scholarly journals Valorization of Local Construction and Technique: Hygrothermal Behavior, Thermal and Visual Comfort of a Nubian Vaulted Construction in Sahelian Climate of Ouagadougou

2020 ◽  
pp. 110-123
Author(s):  
Fati Zoma ◽  
David Y. K. Toguyeni ◽  
Barkwendé Jude Kiemtoré ◽  
Emmanuel Ouedraogo
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Time Lag ◽  
Visual Comfort ◽  
Comfort Zone ◽  
Time Step ◽  
Natural Lighting ◽  
Hygrothermal Behavior ◽  
Thermal Amplitude ◽  
Indoor And Outdoor Environments

This study allowed appreciating hygrothermal behavior, thermal comfort and the visual comfort of an existing Nubian vaulted building in the city of Ouagadougou. To achieve that purpose, we measured parameters such as the temperature and relative humidity of the indoor and outdoor environments as well as illumination by daylight inside the studied building. The measurement campaign consisted of two (02) series of three (03) days in January 2018: one series with insulation of the louvered openings by polystyrene and the other series without the insulation. We carried out the measurements of relative humidity and illumination at 7, 10, 12, 15, 17, 20 and 22 o'clock and adopted a one-hour measurement time step for temperatures. The analysis of these parameters showed that the level of natural lighting in the building was insufficient. In addition, for the indoor ambiance, we have obtained indoor thermal amplitude less than 1.5°C, a decrement factor of less than 6%, a time lag of 6 to 8 hours. As for operative temperatures, they are within the thermal comfort zone of the Givonni diagram. As for the couple (Temperature, Relative Humidity), the thermal comfort zone proposed by Givonni is reached when the louver openings are insulated.

scholarly journals Thermal Impacts of the Internal Courtyards in Compound Houses: The Case of Tamale Metropolis

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
Abdul Manan Dauda
Keyword(s):  
Social Interaction ◽  
Relative Humidity ◽  
Thermal Comfort ◽  
Air Conditioning ◽  
Thermal Conditions ◽  
Comfort Zone ◽  
Tamale Metropolis ◽  
American Society ◽  
Building Designs ◽  
Indoor Conditions

The research seeks to understand the effects of internal courtyards onthermal comfort conditions in compound houses in Ghana’s TamaleMetropolitan area. Internal courtyards are an integral part of the design ofcompound houses in this location.Their inclusion in building designs is largely as a point of domestic activitysuch as cooking and cleaning and also for social interaction. However, a lotof interchanges in thermal conditions between structures and the outdoorstake place within these internal courtyards. Various design details of thebuilding will engender different thermal responses of the internal courtyard.This paper assesses thermal comfort in compound houses as againstbungalow type houses in the Tamale Metropolis, Ghana by the applicationof the Predicted Percentage of Dissatisfied Persons (PPD) and PredictedMean Votes (PMV) model. This prototype compares with the InternationalStandards Organization (ISO) 7730 and American Society of Heating,Refrigeration and Air-Conditioning Engineers (ASHRAE) Standard 55(estimated values between 23˚C - 26˚C seen as the allowable temperatures).Ambient indoor conditions (dry bulb temperature and relative humidity)of five (5) buildings each from the two building typologies from wererecorded over a period of ten calendar months. These ambient conditionswere analyzed, consequently generating the Predicted Percentage ofDissatisfied Persons (PPD) and Predicted Mean Votes (PMV) recordings.The investigations uncovered relatively high PPD - PMV recordingsrelating to the Bungalow type buildings while the compound housesattune to the comfort zone. The Actual Mean Votes (AMV) of residentssuggests the two building typologies are all rated comfortable however; thecompound houses are rated above the bungalow type houses.

scholarly journals Evaluation of Thermal Comfort of Kindergarten Buildings

2017 ◽  
Vol 9 (4) ◽  
pp. 488-494
Author(s):  
Juozas Bielskus ◽  
Giedrius Šiupšinskas ◽  
Dovydas Rimdžius
Keyword(s):  
Air Quality ◽  
Relative Humidity ◽  
Thermal Comfort ◽  
Co2 Concentration ◽  
Comfort Level ◽  
Actual Situation ◽  
Comfort Zone ◽  
Co2 Levels ◽  
Calculated Average

