SlideShare a Scribd company logo
Passive Air Cooling System and Solar
Water Heater with Phase Change
Material for Low Energy Buildings in
Hot Arid Climate
Prof. Dr. Amr Abdallah
Solar
chimney
with
PCM
Introduction
Ventilation can be achieved inside buildings due
to strong solar radiation while having large
limitations in the system after sunset and at
nighttime.
1 Solar chimneys are renewable energy systems
that provide natural ventilation in buildings.
2
The integration of phase change material with a
solar chimney is increasing worldwide.
3
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Solar
chimney
with
solar
heater
Solar water heaters are one of the solar thermal
application of using renewable energy, that can
collect sunlight in the outdoor rooftop to heat
water using a pump to circulate water.
1
Recently solar water heater has been integrated
with other solar other techniques such as a solar
chimney, Phase Change Material (PCM) and
others.
2
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Introduction
No experimental studies were found for
integration passive cooling system, solar
chimney and solar water heater for low energy
building in a hot arid climate, Egypt.
Aims
Improvement of thermal performance of passive
air condition with a solar chimney integrated
with a solar water heater to be applied during
day time and night time in a hot dry climate.
Introduction
To integrate three techniques based on
improving solar chimney by using thermal
storage to increase system performance during
night time.
Importance
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Experimental set-up for
solarchimney and wind
tower
The experiment in this study is done in two stages.
The first stage is investigation and
improvement of a solar chimney
with Phase Change Material and
MWCNTs as a separate system and
integrated with solar water heated.
The second stage is done to integrate
improvement of a solar chimney and
heating water system with full scale test
house and a passive cooling tower built in
Assiut University (El-Gorib site).
1
2
First Stage
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
The second stage is done to investigate improvement of solar
chimney model to achieve night cooling with wind tower and
passive cooling.
Second Stage
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Materials and Preparation for
improvement of solar chimney
Examination of Multi-Walled Carbon
Nanotubes (MWCNTs) was done in
Housing and Building National Research
Center (HBRC), Egypt to increase
absorption of solar radiation for the solar
chimney integrated with PCM and
increase chimney performance during
nighttime.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Methodology
Measurement is carried out after painting aluminium
plate with black painting mixed with MWCNTs
without integration of PCM, and then integration of
PCM.
Monitoring for outdoor air temperature and air cavity
temperature, surface temperature of aluminium plate,
air velocity was done during beginning of hot period
(April and May) of year.
Integration of solar chimney will be done to full-scale
test house with passive cooling wind tower after
improvement of solar chimney during hot period in
June and July.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
 It is observed that surface temperature of aluminium plate
increased with PCM greater than without PCM with values equal to
77.8 C and 68 C, respectively, which agrees with previous research.
Solar chimney evaluation and improvement
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
 Maximum solar radiation of 1089 W/m2 during middle of day (12 pm)
causes a rise in chimney air temperature and airspeed with a maximum
value of 62 C and 7 m/s respectively when outdoor temperature is 44 C.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
 The decrease of aluminium
surface temperature
gradually after sunset causes
also a gradual decrease in
airspeed without a sudden
drop and a significant high
airspeed greater than 1.5 m/s
during night time that is too
high than published past
research without integration
of PCM.
 It is observed that
temperature decreases
gradually after 12 pm
with a maximum
temperature of around
47 C during sunset.
 Then, surface
temperature decreases
gradually with a
maximum
temperature of 34.5 C
during midnight
compared to a
temperature equal to
29.5 without
integration of PCM.
After the integration of PCM.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Temperature and humidity evaluation inside the test house
• Reduction of indoor temperature is achieved with 80% of acceptable
range according to adaptive comfort standard.
. The outdoor temperature decreases gradually after it passes through
wet pad with a maximum temperature difference equal 8 k during day
time and minimum temperature difference equal 4 k during night time.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Indoor room relative humidity after cooling is within acceptable range
according to past literature. Most of indoor condition after sunset and
night time is very close to summer comfort zone.
the psychrometric chart of the condition inside the room after
cooling.
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Thermal Comfort Evaluation
The calculation of PMV and PPD was
done based on Fanger’s model. The
condition is within comfort range
except during middle of the day.
While during night time, it is within
the recommended range (0.5 <
PMV<+0.5) .
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
01 03 04
02
Conclusion
The water
heating system
integrated with
solar chimney
achieved water
temperature
equal to 58 C
and 40 C during
2 pm and after
sunset
respectively.
Significant
reduction for
room air
temperature
between 8 and
4 k during day
and night time
respectively
and
improvement
in building
energy
A significant
increase for the
average airflow
rate in the solar
chimney equal
1.5 kg/s
corresponding to
high solar
radiation of
1089 W/m2.
The new system
can achieve air
cooling system
with fresh air
and heating
water
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
Dr. Amr Sayed Hassan Abdallah
professor, Dept. of Architecture, Assiut University
https://www.youtube.com/
watch?v=trxzzlCpbrk
Here video for the system
THANK
YOU

