In-Situ Performance Evaluation of the Desiccant Heating, Ventilating, and Air-Conditioning System Using Multiple Tracer Gas Dilution Method

2016 ◽  
pp. 301-326
Author(s):  
Napoleon Enteria ◽  
Hiroshi Yoshino ◽  
Akashi Mochida ◽  
Rie Takaki ◽  
Akira Satake ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Air Conditioning ◽  
Dilution Method ◽  
Tracer Gas ◽  
Air Conditioning System ◽  
Gas Dilution

Performance Test of Desiccant Heating, Ventilating and Air-Conditioning System by Using Multiple Tracer Gas Dilution Method

2015 ◽  
Vol 23 (04) ◽  
pp. 1550027 ◽  
Author(s):  
Napoleon Enteria ◽  
Hiroshi Yoshino ◽  
Akashi Mochida ◽  
Rie Takaki ◽  
Akira Satake ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Performance Test ◽  
Air Flow ◽  
Dilution Method ◽  
Tracer Gas ◽  
Air Conditioning System ◽  
Flow Rates ◽  
Lecture Room ◽  
Detailed Evaluation ◽  
Gas Dilution

The desiccant-based air-conditioning system consists of many heat and mass transfer components operating together with air fans. The performance test using the multiple tracer gas dilution method is important for knowing the internal and external flow rates, including the air leakages. The results of the test show the actual internal air flow rates and the sources of air leakage, and also show the interaction of air in the air-conditioned lecture room and in the mechanical room. The performance test using the multiple tracer gas dilution method in air flow and air leakages is important for a detailed evaluation of any air-conditioning system such as this desiccant-based one.

scholarly journals Cooling performance of Ceiling Radiant Textile Air Conditioning System with Ceiling Cassette Unit of Packaged Air Conditioner

2019 ◽  
Vol 111 ◽  
pp. 01082
Author(s):  
Toshio Yamanaka ◽  
Mari Kuranaga ◽  
Tatsunori Maeda ◽  
Haruto Kitakaze
Keyword(s):  
Air Conditioning ◽  
Scale Model ◽  
Airflow Rate ◽  
Air Conditioner ◽  
Tracer Gas ◽  
Vertical Temperature ◽  
Air Conditioning System ◽  
Cooling Performance ◽  
The Third ◽  
Vertical Temperature Distribution

The authors developed a new radiant air conditioning system named ceiling radiant textile air conditioning system with ceiling cassette unit of packaged air conditioner (PAC). The nonflammable textile is stretched under the ceiling with ceiling cassette units of PAC with a distance of around 30 cm. The aim of this study is to investigate the cooling performance of this new radiant system, so the experiments with full scale model were conducted for three system. The first system is “textile only”, the second system is “textile with guide for air return grille” and the third system is “textile with guide and opening for air return grille”. Airflow rate through textile is measured by tracer gas method. In all cases, the vertical temperature distribution is almost uniform, and the cooling effect of “textile with guide and opening for air return grille” is the largest. As for the radiant effect, two systems of “only textile” and “textile with guide for air return grille” are superior to “textile with guide and opening for air return grille”. The airflow rate trough textile is doubled when using guide, and increased by five times if the opening was provided under the guide.

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