The relationship between indoor and outdoor temperature and humidity in two types of residence

염지선,이기영,이대엽,김근배,유승도 한국냄새환경학회 2014 실내환경 및 냄새 학회지 Vol.13 No.4

Residential thermal conditions are important because people spend the majority of their time in the homeenvironment. Indoor temperature and relative humidity(RH) were measured continuously over 1 year in 14residences in Seoul, Korea. The relationship between residential indoor and outdoor conditions were determinedby four meteorological parameters-temperature, apparent temperature(AT), RH, and absolute humidity(AH). Outdoor and indoor temperature, AT and AH were closely correlated, but RH was not. While indoor temperatures,AT, and AH were significantly higher than the corresponding outdoor levels, indoor RH was significantly lowerthan outdoor RH. Regression models between indoor and outdoor temperature detected a heating threshold at15.0oC of outdoor temperature. The indoor thermal conditions were significantly different by the two residencetypes. Indoor temperatures in apartments were lower in summer and higher in winter than those in detached houses. However, indoor RHs in apartments were lower than in detached houses. During tropical nights, the dailytemperature range was higher in residences with air-conditioning than in naturally ventilated residences.

The relationship between indoor and outdoor temperature and humidity in two types of residence

Jiseon Yeom,Daeyeop Lee,Kiyoung Lee,John D,Spengler,Geun Bae Kim,Seung Do Yu 한국실내환경학회 2014 한국실내환경학회지 Vol.13 No.4

Residential thermal conditions are important because people spend the majority of their time in the home environment. Indoor temperature and relative humidity(RH) were measured continuously over 1 year in 14 residences in Seoul, Korea. The relationship between residential indoor and outdoor conditions were determined by four meteorological parameters-temperature, apparent temperature(AT), RH, and absolute humidity(AH). Outdoor and indoor temperature, AT and AH were closely correlated, but RH was not. While indoor temperatures, AT, and AH were significantly higher than the corresponding outdoor levels, indoor RH was significantly lower than outdoor RH. Regression models between indoor and outdoor temperature detected a heating threshold at 15.0oC of outdoor temperature. The indoor thermal conditions were significantly different by the two residence types. Indoor temperatures in apartments were lower in summer and higher in winter than those in detached houses. However, indoor RHs in apartments were lower than in detached houses. During tropical nights, the daily temperature range was higher in residences with air-conditioning than in naturally ventilated residences.

The relationship between indoor and outdoor temperature and humidity in two types of residence

Jiseon Yeom,Daeyeop Lee,Kiyoung Lee,John D. Spengler,Geun Bae Kim,Seung Do Yu 한국냄새환경학회 2014 실내환경 및 냄새 학회지 Vol.13 No.4

Residential thermal conditions are important because people spend the majority of their time in the home environment. Indoor temperature and relative humidity(RH) were measured continuously over 1 year in 14 residences in Seoul, Korea. The relationship between residential indoor and outdoor conditions were determined by four meteorological parameters-temperature, apparent temperature(AT), RH, and absolute humidity(AH). Outdoor and indoor temperature, AT and AH were closely correlated, but RH was not. While indoor temperatures, AT, and AH were significantly higher than the corresponding outdoor levels, indoor RH was significantly lower than outdoor RH. Regression models between indoor and outdoor temperature detected a heating threshold at 15.0oC of outdoor temperature. The indoor thermal conditions were significantly different by the two residence types. Indoor temperatures in apartments were lower in summer and higher in winter than those in detached houses. However, indoor RHs in apartments were lower than in detached houses. During tropical nights, the daily temperature range was higher in residences with air-conditioning than in naturally ventilated residences.

Changes of Behavioral and Physiological Responses Caused by Color Temperature

이영창,민윤기,민병찬,김보성 한국감성과학회 2015 감성과학 Vol.18 No.2

LED lighting has an advantage of adjusting color temperature. This change of color temperature may derive change in behavioral and physiological responses of the visual perception for indoor environments. This research examined the changes of behavioral and physiological responses caused by the color temperature. The environment was configured that the indoor temperature was 20 degrees centigrade or less as the perceived uncomfortable environment in winter. Then, the comfortable sensation vote (CSV) and the results of 3-back working memory test were measured as behavioral responses. In addition, the Electrodermal Activity (EDA) and Electrocardiogram (ECG) were measured as the responses of autonomics nervous system (ANS) in the three conditions of color temperature (red: 3862K, white: 5052K, blue: 11,460K). As a result, behavioral responses were not significant by the condition of color temperature, but the tendency of occupants’ physiological relaxation appeared in the blue color temperature condition compared with the white color temperature condition. Although the color temperature of LED lighting might be a small factor in terms of the characteristics of indoor environment, it suggests that the color temperature could have an impact on the physiological changes in the parasympathetic nervous system.

