scholarly journals Development of Bioclimatic Design Tool for Oman Using Dry Bulb and Dew Point Temperatures Open Database

2017 ◽  
Vol 14 (2) ◽  
pp. 137
Author(s):  
Nasser Al-Azri ◽  
Y. Zurigat ◽  
N. Al-Rawahi
Keyword(s):  
Air Conditioning ◽  
Meteorological Data ◽  
Design Tool ◽  
Dew Point ◽  
Passive Cooling ◽  
Cooling Systems ◽  
Bioclimatic Design ◽  
Passive Cooling Systems

Bioclimatic charts are used by engineers and architects in implementing passive cooling systems and architectural optimization with respect to natural air conditioning. Conventionally, the development of these charts is based on the availability of typical meteorological year which requires a record of meteorological data that are rarely available in sufficient amounts. Bioclimatic charts in Oman were developed earlier by the authors for limited locations based on the available typical meteorological years. Using dry bulb and dew point temperatures only, bioclimatic charts are developed for Adam, Buraimi, Ibra, Muscat, Nizwa, Rustaq, Saiq, Salalah, Suhar and Sur. These charts are better representative of bioclimatic trends since their development is mainly based on the relevant parameters, namely dry bulb temperature and dew point.

scholarly journals Atrium Impact on a School-Building: Thermal Performance in a Hot Climate

Proceedings ◽  
2020 ◽  
Vol 38 (1) ◽  
pp. 18 ◽  
Author(s):  
Romero-Odero ◽  
Galán-Marín ◽  
Rivera-Gómez
Keyword(s):  
Climate Change ◽  
20Th Century ◽  
Air Conditioning ◽  
Passive Cooling ◽  
Cooling Systems ◽  
Hot Climate ◽  
Higher Temperature ◽  
Passive Cooling Systems ◽  
Air Circulation

The process of climate change has increased the planet’s mean temperature. An example of this are the 44.3 °C registered in July in the cities of Córdoba and Seville (Spain). In this scenario, the educational centers in Andalusia, mostly built during the 20th century, are unable to reach the thermal comfort inside the classrooms throughout the year, without resorting to mechanical air conditioning procedures. This study simultaneously monitors indoors, outdoors and transitional spaces of a case study to verify the effectiveness of the passive cooling systems and the Atrium thermal effect of the building. Our results demonstrate that temperatures inside classrooms are influenced by the orientation and their air circulation (atrium or outdoor) and as expected, the higher temperature in the building are registered in the classrooms in the last floor.

scholarly journals Selection and Assessment of Passive Cooling Techniques for Residential Buildings in Oman Using a Bioclimatic Approach

2013 ◽  
Vol 10 (2) ◽  
pp. 52 ◽  
Author(s):  
N Al-Azri ◽  
YH Zurigat ◽  
N Al-Rawahi
Keyword(s):  
Residential Buildings ◽  
Meteorological Data ◽  
Building Design ◽  
Passive Cooling ◽  
Viable Option ◽  
Cooling Systems ◽  
Bioclimatic Variables ◽  
Passive Cooling Systems ◽  
Selection And Assessment ◽  
Psychrometric Chart

 Passive cooling is an ancient technique used in air reconditioning and ventilation. Despite its historical use, its relevance in building design has never ceased. To be sure, with the increasing interest in saving energy and preserving the environment, passive cooling stands out as a sustainable possibility. However, this is not always a viable option, and its practicality is determined mainly by the system's functionality, the type of activities involved in the space to be cooled, and the surrounding area's bioclimatic variables (i.e. temperature, humidity, and diurnal temperature differences). In areas under consideration for passive cooling systems, bioclimatic charts are helpful. Comprehensive charts, in which yearlong hourly meteorological data are projected on a psychrometric chart, help to determine the fits required by a particular location. In this paper, psychrometric charts were developed for eight locations in Oman, and a systematic procedure on the selection and viability of using passive cooling techniques is provided through meteorological data. Givoni's passive cooling zones are used and the applicability of each technique is quantified. The eight study locations are widely scattered around and Oman, and possess great geographical diversity. The presented results can help delineate the applicability of each passive cooling technique for residential buildings at each of the study locations and their proximities. 

