DETERMINING INDOOR THERMAL COMFORT CONDITION OF KUTAI HOUSE THROUGH BIOCLIMATIC ANALYSIS

2020 ◽  
Vol 7 (1) ◽  
pp. 151
Author(s):  
Mohamad Zaki Yusof ◽  
Husna Afifi ◽  
Suzana Said
Keyword(s):  
Thermal Comfort ◽  
Quantitative Research ◽  
Building Materials ◽  
Harmful Effect ◽  
Comfort Zone ◽  
Indoor Thermal Comfort ◽  
Comfort Parameters ◽  
Comfort Condition ◽  
Palm Leave

Conserving the traditional Malay Kutai houses as our building heritage is important before they perish due to neglection. For maintenance purposes, the palm leave roofs are replaced with more durable materials such as zinc or onduline roof sheets. Replacing the building materials without understanding their properties could cause harmful effect on the indoor thermal comfort. Previously, there is minimal quantitative research done to prove that the traditional Malay house is thermally comfortable. Thus, this research intends to measure the thermal comfort parameters of Kutai house and analyse the result using a bioclimatic chart. The results revealed that the average thermal comfort conditions of the Kutai houses are within the boundaries of comfort zone as recommended for natural ventilated buildings despite using zinc roof.

scholarly journals Influence of Attached Sunspaces on Indoor Thermal Comfort. The Case Study of a Traditional Asturian House

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1392
Author(s):  
Susana Lage-Cal ◽  
M. B. Folgueras-Díaz ◽  
Juan Carlos Luengo-García
Keyword(s):  
Thermal Comfort ◽  
Thermal Impact ◽  
Indoor Thermal Comfort ◽  
The North ◽  
North Of Spain ◽  
Comfort Condition ◽  
Atlantic Area

Attached sunspaces are widely employed in the higher floors of traditional residences in the North of Spain. More specifically, in Asturias, it is easy to find them south-oriented and cantilever-positioned. This helps to take the greatest advantage of sun rays, especially during long winter months, and provides a ground-leveled, rain-protected, arcaded space. The function of such space is being a passing area (if it is to be found in a city house), or an exterior mudroom (if it is to be found in a country estate). With respect to the thermal impact of attached sunspaces in inner comfort condition, it is worth determining whether they are truly valuable elements, suitable to be employed in contemporary passive residences in the Atlantic area, or if their climate-dependant performance invalidates such use.

scholarly journals Models for Prediction of Daily Mean Indoor Temperature and Relative Humidity: Education Building in Izmir, Turkey

2011 ◽  
Vol 21 (6) ◽  
pp. 772-781 ◽  
Author(s):  
Türkan Göksal Özbalta ◽  
Alper Sezer ◽  
Yusuf Yıldız
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Mean Squared Error ◽  
System Size ◽  
Climatic Conditions ◽  
Ann Model ◽  
Data Logger ◽  
Indoor Temperature ◽  
Indoor Thermal Comfort ◽  
Comfort Parameters

In this research, several models were developed to forecast the daily mean indoor temperature (IT) and relative humidity values in an education building in Izmir, Turkey. The city is located at a hot–humid climatic region. In order to forecast the IT and internal relative humidity (IRH) parameters in the building, a number of artificial neural networks (ANN) models were trained and tested with a dataset including outdoor climatic conditions, day of year and indoor thermal comfort parameters. The indoor thermal comfort parameters, namely, IT and IRH values between 6 June and 21 September 2009 were collected via HOBO data logger. Fraction of variance ( R2) and root-mean squared error values calculated by the use of the outputs of different ANN architectures were compared. Moreover, several multiple regression models were developed to question their performance in comparison with those of ANNs. The results showed that an ANN model trained with inconsiderable amount of data was successful in the prediction of IT and IRH parameters in education buildings. It should be emphasized that this model can be benefited in the prediction of indoor thermal comfort conditions, energy requirements, and heating, ventilating and air conditioning system size.

Indoor Thermal Comfort and its Effect on Building Energy Consumption

2011 ◽  
Vol 71-78 ◽  
pp. 3516-3519 ◽  
Author(s):  
Xue Bin Yang ◽  
De Fa Sun ◽  
Xiang Jiang Zhou ◽  
Ling Ling Cai ◽  
Ying Ji
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Savings ◽  
Thermal Sensation ◽  
Building Energy ◽  
Building Energy Consumption ◽  
Predicted Mean Vote ◽  
Indoor Thermal Comfort ◽  
Air Speed ◽  
Comfort Parameters

The indoor thermal comfort and its effect on building energy consumption have been conducted by literature reviewing in the study. The linear relationship and the related formulations of various thermal comfort indictors are summarized to evaluate the human comfort. These parameters include predicted mean vote, thermal sensation vote, adaptive predicted mean vote, thermal comfort vote, and thermal acceptability. Under different climatic or regional conditions, both relationships between thermal comfort parameters and indoor or outdoor air temperature, and between comfort vote and another comfort parameter, are summarized for their definition and formulation. The comfort parameters such as local air speed, neutral temperature, PMV set point and others will directly impact the building energy usage. It is of significance to seek an optimal alternative for energy savings.

scholarly journals Does a neutral thermal sensation determine thermal comfort?