Monitoring Pig Body Temperature Using Infrared Sensors

( Jin Cheol Jang ),( Min Ho Lee ),( Jun Yeop Lee ),( Hee Chul Choi ),( Dong Yun Choi ),( Hyeok Ju Kim ),( Hyeon Tae Kim ) 한국농업기계학회 2015 바이오시스템공학 Vol.40 No.4

Purpose: The purpose of this study is to verify the feasibility of using an infrared sensor to measure the body temperature of a sow. We first conducted experiments on three pigs by using three infrared sensors and one indoor temperature sensor. Methods: The three infrared sensors were installed inside our model house and were used to take temperature measurements per second of the backs of the pigs. While feeding, the temperatures of the backs of the pigs were measured at distances of 10 cm, 20 cm, and 30 cm from the infrared sensors. Results: We concluded that the relation between the temperature of the pigs` backs and the indoor temperature was y =0.549x + 18.459 at a measuring distance of 30 cm. The relation was y = 0.645x + 15.461 for a distance of 20 cm and y = 0.760x + 11.913 for a distance of 10 cm. We found high correlation between the indoor temperature and the temperature of the pigs` backs. Conclusions: It is possible to use an infrared thermometer to monitor the temperature of pigs` backs. This system seems to be feasible and effective in monitoring pig temperature. The use of an infrared thermometer will also make daily monitoring easy. In later experiments, the possibility of developing a system that can determine if an error can be corrected by using infrared sensor is explored by considering humidity variables.

Changes of Behavioral and Physiological Responses Caused by Color Temperature

Lee, Young-Chang,Min, Yoon-Ki,Min, Byung-Chan,Kim, Boseong Korean Society for Emotion and Sensibility 2015 감성과학 Vol.18 No.2

LED lighting has an advantage of adjusting color temperature. This change of color temperature may derive change in behavioral and physiological responses of the visual perception for indoor environments. This research examined the changes of behavioral and physiological responses caused by the color temperature. The environment was configured that the indoor temperature was 20 degrees centigrade or less as the perceived uncomfortable environment in winter. Then, the comfortable sensation vote (CSV) and the results of 3-back working memory test were measured as behavioral responses. In addition, the Electrodermal Activity (EDA) and Electrocardiogram (ECG) were measured as the responses of autonomics nervous system (ANS) in the three conditions of color temperature (red: 3862K, white: 5052K, blue: 11,460K). As a result, behavioral responses were not significant by the condition of color temperature, but the tendency of occupants' physiological relaxation appeared in the blue color temperature condition compared with the white color temperature condition. Although the color temperature of LED lighting might be a small factor in terms of the characteristics of indoor environment, it suggests that the color temperature could have an impact on the physiological changes in the parasympathetic nervous system.

Monitoring Pig Body Temperature Using Infrared Sensors

장진철,이민호,이준엽,최희철,최동윤,김혁주,김현태 한국농업기계학회 2015 바이오시스템공학 Vol.40 No.4

Purpose: The purpose of this study is to verify the feasibility of using an infrared sensor to measure the body temperature of a sow. We first conducted experiments on three pigs by using three infrared sensors and one indoor temperature sensor. Methods: The three infrared sensors were installed inside our model house and were used to take temperature measurements per second of the backs of the pigs. While feeding, the temperatures of the backs of the pigs were measured at distances of 10 cm, 20 cm, and 30 cm from the infrared sensors. Results: We concluded that the relation between the temperature of the pigs’ backs and the indoor temperature was y =0.549x + 18.459 at a measuring distance of 30 cm. The relation was y = 0.645x + 15.461 for a distance of 20 cm and y = 0.760x + 11.913 for a distance of 10 cm. We found high correlation between the indoor temperature and the temperature of the pigs’ backs. Conclusions: It is possible to use an infrared thermometer to monitor the temperature of pigs’ backs. This system seems to be feasible and effective in monitoring pig temperature. The use of an infrared thermometer will also make daily monitoring easy. In later experiments, the possibility of developing a system that can determine if an error can be corrected by using infrared sensor is explored by considering humidity variables.