scholarly journals Performance Characteristics of Solid-Desiccant Evaporative Cooling Systems

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2574 ◽  
Author(s):  
Ramadas Narayanan ◽  
Edward Halawa ◽  
Sanjeev Jain
Keyword(s):  
Air Conditioning ◽  
Natural Ventilation ◽  
Waste Heat ◽  
Numerical Study ◽  
Evaporative Cooling ◽  
Peak Load ◽  
Dew Point ◽  
Low Grade ◽  
Subtropical Climate ◽  
Cooling Systems

Air conditioning accounts for up to 50% of energy use in buildings. Increased air-conditioning-system installations not only increase total energy consumption but also raise peak load demand. Desiccant evaporative cooling systems use low-grade thermal energy, such as solar energy and waste heat, instead of electricity to provide thermal comfort. This system can potentially lead to significant energy saving, reduction in carbon emissions, and it has a low dew-point operation and large capacity range. Their light weight, simplicity of design, and close-to-atmospheric operation make them easy to maintain. This paper evaluates the applicability of this technology to the climatic conditions of Brisbane, Queensland, Australia, specifically for the residential sector. Given the subtropical climate of Brisbane, where humidity levels are not excessively high during cooling periods, the numerical study shows that such a system can be a potential alternative to conventional compression-based air-conditioning systems. Nevertheless, the installation of such a system in Brisbane’s climate zone requires careful design, proper selection of components, and a cheap heat source for regeneration. The paper also discusses the economy-cycle options for this system in such a climate and compares its effectiveness to natural ventilation.

scholarly journals When social practices produce space and create passive cooling systems in hot arid region

2022 ◽  
Vol 27 ◽  
pp. 932-944
Author(s):  
Ibtissame Benoudjafer
Keyword(s):  
Thermal Comfort ◽  
Arid Regions ◽  
Passive Cooling ◽  
Thermal Mass ◽  
Cooling Load ◽  
Cooling Systems ◽  
Cooling Strategy ◽  
Main Factors ◽  
Dry Climates ◽  
Passive Cooling Systems

Abstract. Practice social of people is the key to produce space and give a possibility to maintain thermal comfort and energy efficiency. The main objective of this research is to adapt the traditional strategies in the architecture actual, to achieved a thermal comfort and improve on reducing cooling load through the using of vernacular gait. Today, it is necessary to practice these systems in the current or conventional architecture of household. The study is especially for arid cities namely the region of Saoura, in the hot and dry climatic zone in Algeria, considered for this study. Two main factors is considered such as design and urban where taken into account in order to select the appropriate and specific passive cooling strategy. The results show that the passive cooling strategy of courtyard would be appropriate for arid regions, however a high thermal mass would be suitable for construction. In conclusion, this work made it possible to choose a suitable passive cooling strategy for all types of construction in hot and dry climates. Finally, this paper puts forward a set of recommendations to improve the passive design of future buildings in hot and arid climates.  

scholarly journals SISTEM SUBGROUND PASSIVE COOLING PADA GEREJA DI CIBUNUT, KUNINGAN, JAWA BARAT

2021 ◽  
Vol 5 (2) ◽  
pp. 177
Author(s):  
Inggit Musdinar Sayekti Sihing Yang Mawantu ◽  
Sri Kurniasih
Keyword(s):  
Data Collection ◽  
Cooling System ◽  
Passive Cooling ◽  
Cold Climates ◽  
Cooling Systems ◽  
Tropical Climates ◽  
Passive Cooling Systems ◽  
The Tropics ◽  
Passive Cooling System ◽  
The Church

