Analysis of the system response of a spray passive downdraft evaporative cooling system

Kang, Daeho; Strand, Richard Karl

doi:10.1016/j.buildenv.2019.04.037

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…However, high relative humidity was observed during the study due to the climate which is hot and humid. There are several some other methods for evaporative cooling such as spray passive Downdraft evaporative cooling (PDEC) which has been intensively investigated such as the work of Kang [46]. In a study conducted by Ana [47] highlighted that use of evaporative cooling systems can achieve thermal comfort level with a free running operation system in the climate of Spain.…”

Section: Evaporative Cooling In Buildingsmentioning

confidence: 99%

“…The study used TAS EDSL 9.4.1, which is considered to be one of the most widely used energy software packages to predict the thermal performance of buildings. This is a globally used software package used for energy analysis studies across the world, including Saudi Arabia [8], Singapore [49], Austria [50], Italy [51,52], Chile [53], Poland [54], the UK [46,55,56], and Turkey [57]. Some of the thermal elements were calculated on the basis of the building material of the Palace (Table 4), such as the solar heat gain, which was affected by the WWR and the type of glazing.…”

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confidence: 99%

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User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation

et al. 2020

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The study investigated the level of thermal comfort in historical buildings located at a relatively high altitude in the Arabian Desert of Saudi Arabia. The study focused on the impact of the use of thermal mass and orientation on the level of thermal performance at Shubra and Boqri Palaces. Qualitative and quantitative analyses were used in this study, including a questionnaire interview with architecture experts living at the relatively high altitude of Taif city, to obtain data and information from local experts. The computer software TAS EDSL was used along with on-site equipment, such as thermal imaging cameras and data loggers, to observe the physical conditions of the building in terms of its thermal performance. The study revealed that the experts’ age and years of experience were important aspects while collecting data from them during the survey. The use of thermal mass had a slight impact on the indoor air temperature as well as the energy consumption, but it helped in providing thermal comfort. Use of ventilation can improve thermal comfort level. Evaporative cooling technique has a considerable impact on reducing indoor air temperature with 4 °C drop, improving the thermal comfort sensation level. The novelty of this work is that, it links the outcomes of qualitative results of experts with field monitoring as well as computer modelling. This can contribute as method to accurately collect data in similar case studies.

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Section: Evaporative Cooling In Buildingsmentioning

confidence: 99%

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confidence: 99%

User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation

et al. 2020

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“…In Ahmedabad, India, the Torrent Research Centre (TRC) efficiently functions with 10-14 °C temperature drops. [10], and in other cases The author draws attention to wet bulb temperatures (WBT) that get as low as 22 °C in a PDEC tower with water spray. The external hot air passing through the water creates comfortable, cool air in the internal spaces.…”

Section: Table 1 Comparative Analysis Of the Literature Review With T...mentioning

confidence: 99%

Traditionally Originated Modern Technology Motivated Passive Downdraft Cooling System: An Eco-friendly Triple Harvest Solution

Bhatia

2024

IOP Conf. Ser.: Earth Environ. Sci.

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With rising heat waves and climate change, the big cities are meshing up with the buildings woven in urban fabric that are becoming power-guzzling air-conditioning machines that increase energy demand multi-fold. This has the side effect of heating up the environment because the return heat from air conditioners mixes with the surrounding air. This dents the microclimate and makes the micro and macro systems worse, as this process is continuous without break. So it will be a disaster for the environment in the future. To mitigate the problem, the paper borrows traditional wisdom to merge with smart technology and create comfortable built spaces in hot-dry and hot-humid weather conditions, based on the principles of evaporative cooling, the venturi effect, and the faraday law of electromagnetic induction. The output of adopting these principles creates comfort conditions for air ventilation with improved air quality and a natural air-conditioning system, ensuring the luxury of contact-free cool air in habitable spaces. The process is based on interoperability, which is built into the system to self-generate and consume renewable energy. The integration of information into the system is a spontaneous cycle of production and consumption of energy. This ensures its self-sufficiency, which bridges the research gap in the design of an upgraded passive downdraft cooling system with three self-sufficient and effective benefits in a single system.

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“…This system consisted of a duct that caught outside air at the top and sprayed water controlled by a pump. The passive downdraught evaporative cooling (PDEC) system cools the air at the top of the building to produce an airflow down to the lower spaces [3]. Cuce et al [4] presented other designs that could be combined with wind towers such as using an evaporative cooling pad at the intake of outdoor air.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Performance of a Passive Downdraught Evaporative Cooling System Driven by Solar Chimneys in a Residential Building by Using an Experimentally Validated TRNSYS Model

Soto

Martínez

2021

Energies

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Natural ventilation, combined with a passive cooling system, can provide significant energy savings in the refrigeration of indoor spaces. The performance of these systems is highly dependent on outdoor climatic conditions. The objective of this study was to analyse the feasibility of a passive, downdraught, evaporative cooling system driven by solar chimneys in different climatic zones by using an experimentally validated simulation tool. This tool combined a ventilation model and a thermal model of the dwelling in which an empirical model of a direct evaporative system made of plastic mesh was implemented. For experimental validation of the combined model, sensors were installed in the dwelling and calibrated in the laboratory. The combined model was applied to Spanish and European cities with different climates. In the simulation, values of cooling energy per volume of air ranging between 0.53 Wh/m3 and 0.79 Wh/m3 were obtained for Alicante (hot climate with moderate humidity) and Madrid (hot and dry climate), respectively. In these locations, medium and high applicability was obtained, respectively, in comparison with Burgos (cold climate with moderate humidity) and Bilbao (cold and humid climate), which were low. The evaluation of the reference building in each location allowed establishing a classification in terms of performance, comfort and applicability for each climate.

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Analysis of the system response of a spray passive downdraft evaporative cooling system

Cited by 14 publications

References 16 publications

User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation

User Thermal Comfort in Historic Buildings: Evaluation of the Potential of Thermal Mass, Orientation, Evaporative Cooling and Ventilation

Traditionally Originated Modern Technology Motivated Passive Downdraft Cooling System: An Eco-friendly Triple Harvest Solution

Analysis of the Performance of a Passive Downdraught Evaporative Cooling System Driven by Solar Chimneys in a Residential Building by Using an Experimentally Validated TRNSYS Model

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