More Related Content

Similar to Passive Air Cooling System and Solar Water Heater.ppt

capstone
capstonecapstone
capstone
Vikash Tiwari
 
Solar oven ProjectReport
Solar oven ProjectReportSolar oven ProjectReport
Solar oven ProjectReport
Mohammad Molani
 
The impact of outdoor thermal environment on iraqi building
The impact of outdoor thermal environment on iraqi buildingThe impact of outdoor thermal environment on iraqi building
The impact of outdoor thermal environment on iraqi building
Alexander Decker
 
H1302045356
H1302045356H1302045356
H1302045356
IOSR Journals
 
Integrated solar water heater for domestic use
Integrated solar water heater for domestic useIntegrated solar water heater for domestic use
Integrated solar water heater for domestic use
Tikrit Uninversity/ College of Engineering/Mechanical Eng.Dept
 
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
Nirav Soni
 
Sac soe
Sac soeSac soe
Final Edit.pptx
Final Edit.pptxFinal Edit.pptx
Final Edit.pptx
SHEKHARMISHRA55
 
THERMAL COMFORT IN ARCHITECTURE EDUCATION
THERMAL COMFORT IN ARCHITECTURE EDUCATIONTHERMAL COMFORT IN ARCHITECTURE EDUCATION
THERMAL COMFORT IN ARCHITECTURE EDUCATION
SHAHEENPARVEEN56
 
20120140505012
2012014050501220120140505012
20120140505012
IAEME Publication
 
Solar photovoltaic/thermal air collector with mirrors for optimal tilts
Solar photovoltaic/thermal air collector with mirrors for  optimal tiltsSolar photovoltaic/thermal air collector with mirrors for  optimal tilts
Solar photovoltaic/thermal air collector with mirrors for optimal tilts
IJECEIAES
 
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
Amanda O'Donnell
 
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATIONEXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
ADEIJ Journal
 
Extended_Abstract
Extended_AbstractExtended_Abstract
Extended_Abstract
Hasitha Geeshan Ketanwila
 
Ijetcas14 508
Ijetcas14 508Ijetcas14 508
Ijetcas14 508
Iasir Journals
 
Portfolio Protogeros Nikolaos
Portfolio Protogeros NikolaosPortfolio Protogeros Nikolaos
Portfolio Protogeros Nikolaos
Nikolaos Protogeros
 
Experimental study of a tubular solar still with phase change material
Experimental study of a tubular solar still with phase change materialExperimental study of a tubular solar still with phase change material
Experimental study of a tubular solar still with phase change material
IAEME Publication
 
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
IAEME Publication
 
Symposium Poster
Symposium PosterSymposium Poster
Symposium Poster
Michael Durr
 
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
Waqas Tariq
 

Similar to Passive Air Cooling System and Solar Water Heater.ppt (20)

capstone
capstonecapstone
capstone
 
Solar oven ProjectReport
Solar oven ProjectReportSolar oven ProjectReport
Solar oven ProjectReport
 
The impact of outdoor thermal environment on iraqi building
The impact of outdoor thermal environment on iraqi buildingThe impact of outdoor thermal environment on iraqi building
The impact of outdoor thermal environment on iraqi building
 
H1302045356
H1302045356H1302045356
H1302045356
 
Integrated solar water heater for domestic use
Integrated solar water heater for domestic useIntegrated solar water heater for domestic use
Integrated solar water heater for domestic use
 
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
ARTICLE 58 IJAET VOLII ISSUE III JULY SEPT 2011
 
Sac soe
Sac soeSac soe
Sac soe
 
Final Edit.pptx
Final Edit.pptxFinal Edit.pptx
Final Edit.pptx
 
THERMAL COMFORT IN ARCHITECTURE EDUCATION
THERMAL COMFORT IN ARCHITECTURE EDUCATIONTHERMAL COMFORT IN ARCHITECTURE EDUCATION
THERMAL COMFORT IN ARCHITECTURE EDUCATION
 
20120140505012
2012014050501220120140505012
20120140505012
 
Solar photovoltaic/thermal air collector with mirrors for optimal tilts
Solar photovoltaic/thermal air collector with mirrors for  optimal tiltsSolar photovoltaic/thermal air collector with mirrors for  optimal tilts
Solar photovoltaic/thermal air collector with mirrors for optimal tilts
 
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
D5-7 Solar control mechanisms for enhanced thermal comfort and daylight contr...
 
