Experimental study on air change effectiveness: Improving air distribution with all-air heating systems

2017 ◽  
Vol 125 ◽  
pp. 515-527 ◽  
Author(s):  
Hideyuki Amai ◽  
Shichao Liu ◽  
Atila Novoselac
Keyword(s):  
Experimental Study ◽  
Air Distribution ◽  
Heating Systems ◽  
Air Heating

Performance analysis of domestic solar air heating system using V-shaped baffles – An experimental study

2021 ◽  
pp. 095440892110162
Author(s):  
Vijayakumar Rajendran ◽  
Harichandran Ramasubbu ◽  
Karthick Alagar ◽  
Vignesh Kumar Ramalingam
Keyword(s):  
Experimental Study ◽  
Performance Improvement ◽  
Mass Flow ◽  
Thermal Efficiency ◽  
Heating System ◽  
Solar Air Heater ◽  
Absorber Plate ◽  
Air Heating ◽  
Mass Flow Rates ◽  
Carbon Dioxide Mitigation

An experimental study has been carried out to enhance a solar air heater’s performance by integrating artificial roughness through baffles on the absorber plate. In this paper, the thermal and energy matrices analysis of a Solar Air Heater (SAH) roughened with V up perforated baffles have been investigated. The effect of various mass flow rates on the SAH was analyzed with and without baffles. Experimental outputs like outlet air temperature, useful energy (heat) gain and thermal efficiency were evaluated to confirm the performance improvement. The baffled absorber plate SAH was found to give the maximum thermal efficiency and useful energy gain of 89.3% and 1321.37 W at a mass flow rate of 0.0346 kg/s, 13% and 12% higher than SAH without baffle. This result showed that the V up-shaped ribs in flow arrangement provide better thermal performance than smooth plate SAH for the parameter investigated. Energy matrices analysis and carbon dioxide mitigation of the SAH system were also analyzed.

scholarly journals Experimental study on thermal environment in a simulated classroom with different air distribution methods

2021 ◽  
pp. 103025
Author(s):  
Weixin Zhao ◽  
Sami Lestinen ◽  
Panu Mustakallio ◽  
Simo Kilpeläinen ◽  
Juha Jokisalo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Environment ◽  
Air Distribution

scholarly journals Airflow mixing augmentation device for hot-air heating systems in modular boilers

2016 ◽  
Vol 92 ◽  
pp. 01049
Author(s):  
Nikolay I. Kurilenko ◽  
Pavel A. Artamonov ◽  
Elena Yu. Kurilenko ◽  
Gennady Ya. Mamontov
Keyword(s):  
Heating Systems ◽  
Hot Air ◽  
Air Heating

Generating application design data for solar air heating systems

Solar Energy ◽  
1980 ◽  
Vol 25 (6) ◽  
pp. 527-530 ◽  
Author(s):  
T.A. Reddy ◽  
C.L. Gupta
Keyword(s):  
Design Data ◽  
Heating Systems ◽  
Air Heating ◽  
Application Design

scholarly journals An experimental study of the thermal performance of the square and rhombic solar collectors

2018 ◽  
Vol 22 (1 Part B) ◽  
pp. 487-494 ◽  
Author(s):  
Aminreza Noghrehabadi ◽  
Ebrahim Hajidavaloo ◽  
Mojtaba Moravej ◽  
Ali Esmailinasab
Keyword(s):  
Experimental Study ◽  
Flat Plate ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Performance ◽  
Thermal Efficiency ◽  
Solar Collectors ◽  
Heating Systems ◽  
Solar Water Heating

Solar collectors are the key part of solar water heating systems. The most widely produced solar collectors are flat plate solar collectors. In the present study, two types of flat plate collectors, namely square and rhombic collectors are experi?mentally tested and compared and the thermal performance of both collectors is investigated. The results show both collectors have the same performance around noon (?61%), but the rhombic collector has better performance in the morning and afternoon. The values for rhombic and square collectors are approximately 56.2% and 53.5% in the morning and 56.1% and 54% in the afternoon, respectively. The effect of flow rate is also studied. The thermal efficiency of rhombic and square flat plate collectors increases in proportion to the flow rate. The results indicated the rhombic collector had better performance in comparison with the square collector with respect to the mass-flow rate.

scholarly journals Experimental Study on Indoor Thermal Stratification in Large Space by under Floor Air Distribution System (UFAD) in Summer

Engineering ◽  
2011 ◽  
Vol 03 (04) ◽  
pp. 384-388 ◽  
Author(s):  
Xin Wang ◽  
Chen Huang ◽  
Weiwu Cao ◽  
Xuelei Gao ◽  
Wen Liu
Keyword(s):  
Experimental Study ◽  
Distribution System ◽  
Thermal Stratification ◽  
Air Distribution ◽  
Large Space

scholarly journals EXPERIMENTAL STUDY OF DRYING BY THE SOLARIUM VARIABLE BAFFLE SENSOR OF YELLOW AND GREEN LEMON TO KEEP THESE VITAMINS FOR A LASTING AND NATURAL MEDICINAL THERAPY

2018 ◽  
Vol 6 (6) ◽  
pp. 161-177
Author(s):  
Abene Abderrahmane ◽  
Mohamed Salah Eddine Seddiki ◽  
Aurora Morocini Mohamed Si Youcef
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Efficiency ◽  
Solar Panel ◽  
Solar Panels ◽  
Air Heating ◽  
Noticeable Improvement ◽  
Sustainable Conservation ◽  
The Relationship ◽  
Medicinal Therapy

The use of variable baffle solar panels for drying is the low level of heat exchange with the air in the dynamic vein of the solar panel. This weakness in such systems does not provide optimal performance or high thermal efficiency from their use. There is, however, a very noticeable improvement in heat transfer when the baffles are placed in rows in the ducts. To conduct the experiments, solar energy was simulated, the goal being to improve the relationship between temperature and thermal efficiency of a solar panel air heating plane and to use the system to reduce the time to gently dry the lemon to keep these vitamins. lemon and destinine for a sustainable therapy (the lemon promotes the absorption of calcium and in case of rhumet gill or five also to treat sinusitis, against migraine solair dryness and also for sustainable conservation and also for a sustainable medicine for a sustainable medicine.

Experimental Study of Air Distribution Characteristics in Room of Stratum Ventilation under Two Kinds of Air Change Times

2013 ◽  
Vol 409-410 ◽  
pp. 668-672
Author(s):  
Yong Mei Xu ◽  
Jian Tang ◽  
Jun Han ◽  
Chu Qin Lin
Keyword(s):  
Experimental Study ◽  
Thermal Comfort ◽  
Experimental Studies ◽  
Air Distribution ◽  
Distribution Characteristics ◽  
Breathing Zone ◽  
Wind Speeds ◽  
Pollutant Concentrations ◽  
New Type ◽  
Better Than

Aimed at a new type of ventilation - stratum ventilation, air distributions at a breathing-zone in a model office were measured under kinds of air changes, the measure parameters in the experimental studies included temperatures, wind speeds and pollutant concentrations, based on which the thermal comfort at a breathing-zone were studied. Experimental results show that, the temperature, pollutant concentration and wind speeds in a breathing-zone under 5 times air changes are better than those under 6 times air changes. The calculating results of PMV and PPD indicate that the thermal comfort at a breathing-zone under 5 times air changes is better. The experimental study is instructive for the development of the ventilation.

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