405 Performance Analysis of a Multi-Functional CO_2 Heat Pump Water Heating System by Numerical Simulation : Influence of Reheating Water Return and Tepid Water Extraction

The Proceedings of the Symposium on Environmental Engineering ◽

10.1299/jsmeenv.2014.24.129 ◽

2014 ◽

Vol 2014.24 (0) ◽

pp. 129-132

Author(s):

Ryohei YOKOYAMA ◽

Takuya NAKAMATA ◽

Tetsuya WAKUI ◽

Masashi OHKURA

Keyword(s):

Numerical Simulation ◽

Performance Analysis ◽

Heat Pump ◽

Heating System ◽

Water Extraction ◽

Water Heating ◽

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M516 Performance Analysis of a Multi-Functional CO_2 Heat Pump Water Heating System by Numerical Simulation : Analysis Under a Daily Change in Hot water Demand

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2015.90.342 ◽

2015 ◽

Vol 2015.90 (0) ◽

pp. 342

Author(s):

Takuya NAKAMATA ◽

Ryohei YOKOYAMA ◽

Masashi OHKURA ◽

Tetsuya WAKUI

Keyword(s):

Numerical Simulation ◽

Performance Analysis ◽

Heat Pump ◽

Water Demand ◽

Simulation Analysis ◽

Heating System ◽

Hot Water ◽

Water Heating ◽

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506 Performance Analysis of a CO_2 Heat Pump Water Heating System by Numerical Simulation : Study on Influence of Ambient and Operation Conditions

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2007.82._5-8_ ◽

2007 ◽

Vol 2007.82 (0) ◽

pp. _5-8_

Author(s):

Shinsuke OKAGAKI ◽

Ryohei YOKOYAMA ◽

Tetsuya WAKUI ◽

Kazuhisa TAKEMURA

Keyword(s):

Numerical Simulation ◽

Performance Analysis ◽

Heat Pump ◽

Simulation Study ◽

Heating System ◽

Water Heating ◽

Operation Conditions

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Performance Analysis and Optimization of a CO 2 Heat Pump Water Heating System

Transcritical CO2 Heat Pump ◽

10.1002/9781118380055.ch9 ◽

2021 ◽

pp. 249-282

Author(s):

Ryohei Yokoyama

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Heating System ◽

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Performance analysis of a CO2 heat pump water heating system under a daily change in a standardized demand

Energy ◽

10.1016/j.energy.2009.11.008 ◽

2010 ◽

Vol 35 (2) ◽

pp. 718-728 ◽

Author(s):

Ryohei Yokoyama ◽

Tetsuya Wakui ◽

Junya Kamakari ◽

Kazuhisa Takemura

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Heating System ◽

Water Heating ◽

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517 Performance Enhancement of a CO_2 Heat Pump Water Heating System by Extracting Water With Middle Temperatures : Performance Analysis Under a Daily Change in a Simulated Hot Water Demand

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2009.84._5-23_ ◽

2009 ◽

Vol 2009.84 (0) ◽

pp. _5-23_

Author(s):

Junya KAMAKARI ◽

Ryohei YOKOYAMA ◽

Tetsuya WAKUI ◽

Kazuhisa TAKEMURA

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Water Demand ◽

Performance Enhancement ◽

Heating System ◽

Hot Water ◽

Water Heating ◽

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413 Performance Analysis of a Water Heating System with a Storage Tank Using Phase Change Material : Fundamental Performance Analysis by Numerical Simulation

The Proceedings of the Symposium on Environmental Engineering ◽

10.1299/jsmeenv.2012.22.281 ◽

2012 ◽

Vol 2012.22 (0) ◽

pp. 281-284

Author(s):

Ryouhei Yokoyama ◽

Yu Taeuchi ◽

Masashi Okura ◽

Tetsuya Wakui

Keyword(s):

Numerical Simulation ◽

Performance Analysis ◽

Phase Change ◽

Phase Change Material ◽

Storage Tank ◽

Heating System ◽

Water Heating ◽

Change Material

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Performance Analysis of a CO2 Heat Pump Water Heating System in Consideration of Operating Conditions

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2018.93.811 ◽

2018 ◽

Vol 2018.93 (0) ◽

pp. 811

Author(s):

Mizusa ISHIHARA ◽

Ryohei YOKOYAMA ◽

Tetsuya WAKUI

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Heating System ◽

Operating Conditions ◽

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Development and Performance Analysis on a Photovoltaic-Thermal Integrated Heat Pump Water Heating System

Proceedings of ISES World Congress 2007 (Vol. I – Vol. V) ◽

10.1007/978-3-540-75997-3_411 ◽

2008 ◽

pp. 2023-2026 ◽

Author(s):

Xu Guoying ◽

Xu Xinjian ◽

Zhang Xiaosong ◽

Yang Lei

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Heating System ◽

Water Heating ◽

And Performance

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428 Performance Analysis of a CO_2 Heat Pump Water Heating System Using a Storage Tank With a Movable Insulating Plate : Modeling of Storage Tank and Analysis of System

The Proceedings of the Symposium on Environmental Engineering ◽

10.1299/jsmeenv.2009.19.428 ◽

2009 ◽

Vol 2009.19 (0) ◽

pp. 428-431

Author(s):

Ryohei YOKOYAMA ◽

Tetsushi MIYATA ◽

Tetsuya WAKUI

Keyword(s):

Performance Analysis ◽

Heat Pump ◽

Storage Tank ◽

Heating System ◽

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424 Performance Analysis of a Water Heating System With a Storage Tank Using Phase Change Material : Comparison of Experiment and Numerical Simulation

The Proceedings of the Symposium on Environmental Engineering ◽

10.1299/jsmeenv.2015.25.209 ◽

2015 ◽

Vol 2015.25 (0) ◽

pp. 209-212

Author(s):

Ryohei YOKOYAMA ◽

Junichi MAEKAWA ◽

Masashi OHKURA ◽

Tetsuya WAKUI

Keyword(s):

Numerical Simulation ◽

Performance Analysis ◽

Phase Change ◽

Phase Change Material ◽

Storage Tank ◽

Heating System ◽

Water Heating ◽

Change Material

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