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATIONEXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
EXPERIMENTAL STUDY ON SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
 
Extended_Abstract
Extended_AbstractExtended_Abstract
Extended_Abstract
 
Ijetcas14 508
Ijetcas14 508Ijetcas14 508
Ijetcas14 508
 
Portfolio Protogeros Nikolaos
Portfolio Protogeros NikolaosPortfolio Protogeros Nikolaos
Portfolio Protogeros Nikolaos
 
Experimental study of a tubular solar still with phase change material
Experimental study of a tubular solar still with phase change materialExperimental study of a tubular solar still with phase change material
Experimental study of a tubular solar still with phase change material
 
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
EXPERIMENTAL STUDY OF A TUBULAR SOLAR STILL WITH PHASE CHANGE MATERIAL
 
Symposium Poster
Symposium PosterSymposium Poster
Symposium Poster
 
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
Thermal Storage Comparison for Variable Basement Kinds of a Solar Chimney Pro...
 

Recently uploaded

6th International Conference on Machine Learning & Applications (CMLA 2024)
6th International Conference on Machine Learning & Applications (CMLA 2024)6th International Conference on Machine Learning & Applications (CMLA 2024)
6th International Conference on Machine Learning & Applications (CMLA 2024)
ClaraZara1
 
Literature Review Basics and Understanding Reference Management.pptx
Literature Review Basics and Understanding Reference Management.pptxLiterature Review Basics and Understanding Reference Management.pptx
Literature Review Basics and Understanding Reference Management.pptx
Dr Ramhari Poudyal
 
basic-wireline-operations-course-mahmoud-f-radwan.pdf
basic-wireline-operations-course-mahmoud-f-radwan.pdfbasic-wireline-operations-course-mahmoud-f-radwan.pdf
basic-wireline-operations-course-mahmoud-f-radwan.pdf
NidhalKahouli2
 
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
IEEE Aerospace and Electronic Systems Society as a Graduate Student MemberIEEE Aerospace and Electronic Systems Society as a Graduate Student Member
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
VICTOR MAESTRE RAMIREZ
 
Wearable antenna for antenna applications
Wearable antenna for antenna applicationsWearable antenna for antenna applications
Wearable antenna for antenna applications
Madhumitha Jayaram
 
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELDEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
gerogepatton
 
132/33KV substation case study Presentation
132/33KV substation case study Presentation132/33KV substation case study Presentation
132/33KV substation case study Presentation
kandramariana6
 
digital fundamental by Thomas L.floydl.pdf
digital fundamental by Thomas L.floydl.pdfdigital fundamental by Thomas L.floydl.pdf
digital fundamental by Thomas L.floydl.pdf
drwaing
 
Embedded machine learning-based road conditions and driving behavior monitoring
Embedded machine learning-based road conditions and driving behavior monitoringEmbedded machine learning-based road conditions and driving behavior monitoring
Embedded machine learning-based road conditions and driving behavior monitoring
IJECEIAES
 
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
University of Maribor
 
Properties Railway Sleepers and Test.pptx
Properties Railway Sleepers and Test.pptxProperties Railway Sleepers and Test.pptx
Properties Railway Sleepers and Test.pptx
MDSABBIROJJAMANPAYEL
 
ML Based Model for NIDS MSc Updated Presentation.v2.pptx
ML Based Model for NIDS MSc Updated Presentation.v2.pptxML Based Model for NIDS MSc Updated Presentation.v2.pptx
ML Based Model for NIDS MSc Updated Presentation.v2.pptx
JamalHussainArman
 
CSM Cloud Service Management Presentarion
CSM Cloud Service Management PresentarionCSM Cloud Service Management Presentarion
CSM Cloud Service Management Presentarion
rpskprasana
 
2. Operations Strategy in a Global Environment.ppt
2. Operations Strategy in a Global Environment.ppt2. Operations Strategy in a Global Environment.ppt
2. Operations Strategy in a Global Environment.ppt
PuktoonEngr
 
Modelagem de um CSTR com reação endotermica.pdf
Modelagem de um CSTR com reação endotermica.pdfModelagem de um CSTR com reação endotermica.pdf
Modelagem de um CSTR com reação endotermica.pdf
camseq
 
Swimming pool mechanical components design.pptx
Swimming pool  mechanical components design.pptxSwimming pool  mechanical components design.pptx
Swimming pool mechanical components design.pptx
yokeleetan1
 
International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning an...International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning an...
gerogepatton
 
Exception Handling notes in java exception
Exception Handling notes in java exceptionException Handling notes in java exception
Exception Handling notes in java exception
Ratnakar Mikkili
 
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
IJECEIAES
 
DfMAy 2024 - key insights and contributions
DfMAy 2024 - key insights and contributionsDfMAy 2024 - key insights and contributions
DfMAy 2024 - key insights and contributions
gestioneergodomus
 

Recently uploaded (20)

6th International Conference on Machine Learning & Applications (CMLA 2024)
6th International Conference on Machine Learning & Applications (CMLA 2024)6th International Conference on Machine Learning & Applications (CMLA 2024)
6th International Conference on Machine Learning & Applications (CMLA 2024)
 
Literature Review Basics and Understanding Reference Management.pptx
Literature Review Basics and Understanding Reference Management.pptxLiterature Review Basics and Understanding Reference Management.pptx
Literature Review Basics and Understanding Reference Management.pptx
 
basic-wireline-operations-course-mahmoud-f-radwan.pdf
basic-wireline-operations-course-mahmoud-f-radwan.pdfbasic-wireline-operations-course-mahmoud-f-radwan.pdf
basic-wireline-operations-course-mahmoud-f-radwan.pdf
 
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
IEEE Aerospace and Electronic Systems Society as a Graduate Student MemberIEEE Aerospace and Electronic Systems Society as a Graduate Student Member
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
 
Wearable antenna for antenna applications
Wearable antenna for antenna applicationsWearable antenna for antenna applications
Wearable antenna for antenna applications
 
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELDEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODEL
 
132/33KV substation case study Presentation
132/33KV substation case study Presentation132/33KV substation case study Presentation
132/33KV substation case study Presentation
 
digital fundamental by Thomas L.floydl.pdf
digital fundamental by Thomas L.floydl.pdfdigital fundamental by Thomas L.floydl.pdf
digital fundamental by Thomas L.floydl.pdf
 
Embedded machine learning-based road conditions and driving behavior monitoring
Embedded machine learning-based road conditions and driving behavior monitoringEmbedded machine learning-based road conditions and driving behavior monitoring
Embedded machine learning-based road conditions and driving behavior monitoring
 
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...
 
Properties Railway Sleepers and Test.pptx
Properties Railway Sleepers and Test.pptxProperties Railway Sleepers and Test.pptx
Properties Railway Sleepers and Test.pptx
 
ML Based Model for NIDS MSc Updated Presentation.v2.pptx
ML Based Model for NIDS MSc Updated Presentation.v2.pptxML Based Model for NIDS MSc Updated Presentation.v2.pptx
ML Based Model for NIDS MSc Updated Presentation.v2.pptx
 
CSM Cloud Service Management Presentarion
CSM Cloud Service Management PresentarionCSM Cloud Service Management Presentarion
CSM Cloud Service Management Presentarion
 
2. Operations Strategy in a Global Environment.ppt
2. Operations Strategy in a Global Environment.ppt2. Operations Strategy in a Global Environment.ppt
2. Operations Strategy in a Global Environment.ppt
 
Modelagem de um CSTR com reação endotermica.pdf
Modelagem de um CSTR com reação endotermica.pdfModelagem de um CSTR com reação endotermica.pdf
Modelagem de um CSTR com reação endotermica.pdf
 
Swimming pool mechanical components design.pptx
Swimming pool  mechanical components design.pptxSwimming pool  mechanical components design.pptx
Swimming pool mechanical components design.pptx
 
International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning an...International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning an...
 
Exception Handling notes in java exception
Exception Handling notes in java exceptionException Handling notes in java exception
Exception Handling notes in java exception
 
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
 
DfMAy 2024 - key insights and contributions
DfMAy 2024 - key insights and contributionsDfMAy 2024 - key insights and contributions
DfMAy 2024 - key insights and contributions
 