The aim of the article is to evaluate the actual situation of thermal comfort in old non-modernized and modernized kindergartens in Lithuania. In this case, the level of thermal comfort and air quality of two modernized and two non-modernized kindergartens is ana- lyzed. In order to evaluate the level of comfort and air quality of the kindergartens, the air temperature, relative humidity and CO2 levels in the air were measured. The study follows the EN ISO 7730 International Standard’s methodology based on Fanger’s Comfort Model. The results of the research presented in this article are supported by the indicators of thermal comfort and CO2 concentration values. According to the calculated average thermal comfort values, the thermal comfort level of two mod- ernized kindergartens and one non-modernized kindergarten falls within the bounds of the comfort zone. Though, the results of CO2 concentration measurements show that in all the kindergartens during the working days CO2 concentration always exceeds the standard requirements.

scholarly journals Analisis Perhitungan Beban Pendinginan Ruang Dhammasala Vihara Padumuttara menggunakan Metode CLTD

2020 ◽  
Vol 12 (2) ◽  
pp. 57-64
Author(s):  
Ananda Karuna Jaya ◽  
Caesar Ondolan Harahap ◽  
Rahmi Andarini
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Temperature Difference ◽  
Previous Literature ◽  
Cooling Load ◽  
Hvac System ◽  
Comfort Zone ◽  
Literature Study ◽  
Indoor Temperature ◽  
Load Calculation

Dhammasala room of Padumuttara Temple has an indoor temperature of 28,56oC and relative humidity of 80,6%. According to SNI 03-6572-2001 and a previous literature study, this temperature is outside the thermal comfort zone for tropical climate. Aiming to improve thermal comfort of Dhammasala room with an HVAC system efficiently, the cooling load of the room is analyzed using the Cooling Load Temperature Difference  (CLTD) method. The results are also compared with results from other cooling load calculation sofware. The recommended HVAC System for Dhammasala room of Padumuttara Temple is a chiller with a capacity of 30-40TR.

SETING ALAMI SEBAGAI SARANA ANAK UNTUK MENGATASI TEKANAN LINGKUNGAN DI KAMPUNG KOTA

2017 ◽  
Vol 11 (6) ◽  
pp. 279
Author(s):  
Sativa Sativa ◽  
Bakti Setiawan ◽  
Djoko Wijono ◽  
MG Adiyanti
Keyword(s):  
Thermal Comfort ◽  
Economic Value ◽  
School Age Children ◽  
Limited Area ◽  
Natural Setting ◽  
School Age ◽  
Exploratory Research ◽  
Visual Comfort ◽  
Environmental Press ◽  
Settlement Area

Abstract: Nowadays, the majority of Indonesian people live in the dense urban kampungs. Some of those kampungs laid on the riverside, as a marginal area -- due to their low economic value of the land. They have specific conditions especially on the limitation of infrastructures and facilities for children activities in the settlement area. This research is a part of my dissertation paper, which aims to gain how children (mainly school-age children) coping with such condition. This study is a qualitative exploratory research, meanwhile, observation and interview were used as collecting data methods. Kampung Ngampilan in Yogyakarta, Indonesia, was chosen as a case area, because of its unique characteristics: located on the riverside of Winongo River, had a high density, and most people have low economics. As the result, this study found that natural setting, especially river area and its surrounding vegetation, is a focus location for children to release live stress in their settlement, due to two space aspects: thermal comfort and visual comfort. This condition was triggered by the limited area of their house so that the children prefer to go out from their house especially after attending school in the afternoon. This results will be useful as a reference for urban kampung planning, especially in riverfront area.Keywords: children, kampung, environmental press, natural settingAbstrak: Mayoritas penduduk kota Indonesia tinggal di kampung berkepadatan tinggi. Sebagian dari kampung -kampung berada di bantaran sungai sebagai salah satu area kota yang dianggap marginal karena nilai ekonomi lahan rendah. Kampung-kampung umumnya berkondisi khas dan memiliki keterbatasan infrastruktur termasuk fasilitas untuk kegiatan anak-anak di permukiman. Studi ini merupakan bagian dari disertasi penulis, yang bertujuan mengetahui bagaimana anak-anak (terutama anak usia sekolah dasar) menghadapi tekanan lingkungan. Kampung Ngampilan dipilih karena merupakan kampung kota yang sangat padat, terletak di tepi sungai, berkontur curam, dan warganya termasuk kelompok ekonomi menengah ke bawah. Kajian ini menggunakan metode kualitatif eksploratif, dan penggalian data dilakukan dengan metode observasi lapangan dan wawancara. Penelitian menemukan, seting alami kampung, khususnya sungai dan vegetasi di sekitarnya, merupakan area pilihan utama anak bermain, karena memiliki dua aspek kenyamanan, yaitu kenyamanan termal dan kenyamanan visual. Pilihan anak-anak dipicu oleh kondisi rumah mereka yang sempit, sehingga mereka lebih memilih keluar rumah sepulang sekolah atau sore hari. Temuan ini dapat menjadi acuan bagi pengembangan kampung kota Indonesia yang lebih kondusif untuk anak, khususnya kampung tepi sungai.Kata kunci: seting alami, tekanan lingkungan, kampung kota, anak

