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Dive into the research topics where Kazuhiro Iwai is active.

Publication


Featured researches published by Kazuhiro Iwai.


Aij Journal of Technology and Design | 2017

STUDY ON THE HIGH INSULATION WOODEN SASH: – Environmental performance evaluation of the sash with multi-layer glazing –@@@-複層ガラスを用いたサッシの環境性能評価-

Yuta Tomizawa; Yoshiharu Asano; Kazuhiro Iwai; Koichiro Arai

Demand of thermal insulation renovation with an emphasis on cost is I considered to increase in the future. So, we went in the development of highly insulated wooden sash of thermal transmittance 0.5[W/m2·K]. In this study, we compare production when CO2 emissions, the CO2 emission reduction effect when attached to the actual housing for the model with three glass that reduce the number of models and the glass using four glass is, it is an object of promotion of low-carbon society by opening repair.


Aij Journal of Technology and Design | 2007

ANNUAL MEASUREMENT OF INDOOR THERMAL ENVIRONMENT IN TEST HOUSE WITH ZERO HEATING LOAD CONCEPT CONSTRUCTED IN NAGANO CITY

Ayano Hiai; Akira Yamanoi; Masamichi Terasawa; Kazuhiro Iwai; Yasuhiro Yamashita; Kenichi Hasegawa

A super insulated test house was constructed in Shinshu University of Nagano city. This house was designed with zero heating load concept and its heat loss coefficient is 0.72W/m2K. The thermal environment and energy consumption were monitored for one year. Measured results reveal the possibility for no energy consumption for space heating with both high thermal performance of envelopes and generated heat gain from occupants, lights and so on. Also it is shown through field measurement and numerical analysis that super thermal performance with solar shading and cross ventilation conduce the decrease of energy consumption for space cooling.


Journal of Environmental Engineering (transactions of Aij) | 2004

THE SURVEY OF ENVIRONMENTAL NOISE IN PROVINCIAL CITIES : 19years renewal instructions in Nagano city

Naoki Takagi; Hiroaki Nozawa; Kazuhiro Iwai; Yasuhiro Yamashita


Aij Journal of Technology and Design | 2006

A STUDY ON PRACTICAL USE OF KLIMAATLAS : Part4 Klimaatlas workshop with citizens in Nagano city(Environmental Engineering)

Kazuhiro Iwai; Naoki Takagi; Yuki Takizawa; Chifumi Yamada


Journal of Environmental Engineering (transactions of Aij) | 2005

A STUDY ON ACTUAL WEATHER CONDITIONS CONSIDERING LAND USE AND ALTITUDE IN ADJOINING CITIES : The case of Nagano city and Suzaka city, Japan

Kazuhiro Iwai; Naoki Takagi; Yasuhiro Yamashita


Journal of Environmental Engineering (transactions of Aij) | 2004

ENERGY CONSUMPTION FOR SPACE HEATING OF DETACHED HOUSES IN NAGANO PREFECTURE : From viewpoint of residents' preconception and heating methods

Yusuke Niwa; Hirokazu Nakatani; Kazuhiro Iwai; Yasuhiro Yamashita


Journal of Environmental Engineering (transactions of Aij) | 2003

A TRIAL MANUFACTURE ABOUT SUN SHADOW DIAGRAM FOR URBAN AREA THERMAL ENVIRONMENTAL ANALYSIS

Naoki Takagi; Daiju Kimura; Kazuhiro Iwai; Yasuhiro Yamashita


Journal of Environmental Engineering (transactions of Aij) | 2003

A STUDY ON THE ACTUAL CONDITIONS OF THE URBAN CLIMATE IN THE INLAND PROVINCIAL CITIES

Kazuhiro Iwai; Naoki Takagi; Hiromasa Mitani; Yasuhiro Yamashita


Journal of Architecture and Planning (transactions of Aij) | 1999

A STUDY ON THE URBAN CLIMATE WITH DATA FROM THE METEOROLOGICAL OBSERVATORY IN THE NORTHERN AREA OF NAGANO PREFECTURE

Kazuhiro Iwai; Naoki Takagi


Journal of Environmental Engineering (transactions of Aij) | 2018

A STUDY ON ENERGY CONSUMPTION AND POWER SAVING ACTUAL CONDITION OF DETACHED HOUSES IN NAGANO, YAMANASHI AND NIIGATA BEFORE AND AFTER THE EARTHIQUAKE DISASTER

Kazuhiro Iwai; Yoshiharu Asano; Nanako Fujiki

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Kenichi Hasegawa

Akita Prefectural University

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Eiji Hara

Kokushikan University

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Shigeki Kametani

Tokyo University of Marine Science and Technology

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