Monitoring Pig Body Temperature Using Infrared Sensors

Jang, Jin Cheol,Lee, Min Ho,Lee, Jun Yeop,Choi, Hee Chul,Choi, Dong Yun,Kim, Hyeok Ju,Kim, Hyeon Tae Korean Society for Agricultural Machinery 2015 바이오시스템공학 Vol.40 No.4

Purpose: The purpose of this study is to verify the feasibility of using an infrared sensor to measure the body temperature of a sow. We first conducted experiments on three pigs by using three infrared sensors and one indoor temperature sensor. Methods: The three infrared sensors were installed inside our model house and were used to take temperature measurements per second of the backs of the pigs. While feeding, the temperatures of the backs of the pigs were measured at distances of 10 cm, 20 cm, and 30 cm from the infrared sensors. Results: We concluded that the relation between the temperature of the pigs' backs and the indoor temperature was y =0.549x + 18.459 at a measuring distance of 30 cm. The relation was y = 0.645x + 15.461 for a distance of 20 cm and y = 0.760x + 11.913 for a distance of 10 cm. We found high correlation between the indoor temperature and the temperature of the pigs' backs. Conclusions: It is possible to use an infrared thermometer to monitor the temperature of pigs' backs. This system seems to be feasible and effective in monitoring pig temperature. The use of an infrared thermometer will also make daily monitoring easy. In later experiments, the possibility of developing a system that can determine if an error can be corrected by using infrared sensor is explored by considering humidity variables.

Changes of Behavioral and Physiological Responses Caused by Color Temperature

( Young Chang Lee ),( Yoon Ki Min ),( Byung Chan Min ),( Bo Seong Kim ) 한국감성과학회 2015 감성과학 Vol.18 No.2

LED lighting has an advantage of adjusting color temperature. This change of color temperature may derive change in behavioral and physiological responses of the visual perception for indoor environments. This research examined the changes of behavioral and physiological responses caused by the color temperature. The environment was configured that the indoor temperature was 20 degrees centigrade or less as the perceived uncomfortable environment in winter. Then, the comfortable sensation vote (CSV) and the results of 3-back working memory test were measured as behavioral responses. In addition, the Electrodermal Activity (EDA) and Electrocardiogram (ECG) were measured as the responses of autonomics nervous system (ANS) in the three conditions of color temperature (red: 3862K, white: 5052K, blue: 11,460K). As a result, behavioral responses were not significant by the condition of color temperature, but the tendency of occupants’ physiological relaxation appeared in the blue color temperature condition compared with the white color temperature condition. Although the color temperature of LED lighting might be a small factor in terms of the characteristics of indoor environment, it suggests that the color temperature could have an impact on the physiological changes in the parasympathetic nervous system.

Implementation of adaptive indoor comfort temperature control via embedded system for air-conditioning unit

Thananchai Leephakpreeda 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.1

Environmental control strategy via computerized implementation is one of the most efficient approaches to integrate new advanced knowledge in research of human thermal comfort to a mechanical air-conditioning unit. Recently, a new conceptual development in designing air-conditioning systems has indicated that the indoor comfort temperature strongly depends upon changes of the outdoor air temperature rather than to be a conventional fixed temperature set-point. The explanation is due to occupants’ adaptability of thermal comfort to a dynamic environment in terms of their clothing and/or activities while the outdoor temperature can be explicitly used as an ultimate indicator of such changes to empirical function of the indoor comfort temperature. In this paper, the first prototype embedded system is developed to emulate such an adaptive algorithm to numerically determine an indoor comfort temperature for a real-time control in an air-conditioning system. From a theoretical point of view, an adaptive comfort model together with grey prediction model is presented for exploring a practical application of a comfort temperature-based control for a single air-conditioned space, so as to show the viability of the proposed methodology by simulated results. The field studies by interview survey of satisfaction on thermal comfort within an air-conditioned reading room of a library confirm the viability of the proposed real-time computerized implementation of adaptive indoor comfort temperature via the embedded system for a conventional air-conditioning unit in practical uses.