), CD-ROM.
8. A.Hoshi and T.S.Saitoh, “An Advanced Solar Thermal Electric System with Phase Change Steam Accumulator and CPC Collector”, Proceedings of the World Renewable Energy Congress (2002), CD-ROM.
9. T.S.Saitoh and A.Hoshi, “Proposed Solar Rankine Cycle System with Phase Change Steam Accumulator and CPC Solar Collector”, Proceedings of the 37th Intersociety Energy Conversion Engineering Conference (2002), CD-ROM.
10. N.Yamada, A.Hoshi and Y.Ikegami, Thermal Efficiency Enhancement of Ocean Thermal Energy Conversion (OTEC) System Using Solar Thermal Energy, Proceedings of the Intersociety Energy Conversion Engineering Conference, Paper No.2006-4130 (2006).
11. Nobutoshi Tezuka, Akira Hoshi and Seizi Sasaki, A System for the Effective Utilization of Woody Biomass Fuels by the Practical Stirling Engine, Proc. of The 13th International Stirling Engine Conference (2007), pp.235-240.
12. Akira HOSHI and Shin-ichiro WAKASHIMA, The Education of Environmental Engineering by Practical Stirling Engine using Woody Biomass, Proceedings of the 5th International Conference on Business and Technology Transfer (ICBTT2010) (2010), pp.11-16.
13. Akira HOSHI, Akira SASAKI, Shinzo TANAKA and Shin-ichiro WAKASHIMA,Support of Reconstruction for Disaster Area using Stirling Cycle Machine, Proceedings of the 6th International Conference on Business and Technology Transfer (ICBTT2012) (2012), pp.64-69.
14. Akira HOSHI, Energy and environment education based on the new ☆ energy contest, Proceedings of the 7th International Conference on Business and Technology Transfer (ICBTT2014) (2014), pp.72-77.
15.Shin-ichiro Wakashima, Akira HOSHI, Sho Chiba and Daiki Sugawara, DEVELOPMENT OF THE COMPACT WASTE HEAT RECOVERY SYSTEM USING BOTH ORC AND LHTS, Proceedings of the 4th International Forum on Heat Transfer (IFHT2016) (2016), USB memory No.2022.
16. Kazuki ODA and Akira HOSHI, Effective Use of the Waste Heat from a Rocket Stove, Proceedings of the 2018 International Conference on Business and Technology Transfer / Technology and Society (ICBTT/TS 2018) (2018) CD-ROM.
17. Tatsuhiro SASAKI and Akira HOSHI, Design and Manufacture of Stirling Engine Car for Teaching Material, Proceedings of the 2018 International Conference on Business and Technology Transfer / Technology and Society (ICBTT/TS 2018) (2018) CD-ROM.

THESIS
A Study on Solar Rankine Cycle System with Steam Accumulator of High Temperature Latent Heat Thermal Energy Storage Type
Tohoku University, 2002.
In this thesis, an advanced solar Rankine cycle system with CPC (Compound Parabolic Concentrator) collector and steam accumulator of high-temperature latent heat thermal energy storage type was newly proposed.

 Researches

 Global warming due to carbon dioxide (CO2) emissions is an important environmental issue. The rapid implementation of advanced energy technologies for utilizing energy more efficiently and the use of clean and safe renewable energy (e.g. solar energy, wind energy, sky radiation cooling, etc.) will be required to reduce climate impacts. Since fossil fuels such as petroleum, coal, and natural gas are limited resources, renewable energy such as solar, wind, and biomass will be needed as substitute fuels.

Effective Use of the Waste Heat from a Rocket Stoves
 As a countermeasure of a possible future disaster, we designed and manufactured a rocket stove that can heat and cook without using fossil fuels in this research. The rocket stove can burn efficiently the waste wood that is difficult to consume and can be manufactured at low cost. Furthermore, to utilize effectively the waste heat that is discarded in the environment, we tried to generate the electric power using a thermoelectric conversion module.

Design and Manufacture of Stirling Engine Model Car for Teaching Material
 We introduce a model of α-type Stirling engine car. This model is designed and manufactured for the aim of enlightening of the Stirling engine and the application of a teaching material. In addition, we worked to program a performance simulation based on Ideal Schmidt Theory.This program makes it possible to easily calculate the theoretical outputs of the Stirling engine by inputting parameters.

Design of Latent Heat Thermal Energy Storage Unit for Unused Low-Temperature Waste Heat Recovery
 We manufactured the latent heat thermal energy storage system which can recover the 80~150℃ waste heat from the production activity, store 9000kJ and have thermal capability of 1kW×3hr. This system combines the existing shell-and-tube type heat exchangers and the latent heat thermal energy storage technology, and has an advantage in cost performance. And this system can store the equal energy with a half volumetric capacity of the conventional hot water tank.