2018 ◽  
Vol 39 (2) ◽  
pp. 183-195 ◽  
Author(s):  
Sally Shahzad ◽  
John Brennan ◽  
Dimitris Theodossopoulos ◽  
John K Calautit ◽  
Ben R Hughes
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Building Design ◽  
Thermal Preference ◽  
Practical Application ◽  
Comfort Zone ◽  
Indoor Thermal Environment ◽  
Human Thermal Comfort ◽  
Comfort Condition

The neutral thermal sensation (neither cold, nor hot) is widely used through the application of the ASHRAE seven-point thermal sensation scale to assess thermal comfort. This study investigated the application of the neutral thermal sensation and it questions the reliability of any study that solely relies on neutral thermal sensation. Although thermal-neutrality has already been questioned, still most thermal comfort studies only use this measure to assess thermal comfort of the occupants. In this study, the connection of the occupant’s thermal comfort with thermal-neutrality was investigated in two separate contexts of Norwegian and British offices. Overall, the thermal environment of four office buildings was evaluated and 313 responses (three times a day) to thermal sensation, thermal preference, comfort, and satisfaction were recorded. The results suggested that 36% of the occupants did not want to feel neutral and they considered thermal sensations other than neutral as their comfort condition. Also, in order to feel comfortable, respondents reported wanting to feel different thermal sensations at different times of the day suggesting that occupant desire for thermal comfort conditions may not be as steady as anticipated. This study recommends that other measures are required to assess human thermal comfort, such as thermal preference. Practical application: This study questions the application of neutral thermal sensation as the measure of thermal comfort. The findings indicate that occupant may consider other sensations than neutral as comfortable. This finding directly questions the standard comfort zone (e.g. ASHRAE Standard 55) as well as the optimum temperature, as many occupants required different thermal sensations at different times of the day to feel comfortable. These findings suggest that a steady indoor thermal environment does not guarantee thermal comfort and variations in the room temperature, which can be controlled by the occupant, need to be considered as part of the building design.

scholarly journals COMPARATIVE STUDY ON THE THERMAL ENVIRONMENTAL RESPONSES OF INDIGENOUS BAMBOO AND MODERN BRICK HOUSES IN HOT-HUMID CLIMATE OF MALAYSIA

2016 ◽  
Vol 78 (11) ◽  
Author(s):  
Nur Dalilah Dahlan ◽  
Amirhosein Ghaffarianhoseini
Keyword(s):  
Thermal Comfort ◽  
Building Materials ◽  
Humid Climate ◽  
Night Time ◽  
Indoor Thermal Comfort ◽  
Environmental Responses ◽  
American Society ◽  
House Design ◽  
Hot Humid Climate ◽  
East Asia Region

Vernacular houses using indigenous building materials have shown to be a good strategy for sustainable energy consumption without compensating the occupant’s indoor thermal comfort. Bamboo has been identified as the most used building material for vernacular houses in South-East Asia region. However, very little investigation has been conducted to study the passive performance of a bamboo house in maintaining indoor thermal comfort. This study compares the indoor microclimate conditions using thermal comfort Predicted Mean Vote and Predicted Percentage of Dissatisfied models (PMV-PPD) developed by American Society Heating, Refrigerating and Air-conditioning Engineers  (ASHRAE) between indigenous bamboo house (H1) and modern  brick house (H2) at a village located in the Ulu Gombak Forest Reserve, Selangor. Observations on environmental factors and predicted thermal comfort satisfaction level between day and night times were also taken into consideration. The findings suggest that the use of bamboo plus other vernacular house design features such as raising a house on stilts, located on hilly site and providing air permeability in H1 can lead to a thermally comfortable indoor environment, particularly during night time.

scholarly journals THERMAL COMFORT STUDY OF TEACHERS' ROOM AT SEKOLAH BINA MULIA PONTIANAK

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Albert Suryajaya ◽  
Tri Wibowo Caesariadi
Keyword(s):  
Mechanical Ventilation ◽  
Thermal Comfort ◽  
Building Materials ◽  
Ventilation System ◽  
Neutral Condition ◽  
Average Value ◽  
Average Temperature ◽  
Wind Circulation ◽  
Air Ventilation ◽  
Comfort Condition