scholarly journals Thermal Performance of Single-Story Air-Welled Terraced House in Malaysia: A Field Measurement Approach

2020 ◽  
Vol 13 (1) ◽  
pp. 201
Author(s):  
Pau Chung Leng ◽  
Gabriel Hoh Teck Ling ◽  
Mohd Hamdan Ahmad ◽  
Dilshan Remaz Ossen ◽  
Eeydzah Aminudin ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Thermal Performance ◽  
Field Measurement ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Wet Bulb Globe Temperature ◽  
Natural Lighting ◽  
Ventilation Performance ◽  
Globe Temperature

The provision requirement of 10% openings of the total floor area stated in the Uniform Building By-Law 1984 Malaysia is essential for natural lighting and ventilation purposes. However, focusing on natural ventilation, the effectiveness of thermal performance in landed residential buildings has never been empirically measured and proven, as most of the research emphasized simulation modeling lacking sufficient empirical validation. Therefore, this paper drawing on field measurement investigates natural ventilation performance in terraced housing with an air-well system. The key concern as to what extent the current air-well system serving as a ventilator is effective to provide better thermal performance is to be addressed. By adopting an existing single-story air-welled terrace house, indoor environmental conditions and thermal performance were monitored and measured using HOBO U12 air temperature and humidity, the HOBO U12 anemometer, and the Delta Ohm HD32.3 Wet Bulb Globe Temperature meter for a six-month duration. The results show that the air temperature of the air well ranged from 27.48 °C to 30.92 °C, with a mean relative humidity of 72.67% to 79.25%. The mean air temperature for a test room (single-sided ventilation room) ranged from 28.04 °C to 30.92 °C, with a relative humidity of 70.16% to 76.00%. These empirical findings are of importance, offering novel policy insights and suggestions. Since the minimum provision of 10% openings has been revealed to be less effective to provide desirable thermal performance and comfort, mandatory compliance with and the necessity of the bylaw requirement should be revisited.

Design Range of Indoor Relative Humidity in Radiant Cooling Environment

2011 ◽  
Vol 243-249 ◽  
pp. 4905-4908
Author(s):  
Xue Min Sui ◽  
Xu Zhang ◽  
Guang Hui Han
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Mean Radiant Temperature ◽  
Design Standards ◽  
Human Thermal Comfort ◽  
Radiant Cooling ◽  
Climate Parameter ◽  
Radiant Temperature ◽  
Thermal Comfort Model ◽  
The Impact

Relative humidity is an important micro-climate parameter in radiant cooling environment. Based on the human thermal comfort model, this paper studied the effect on PMV index of relative humidity, and studied the relationship of low mean radiant temperature and relative humidity, drew the appropriate design range of indoor relative humidity for radiant cooling systems.The results show that high relative humidity can compensate for the impact on thermal comfort of low mean radiant temperature, on the premise of achieving the same thermal comfort requirements. However, because of the limited compensation range of relative humidity, together with the constraints for it due to anti-condensation of radiant terminal devices, the design range of relative humidity should not be improved, and it can still use the traditional air-conditioning design standards.

