ANALYSIS OF TRANSPORT AIRCRAFT CABIN AIR CONDITIONING REQUIREMENTS WITH SPECIAL REFERENCE TO AIR FRESHNESS, TEMPERATURE, AND HUMIDITY CONTROL

1946 ◽  
Author(s):  
Bruce E. Del Mar
Keyword(s):  
Special Reference ◽  
Air Conditioning ◽  
Humidity Control ◽  
Transport Aircraft ◽  
Aircraft Cabin ◽  
Temperature And Humidity

scholarly journals Temperature and Humidity Control for the Next Generation Greenhouses: Overview of Desiccant and Evaporative Cooling Systems

2021 ◽  
Author(s):  
Muhammad Sultan ◽  
Hadeed Ashraf ◽  
Takahiko Miyazaki ◽  
Redmond R. Shamshiri ◽  
Ibrahim A. Hameed
Keyword(s):  
Molecular Sieves ◽  
Air Conditioning ◽  
Activated Carbons ◽  
Evaporative Cooling ◽  
Next Generation ◽  
Cooling Systems ◽  
Humidity Control ◽  
Climatic Regions ◽  
Multi Stage ◽  
Temperature And Humidity

Temperature and humidity control are crucial in next generation greenhouses. Plants require optimum temperature/humidity and vapor pressure deficit conditions inside the greenhouse for optimum yield. In this regard, an air-conditioning system could provide the required conditions in harsh climatic regions. In this study, the authors have summarized their published work on different desiccant and evaporative cooling options for greenhouse air-conditioning. The direct, indirect, and Maisotsenko cycle evaporative cooling systems, and multi-stage evaporative cooling systems have been summarized in this study. Different desiccant materials i.e., silica-gels, activated carbons (powder and fiber), polymer sorbents, and metal organic frameworks have also been summarized in this study along with different desiccant air-conditioning options. However, different high-performance zeolites and molecular sieves are extensively studied in literature. The authors conclude that solar operated desiccant based evaporative cooling systems could be an alternate option for next generation greenhouse air-conditioning.

Influence of Temperature and Humidity Control in Air Conditioning on Indoor Environment Quality and Human Feelings

2012 ◽  
Vol 256-259 ◽  
pp. 2648-2651
Author(s):  
Yu Ping Sun ◽  
Neng Zhu
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Air Conditioning ◽  
Indoor Environment ◽  
Climatic Conditions ◽  
Humidity Control ◽  
Environment Quality ◽  
Indoor Environment Quality ◽  
Temperature And Humidity

In this study, the oxygen contents of the indoor air quality in different climatic conditions in a chamber were real-time monitored. At the same time, ten young volunteers sit in the three different environment conditions to fill subject feeling questionnaires. The climatic conditions referred to three groups of hot and humid environment (30°C, 35°C, 40°Cdry bulb temperature and 90% relative humidity). The results reveal the oxygen content of indoor air quality slightly decreased in different thermal environments, the values within normal variations. Questionnaire statistic results indicate that the temperature and humidity control in air conditioning significantly influence the human feelings. Thirsty, head heavy, tired, irritability, distraction, chest tightness and cold sweating are the main emerging symptoms in such indoor environments. Reasonable control of indoor temperature and humidity has vital importance to indoor environment quality.

scholarly journals Improving the Storage of Some Food Categories to Reduce the Irretrievable Losses of a Retailer: Methodology Analysis

2021 ◽  
Vol 295 ◽  
pp. 01031
Author(s):  
Elena Trapeznikova
Keyword(s):  
Air Conditioning ◽  
Negative Impact ◽  
Food Storage ◽  
Optimal Temperature ◽  
Humidity Control ◽  
Storage Technology ◽  
Temperature And Humidity ◽  
Dispersing Medium ◽  
Storage Facilities

Retailers conventionally store perishable foods in refrigerated display cases to keep them at specific temperatures; air conditioning dries the air in the room, which in turn causes these foods to lose moisture. Water as a dispersing medium and a solvent affects the consistency, structure, and appearance of foods in storage. However, excessive moistness will also jeopardize the quality of foods by providing fungi and bacteria with good conditions for growth. Conventional food storage technology does not involve humidity control; as a result, food appearance and quality degrades, and the intensive food drying results in excessive shrink-related costs to the retailer. To minimize the negative impact of such overdrying of perishable foods on the retailer’s economy, storage facilities must provide optimal temperature and humidity. In this research, the author monitor and compare the write-offs labeled as ‘defective’ and the irretrievable shrink-related losses to identify and analyze the effectiveness of humidity control-enabled refrigeration units when used to store some foods categories in refrigerated display cases.

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