Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage

In this work, a test room was built in Baghdad city, with (2*1.5*1.5) m3 in dimensions, while the solar chimneys (SC) were designed with aspect ratio (ar) bigger than 12. Test room was supplied by many solar collectors; vertical single side of air pass with ar equals 25, and tilted 45o...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Talib K. Murtadha, Hussien M. Salih, Ali D. Salman
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Solar chimney phase change material evacuated tubular collector copper foam matrix Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/ec680c9f71ed41d1b032ee70ddaa8f94
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:ec680c9f71ed41d1b032ee70ddaa8f94
record_format	dspace
spelling	oai:doaj.org-article:ec680c9f71ed41d1b032ee70ddaa8f942021-12-02T05:27:12ZExperimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage1818-11712312-0789https://doaj.org/article/ec680c9f71ed41d1b032ee70ddaa8f942017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/311https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 In this work, a test room was built in Baghdad city, with (21.51.5) m3 in dimensions, while the solar chimneys (SC) were designed with aspect ratio (ar) bigger than 12. Test room was supplied by many solar collectors; vertical single side of air pass with ar equals 25, and tilted 45o double side of air passes with ar equals 50 for each pass, both collectors consist of flat thermal energy storage box collector (TESB) that covered by transparent clear acrylic sheet, third type of collector is array of evacuated tubular collectors with thermosyphon in 45o instelled in the bottom of TESB of vertical SC. The TESB was made from metallic iron sheets as a shell and fuelled by paraffin wax as phase change material (PCM). The PCM supported by copper foam matrix (CFM) to enhance thermal conductivity of wax. When heat is released from TESB to the air, a buoyancy force will be generated in chimney gaps. Then a difference in pressure between inside and outside test room leads to induce the air flow to test room through wet corrugated cellulose pad, where evaporative cooling (EC) occurs. