Sustainable Poultry House Ventilation Using Dew Point Indirect Evaporative Cooler Aided With Radiative Cooling

2021 ◽  
Author(s):  
Douaa Al-Assaad ◽  
Nesreen Ghaddar ◽  
Kamel Ghali ◽  
Djamel Ouahrani
Keyword(s):  
Air Quality ◽  
Distribution System ◽  
Thermal Environment ◽  
Cross Flow ◽  
Production Quality ◽  
Dew Point ◽  
Radiative Cooling ◽  
Poultry House ◽  
Evaporative Cooler ◽  
June July

Abstract Maintaining good production quality in layer poultry houses is directly correlated to the thermal environment of the laying hens as well as their breathable air quality. This work compares the performance of two passive cooling systems in meeting the thermal and indoor air quality requirements (CO2, water vapor and NH3) in a layer house in Doha, Qatar characterized by a semi-arid climate. The first system is a standalone cross flow dew point evaporative cooler (DPIEC) supplying air through a localized air distribution system. The second system is a DPIEC aided by a radiative cooling (RC) panel that pre-cools the supply fresh air, in an effort to reduce the system sizing, air and water consumption even further. To achieve these objectives, a modular analysis was adopted, where mathematical models were developed for the DPIEC and RC systems and the poultry house module conditioned by the localized system. A 3D CFD model was developed for the compartment conditioned by the localized system. The DPIEC was sized and the hourly variation in needed supply fresh air and water was determined for the critical month of May, June July of the summer season.

A sustainable localised air distribution system for enhancing thermal environment and indoor air quality of poultry house for semiarid region

2021 ◽  
Vol 203 ◽  
pp. 70-92
Author(s):  
Douaa K. Al Assaad ◽  
Mohamad S. Orabi ◽  
Nesreen K. Ghaddar ◽  
Kamel F. Ghali ◽  
Darine A. Salam ◽  
...  
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Distribution System ◽  
Thermal Environment ◽  
Air Distribution ◽  
Semiarid Region ◽  
Poultry House

Performance enhancement of a cross flow dew point indirect evaporative cooler with circular finned channel geometry

2020 ◽  
pp. 101980
Author(s):  
Muzaffar Ali ◽  
Waqas Ahmad ◽  
Nadeem Ahmed Sheikh ◽  
Hassan Ali ◽  
Rubeena Kousar ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Cross Flow ◽  
Dew Point ◽  
Channel Geometry ◽  
Evaporative Cooler

scholarly journals Thermal Condition and Air Quality Investigation in Commercial Airliner Cabins

2021 ◽  
Vol 13 (13) ◽  
pp. 7047
Author(s):  
Nu Yu ◽  
Yao Zhang ◽  
Mengya Zhang ◽  
Haifeng Li
Keyword(s):  
Air Quality ◽  
Occupational Safety ◽  
Thermal Environment ◽  
Thermal Conditions ◽  
Pressure Change ◽  
Health Administration ◽  
Exposure Limit ◽  
Safety And Health ◽  
The Us ◽  
Carbon Dioxide Co2

Cabin air quality and thermal conditions have a direct impact on passenger and flight crew’s health and comfort. In this study, in-cabin thermal environment and particulate matter (PM) exposures were investigated in four China domestic flights. The mean and standard deviation of the in-cabin carbon dioxide (CO2) concentrations in two tested flights are 1440 ± 111 ppm. The measured maximum in-cabin carbon monoxide (CO) concentration is 1.2 ppm, which is under the US Occupational Safety and Health Administration (OSHA) permissible exposure limit of 10 ppm. The tested relative humidity ranges from 13.8% to 67.0% with an average of 31.7%. The cabin pressure change rates at the end of the climbing stages and the beginning of the descending stages are close to 10 hPa·min−1, which might induce the uncomfortable feeling of passengers and crew members. PM mass concentrations were measured on four flights. The results show that PM concentrations decreased after the aircraft cabin door closed and were affected by severe turbulences. The highest in-cabin PM concentrations were observed in the oldest aircraft with an age of 13.2 years, and the waiting phase in this aircraft generated the highest exposures.

scholarly journals Study on the performance of a unit dew-point evaporative cooler with fibrous membrane and its application in typical regions

2021 ◽  
Vol 24 ◽  
pp. 100881
Author(s):  
Jing Lv ◽  
Haodong Xu ◽  
Tangfuyi Xu ◽  
Hongzhi Liu ◽  
Jiyun Qin
Keyword(s):  
Dew Point ◽  
Fibrous Membrane ◽  
Evaporative Cooler

Improving cabin thermal environment of parked vehicles under direct sunlight using a daytime radiative cooling cover

2021 ◽  
Vol 190 ◽  
pp. 116776
Author(s):  
Yinyan Lv ◽  
Anchong Huang ◽  
Jian Yang ◽  
Jingtao Xu ◽  
Ronggui Yang
Keyword(s):  
Thermal Environment ◽  
Radiative Cooling ◽  
Direct Sunlight

On the exergy analysis of the counter-flow dew point evaporative cooler

Energy ◽  
2018 ◽  
Vol 165 ◽  
pp. 958-971 ◽  
Author(s):  
Jie Lin ◽  
Duc Thuan Bui ◽  
Ruzhu Wang ◽  
Kian Jon Chua
Keyword(s):  
Exergy Analysis ◽  
Dew Point ◽  
Counter Flow ◽  
Evaporative Cooler

scholarly journals Two-dimensional numerical study of a heat and mass exchanger for a dew-point evaporative cooler

Energy ◽  
2019 ◽  
Vol 168 ◽  
pp. 975-988 ◽  
Author(s):  
Yuting Liu ◽  
Jun Ming Li ◽  
Xu Yang ◽  
Xudong Zhao
Keyword(s):  
Numerical Study ◽  
Dew Point ◽  
Two Dimensional ◽  
Evaporative Cooler ◽  
Mass Exchanger

scholarly journals Design of a dew point evaporative cooler for buildings in Mediterranean climate

2019 ◽  
Vol 111 ◽  
pp. 02021
Author(s):  
Djallel Abada ◽  
Chadi Maalouf ◽  
Tala MOUSSA ◽  
Amel Ferial Boudjabi ◽  
Guillaume Polidori ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Mediterranean Climate ◽  
Electricity Consumption ◽  
Dew Point ◽  
Outdoor Air ◽  
New Techniques ◽  
Cooling Effectiveness ◽  
Crucial Problem ◽  
Cooling Technology ◽  
Evaporative Cooler

Refreshing air remains a crucial problem in warm climates where electricity consumption for air conditioning has become excessive and irrational for several years, notably in Algeria. Research in this field is increasingly oriented towards new techniques that can reduce costs and environmental impacts. Among these techniques, the evaporative dew point cooling technology is the most promising as it can cool outdoor air to temperatures below its wet bulb temperature. The aim of this work is to model and design a dew point cooler for french and algerian climates. This model is used to study the effect of the cooler parameters such as its length, water temperature and working air ratio on its cooling effectiveness and supply temperature.

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