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Cover Story The photo in the upper left position on the cover shows the CO2 refrigerant rotary compressor which is provided in ECO CUTE. The photo in the upper right shows the heat transfer pipe of the twist & spiral gas cooler which serves as a heat exchanger between the refrigerant and water. The photo in the center shows the CO2 refrigerant heat pump hot water system, “ECO CUTE”. The photo in the lower left shows the heat exchanger employing micro-channels. The photo in the lower right shows the commercial CO2 refrigerant heat pump hot water system. • Editorial-Chief Ryuichi Yamaguchi • Editorial Advisors Chisato Kobayashi Yasuyuki Sano Makoto Egashira Junichi Kitsuki Hiroaki Kawachi Masayuki Masuda Satoshi Itoda Kiyoji Kawai Kazuhisa Hemmi Taizo Kittaka Hidenori Takita Itsuo Seki Katsuhiro Hase Kazumasa Mitsunaga • Vol. 120 Feature Articles Editor Satoru Kotoh • Editorial Inquiries Makoto Egashira Corporate Total Productivity Management & Environmental Programs Fax +81-3-3218-2465 • Product Inquiries Strategic R&D Planning Department Advanced Technology R&D Center Fax +81-6-6497-7285 Mitsubishi Electric Advance is published on line quarterly (in March, June, September, and December) by Mitsubishi Electric Corporation. Copyright © 2007 by Mitsubishi Electric Corporation; all rights reserved. Printed in Japan. CONTENTS Technical Reports Overview ..........................................................................................1 by Fumiaki Baba The Current Status of and Future Trends in Heat Pump Technologies with Natural Refrigerants .......................................2 by Naoki Tanaka and Satoru Kotoh Development of CO2 Heat Pump Hot Water System “ECOCUTE” ....................................................................................6 by Tetsuji Okada Rotary Compressor for a CO2 Heat Pump Water Heater by Hideaki Maeyama and Shinichi Takahashi .............9 Wear-Reducing Technologies for Rotary Compressors Using CO2 Refrigerant .....................................................................................13 by Hideto Nakao and Naotaka Hattori Performance Analysis of Scroll Compressors Using CO2 Refrigerant .....................................................................................17 by Mihoko Shimoji and Toshiyuki Nakamura Prototype and Performance Evaluation of Refrigerant-Refrigerant Microchannel Heat Exchanger ....................................................20 by Susumu Yoshimura and Shinichi Wakamoto Dec. 2007 / Vol. 120 MITSUBISHI ELECTRIC ADV ANCE Heat Pump with Natural RefrigerantsPDF Image | Heat Pump with Natural Refrigerants 3041
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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