Abstract: Subground passive cooling is a passive cooling technique that is carried out by flowing cold air in the ground into the room. The Pasio Christi Church in Cibunut, Kuningan, West Java was founded in 1965. Then the church implemented a passive cooling subground system through renovations carried out on May 11, 2018. This passive cooling system is usually carried out in areas with subtropical to cold climates, however Cibunut who has a tropical climate tries to implement this system. In fact, there is concern if the system is implemented in the tropics, such as humidity entering the system, causing fungal problems that can have an impact on health. . Therefore this research describes the application of the subground passive cooling system in tropical climates with the following steps: (i) data collection in the form of literature studies, (ii) identification of the subground passive cooling system of Cibunut Church, (iii) elaboration of theory regarding subground passive cooling, (iv) analysis of the application of subground passive cooling of the Cibunut church with the results of theoretical elaboration. This research is expected to be able to contribute in science, especially regarding the application of subground passive cooling systems in tropical climates.Abstrak: Subground passive cooling merupakan teknik pendinginan pasif yang dilakukan dengan mengalirkan udara dingin dalam tanah ke dalam ruangan. Gereja Pasio Christi di Cibunut, Kuningan, Jawa Barat didirikan sejak 1965. Lalu gereja ini menerapkan sistem subground passive cooling melalui renovasi yang dilakukan pada 11 Mei 2018. Sistem pendinginan pasif ini biasanya dilakukan pada wilayah dengan iklim subtropis hingga iklim dingin, namun demikian Cibunut yang beriklim tropis mencoba untuk menerapkan sistem ini. Padahal ada kekawatiran jika sistem ini diterapkan di wilayah tropis, seperti kelembaban yang masuk dalam sistem sehingga muncul permasalahan jamur yang dapat berdampak pada kesehatan. Oleh karena itu pada penelitian ini mendiskripsikan mengenai penerapan sistem subground passive cooling pada wilayah beriklim tropis dengan langkah-langkah sebagai berikut : (i) pengumpulan data dalam bentuk studi literatur, (ii) identifikasi sistem subground passive cooling Gereja Cibunut, (iii) elaborasi teori mengenai subground passive cooling, (iv) analisis penerapan subground passive cooling gereja Cibunut dengan hasil elaborasi teori. Dari penelitian ini diharapkan mampu memberikan sumbangsih dalam keilmuan terutama mengenai penerapan sistem subground passive cooling pada wilayah beriklim tropis.

A Passive Ventilation and Air Conditioning System for an Office Space In Hot Climate

2021 ◽  
Author(s):  
Jean Paul Harrouz ◽  
Kamel Ghali ◽  
Nesreen Ghaddar
Keyword(s):  
Thermal Comfort ◽  
Water Consumption ◽  
Air Conditioning ◽  
Cooling System ◽  
Peak Load ◽  
Co2 Concentration ◽  
Electrical Energy ◽  
Dew Point ◽  
Passive Cooling ◽  
Office Space

Abstract Office spaces are characterized by strict constraints of thermal comfort and indoor air quality (IAQ) levels crucial for the occupants’ wellbeing and decision-making abilities. For these reasons, office spaces have large cooling loads especially in hot climates. Conventional vapor compression air conditioning systems are known to be energy intensive systems that rely mainly on electrical energy. Thus, there is a pressing need to decrease the reliance on active cooling systems by the introduction of passive cooling strategies and efficient sustainable buildings. This study proposes an effective passive cooling system that integrates a cross-flow dew point indirect evaporative cooler (DP-IEC) supplying cool clean air to an office space. Validated mathematical models were used to assess the integrated system’s ability in maintaining acceptable thermal comfort and IAQ levels at minimal energy and water consumption. The simulations were carried out for the peak load month for a case study of an occupied office located in the semi-arid and hot Lebanese inland region. The proposed system was able to meet the space thermal and IAQ constraints (average indoor temperature of 25.6 °C, CO2 concentration below 600 ppm). The optimized system operation yielded a daily energy and water consumption of 0.65 kWh and 52 L with a reduction of 80 % in the running cost as compared to the conventional mechanical system.

Sign in / Sign up

Export Citation Format

Share Document