Thermal comfort is one of the important aspects to ensure the comfort of a building. School building, e.g. Sekolah Bina Mulia, Pontianak is used for education activities for about eight hours a day. The teachersfourth floor and still applies the natural air ventilation system while other rooms use mechanical ventilation system. It is interesting to see thermal comfort condition in the ort of the room depends on the environment. Because of its position on the fourth floor, the wind circulation can flow freely and the application of air ventilation is possible. The average temperature is 29.599ºC, 71.216% for relative humidity and 0.143 m/s for wind speed, and 29.482ºC for MRT. The average value of PMV is 1.615. The thermal comfort value, based on the average of PPS*(PMV) calculation for three days observation is 0.130 and it is the neutral condition. This means the room is comfort for the users and it is mainly because  of the windows, sun shading, and the building materials which support the natural air ventilation of the school Kenyamanan termal merupakan salah satu aspek penting untuk memastikan suatu bangunan dapat memberikan kenyamanan bagi penggunanya. Bangunan sekolah, seperti Sekolah Bina Mulia Pontianak merupakan bangunan pendidikan yang digunakan kurang lebih delapan jam dalam satu hari. Ruang guru pada sekolah Bina Mulia, yang terletak pada lantai empat masih menggunakan sistem ventilasi udara alami sementara ruangan lain menggunakan sistem penghawaan mekanikal. Kenyamanan termal pada ruangan tentu sangat tergantung pada Keadaan lingkungan. Karena posisinya yang cukup tinggi, pergerakan udara pada ruangan juga lebih bebas. Artinya, aplikasi ventilasi udara alami sangat memungkinkan. Nilai temperatur udara rata-rata pada ruangan adalah 29,599 ºC, kelembaban 71,216%, kecepatan udara 0,143 m/det dan nilai temperatur radiasi 29,482ºC. Nilai PMV rata-rata pada ruangan adalah 1,615. Nilai PPS*(PMV) rata-rata pada ruangan tersebut dalam tiga hari pengamatan adalah 0,130 dan merupakan kondisi netral. Ini artinya ruangan tersebut nyaman bagi penggunanya, yang pada dasarnya dikarenakan sistem jendela, pelindung matahari, dan material bangunan dapat mendukung ventilasi udara alami pada bangunan

Investigating the Impact of Ornamental Plants Correlated with Indoor Thermal Comfort and Eco-Energy

2017 ◽  
Vol 8 (5) ◽  
pp. 221
Author(s):  
Sugiono Sugiono ◽  
Suluh E. Swara ◽  
Wisnu Wijanarko ◽  
Dwi H. Sulistyarini
Keyword(s):  
Thermal Comfort ◽  
Ornamental Plants ◽  
Indoor Thermal Comfort ◽  
The Impact

scholarly journals Impacts on Indoor Thermal Comfort and Heating Energy Use in Hellenic Dwellings from Occupant Behavioral Reactions

2021 ◽  
Vol 11 (14) ◽  
pp. 6254
Author(s):  
Elena G. Dascalaki ◽  
Constantinos A. Balaras
Keyword(s):  
Thermal Comfort ◽  
Energy Use ◽  
Energy Savings ◽  
Local Heating ◽  
Economic Recession ◽  
Heating System ◽  
Building Stock ◽  
Heating Systems ◽  
Indoor Thermal Comfort ◽  
Energy Audits

In an effort to reduce the operational cost of their dwellings, occupants may even have to sacrifice their indoor thermal comfort conditions. Following the economic recession in Greece over recent years, homeowners have been forced to adapt their practices by shortening heating hours, lowering the indoor thermostat settings, isolating spaces that are not heated or even turning off their central heating system and using alternative local heating systems. This paper presents the results from over 100 occupant surveys using questionnaires and walk-through energy audits in Hellenic households that documented how occupants operated the heating systems in their dwellings and the resulting indoor thermal comfort conditions and actual energy use. The results indicate that the perceived winter thermal comfort conditions were satisfactory in only half of the dwellings, since the actual operating space heating periods averaged only 5 h (compared with the assumed 18 h in standard conditions), while less than half heated their entire dwellings and only a fifth maintained an indoor setpoint temperature of 20 °C, corresponding to standard comfort conditions. Mainstream energy conservation measures include system maintenance, switching to more efficient systems, reducing heat losses and installing controls. This information is then used to derive empirical adaptation factors for bridging the gap between the calculated and actual energy use, making more realistic estimates of the expected energy savings following building renovations, setting prudent targets for energy efficiency and developing effective plans toward a decarbonized building stock.

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