日本語フィールド
著者：今井滋、小島昌一 読み: イマイシゲル、コジマショウイチ題名：
Comparison of Thermal Comfort Between Radiant Heating and Convective Heating in Heating Room発表情報：Journal of Engineering, Project, and Production Management, 2015 巻: 5 号: 1 ページ: 26-35キーワード：Thermal comfort, radiant heating, convective heating, SET*, CFD
thermal comfort, radiant heating, convective heating, SET*, CFD概要：抄録：Currently, convective heating with a heat-pump system, which has high energy efficiency, is popular for room heating. However, it is possible that energy savings using convective heating can be further improved using heat pumps that service both occupied and unoccupied spaces. Moreover, convective heating increases vertical temperature gradients in a room; thus, it is hard to say whether occupants are being provided with sufficient thermal comfort. The purpose of this study is to compare the thermal comfort provided by both radiant and convective heating systems. In this study, a small office room was modeled, and then temperature and airflow distributions in the room were calculated by Computational Fluid Dynamics (CFD) simulations using ESP-r (Environmental research simulation software). Furthermore, distributions of Standard Effective Temperatures (SET*) were calculated using the air temperature distributions obtained from the CFD simulations, which allows us to compare the thermal comfort provided by convective heating with that provided by radiant heating. The results show that radiant heating can provide satisfactory thermal comfort, even when the room air temperature is low. However, thermal comfort also depends on the temperature of blowing air, and blowing air must reach occupied regions; thus, only radiant heating cannot circulate sufficient air. In contrast, convective heating increases vertical temperature gradients in a room. Therefore, rather than using only radiant or convective heating, it may be more effective to combine them efficiently.英語フィールド
Author：Shigeru Imai, Shoichi KojimaTitle：
Comparison of Thermal Comfort Between Radiant Heating and Convective Heating in Heating RoomAnnouncement information:Journal of Engineering, Project, and Production Management, 2015 Vol: 5 Issue: 1 Page: 26-35Keyword：Thermal comfort, radiant heating, convective heating, SET*, CFD
thermal comfort, radiant heating, convective heating, SET*, CFDAn abstract：Currently, convective heating with a heat-pump system, which has high energy efficiency, is popular for room heating. However, it is possible that energy savings using convective heating can be further improved using heat pumps that service both occupied and unoccupied spaces. Moreover, convective heating increases vertical temperature gradients in a room; thus, it is hard to say whether occupants are being provided with sufficient thermal comfort. The purpose of this study is to compare the thermal comfort provided by both radiant and convective heating systems. In this study, a small office room was modeled, and then temperature and airflow distributions in the room were calculated by Computational Fluid Dynamics (CFD) simulations using ESP-r (Environmental research simulation software). Furthermore, distributions of Standard Effective Temperatures (SET*) were calculated using the air temperature distributions obtained from the CFD simulations, which allows us to compare the thermal comfort provided by convective heating with that provided by radiant heating. The results show that radiant heating can provide satisfactory thermal comfort, even when the room air temperature is low. However, thermal comfort also depends on the temperature of blowing air, and blowing air must reach occupied regions; thus, only radiant heating cannot circulate sufficient air. In contrast, convective heating increases vertical temperature gradients in a room. Therefore, rather than using only radiant or convective heating, it may be more effective to combine them efficiently.