Nishiyodo Air Conditioner Co., Ltd.

Itoh Seiyu Kabushiki Kaisha

Osaka-fu

Osaka Prefecture Government

Yukio Fujishima

Susumu Kusakawa

Yasuhiro Hatano

Masami Ogata

Akira Aoki

Sadaaki Tsuji

Tohru Isoda

Taizo Imoto

Yusuke Makio

Toshimasa Irie

Yukitoshi Hatano

Tamotsu Ishikawa

Tadashi Okamura

Shuhei Miyauchi

Masayuki Kawabata

A method of operating a heat pump having at least one circuit for circulation of a refrigerant comprising a compressor, a once-through path, complete counterflow type condenser as a high-temperature heat output means, an expansion valve and a low-temperature heat output means (evaporator or a segregated low-stage circuit for circulation of a lower-boiling-point refrigerant), which comprises choosing a supercool degree, which is equal to the difference between a saturation temperature and an outlet temperature of the refrigerant, to satisfy the conditions that a temperature effectiveness of refrigerant liquid as defined by the formula: ##EQU1## is at least 40% and the temperature difference of the denominator is at least 35.degree. C. As a result, boiling water of ca. 100.degree. C. or other high-temperature fluids can be discharged with a large temperature difference.

Method of operating heat pump

A powder electroluminescent element which comprises electroluminescent particles and an organic binder at least partly comprising a polyurethane shows a high emission intensity or brightness and has a prolonged operating life.

Powder electroluminescent element comprising inorganic

Growing community of inventors

Sakai, Japan

Yukio Fujishima