Passive Air Cooling System and Solar Water Heater.ppt

  • 1. Passive Air Cooling System and Solar Water Heater with Phase Change Material for Low Energy Buildings in Hot Arid Climate Prof. Dr. Amr Abdallah
  • 2.
  • 3. Solar chimney with PCM Introduction Ventilation can be achieved inside buildings due to strong solar radiation while having large limitations in the system after sunset and at nighttime. 1 Solar chimneys are renewable energy systems that provide natural ventilation in buildings. 2 The integration of phase change material with a solar chimney is increasing worldwide. 3 Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 4. Solar chimney with solar heater Solar water heaters are one of the solar thermal application of using renewable energy, that can collect sunlight in the outdoor rooftop to heat water using a pump to circulate water. 1 Recently solar water heater has been integrated with other solar other techniques such as a solar chimney, Phase Change Material (PCM) and others. 2 Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University Introduction
  • 5. No experimental studies were found for integration passive cooling system, solar chimney and solar water heater for low energy building in a hot arid climate, Egypt. Aims Improvement of thermal performance of passive air condition with a solar chimney integrated with a solar water heater to be applied during day time and night time in a hot dry climate. Introduction To integrate three techniques based on improving solar chimney by using thermal storage to increase system performance during night time. Importance Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 6.
  • 7. Experimental set-up for solarchimney and wind tower The experiment in this study is done in two stages. The first stage is investigation and improvement of a solar chimney with Phase Change Material and MWCNTs as a separate system and integrated with solar water heated. The second stage is done to integrate improvement of a solar chimney and heating water system with full scale test house and a passive cooling tower built in Assiut University (El-Gorib site). 1 2 First Stage Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 8. The second stage is done to investigate improvement of solar chimney model to achieve night cooling with wind tower and passive cooling. Second Stage Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 9. Materials and Preparation for improvement of solar chimney Examination of Multi-Walled Carbon Nanotubes (MWCNTs) was done in Housing and Building National Research Center (HBRC), Egypt to increase absorption of solar radiation for the solar chimney integrated with PCM and increase chimney performance during nighttime. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 10. Methodology Measurement is carried out after painting aluminium plate with black painting mixed with MWCNTs without integration of PCM, and then integration of PCM. Monitoring for outdoor air temperature and air cavity temperature, surface temperature of aluminium plate, air velocity was done during beginning of hot period (April and May) of year. Integration of solar chimney will be done to full-scale test house with passive cooling wind tower after improvement of solar chimney during hot period in June and July. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 11.  It is observed that surface temperature of aluminium plate increased with PCM greater than without PCM with values equal to 77.8 C and 68 C, respectively, which agrees with previous research. Solar chimney evaluation and improvement Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 12.  Maximum solar radiation of 1089 W/m2 during middle of day (12 pm) causes a rise in chimney air temperature and airspeed with a maximum value of 62 C and 7 m/s respectively when outdoor temperature is 44 C. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University  The decrease of aluminium surface temperature gradually after sunset causes also a gradual decrease in airspeed without a sudden drop and a significant high airspeed greater than 1.5 m/s during night time that is too high than published past research without integration of PCM.
  • 13.  It is observed that temperature decreases gradually after 12 pm with a maximum temperature of around 47 C during sunset.  Then, surface temperature decreases gradually with a maximum temperature of 34.5 C during midnight compared to a temperature equal to 29.5 without integration of PCM. After the integration of PCM. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 14. Temperature and humidity evaluation inside the test house • Reduction of indoor temperature is achieved with 80% of acceptable range according to adaptive comfort standard. . The outdoor temperature decreases gradually after it passes through wet pad with a maximum temperature difference equal 8 k during day time and minimum temperature difference equal 4 k during night time. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 15. Indoor room relative humidity after cooling is within acceptable range according to past literature. Most of indoor condition after sunset and night time is very close to summer comfort zone. the psychrometric chart of the condition inside the room after cooling. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 16. Thermal Comfort Evaluation The calculation of PMV and PPD was done based on Fanger’s model. The condition is within comfort range except during middle of the day. While during night time, it is within the recommended range (0.5 < PMV<+0.5) . Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 17. 01 03 04 02 Conclusion The water heating system integrated with solar chimney achieved water temperature equal to 58 C and 40 C during 2 pm and after sunset respectively. Significant reduction for room air temperature between 8 and 4 k during day and night time respectively and improvement in building energy A significant increase for the average airflow rate in the solar chimney equal 1.5 kg/s corresponding to high solar radiation of 1089 W/m2. The new system can achieve air cooling system with fresh air and heating water Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University
  • 18. Dr. Amr Sayed Hassan Abdallah professor, Dept. of Architecture, Assiut University https://www.youtube.com/ watch?v=trxzzlCpbrk Here video for the system

Editor's Notes

  1. Photo by Green Chameleon on Unsplash
  2. Photo by Green Chameleon on Unsplash
  3. Photo by Joel Muniz on Unsplash
  4. Photo by Dylan Gillis on Unsplash
  5. Photo by Floriane Vita on Unsplash
  6. Photo by Dylan Gillis on Unsplash
  7. Photo by manny PANTOJA on Unsplash
  8. Photo by Dylan Gillis on Unsplash
  9. Photo by Floriane Vita on Unsplash
  10. Photo by Hassan OUAJBIR on Unsplash