scholarly journals PROJETO ARQUITETÔNICO PARA RELOCAÇÃO DA NOVA BIBLIOTECA PÚBLICA MUNICIPAL E PARQUE DE LEITURA – CIDADE DE PRESIDENTE PUDENTE/SP

2018 ◽  
Vol 2 (Especial 2) ◽  
pp. 867-871
Author(s):  
Patrícia Portioli Mathias Teixeira ◽  
Korina Aparecida Teixeira Ferreira da Costa
Keyword(s):  
People With Disabilities ◽  
Visual Comfort ◽  
The Public ◽  
Natural Lighting ◽  
Great Circulation ◽  
The City

The project of the new municipal library comes with the intention of creating a space that is inviting for people to enter, use and stay doing the integration of the public with the place and promoting the approximation with the habit of reading, attracting the public through meeting points and leisure that allows you to stay. The project also brings a brief rescue to the memory of the former occupation of the building that was Cine Cine Gomes very well known in the city of Presidente Prudente. With the great circulation of pedestrians were proposed environments that start in the outside with a square and open parklets, and with the transparency of the building makes visible the interior attracting the public into the library, in addition to providing natural lighting and ventilation for greater visual comfort and thermal room inside the building, with spaces accessible for people with disabilities.

scholarly journals Thermal comfort index in lactating cows in an adapted free-stall facility

2020 ◽  
Vol 11 (4) ◽  
Author(s):  
João Marcos de Carvalho Vasconcelos ◽  
Sindynara Ferreira ◽  
Elisa De Souza Junqueira Rezende ◽  
José Luiz de Andrade Rezende Pereira
Keyword(s):  
Body Temperature ◽  
Relative Humidity ◽  
Thermal Comfort ◽  
Experimental Period ◽  
Temporal Variations ◽  
Holstein Cattle ◽  
Black And White ◽  
Comfort Index ◽  
Lactating Cows ◽  
Comfort Indices

This study was conducted to investigate the thermoregulation of Holstein cattle in an adapted free-stall facility at IFSULDEMINAS, Campus Inconfidentes, by measuring thermal comfort indices. The experimental period was from the end of December 2012 to the start of January 2013, in a total of 16 days. 12 multiparous, lactating, black-and-white Holstein cows were used in a free-stall system. Rectal temperature, respiratory frequency, ambient temperature and relative humidity were recorded at 3:00 a.m., 7:00 a.m., 11:00 a.m., 3:00 p.m., 7:00 p.m. and 11:00 p.m. The results demonstrate that despite the temporal variations that occurred throughout the evaluation days, the confined animals maintained their body temperature in balance.

scholarly journals Comparative study on thermal comfort responses and sleep quality between Indonesian and Japanese students during summer in Japan

2021 ◽  
Vol 896 (1) ◽  
pp. 012074
Author(s):  
W Budiawan ◽  
K Tsuzuki ◽  
H Sakakibara
Keyword(s):  
Relative Humidity ◽  
Sleep Quality ◽  
Comparative Study ◽  
Thermal Comfort ◽  
Thermal Sensation ◽  
Temperate Climate ◽  
Japanese Students ◽  
The Mean

Abstract The comfort temperature and sleep quality of Indonesian residing in Japan during summer might be different from Japanese. As an extended previous research, this study aimed to compare the thermal comfort and sleep quality between Japanese and Indonesian students. Male Indonesian and Japanese students aged 20-35 years participated in this study. The participants completed a survey regarding thermal sensation before sleep. During sleep, actigraphy was used to monitor sleep. Additionally, the temperature and relative humidity of the participants’ bedrooms were recorded. The findings of this study indicated that Indonesian students’ bedroom temperature and relative humidity were not significantly different from those of Japanese students during the summer. Most of Indonesian students preferred neutral, like the Japanese students. According to a thermal comfort survey, Indonesians had the same sensation as Japanese (slightly comfortable). However, the Griffiths method revealed that the mean comfort temperature of Indonesian was higher than those of Japanese students. We also discovered that Indonesian students had shorter duration on bed and sleep minute than Japanese students. Furthermore, the sleep rate of Indonesian students was comparable to that of Japanese students. In conclusion, Indonesian students as tropical native became capable of adjusting to the hot and humid conditions in temperate climate, Japan.

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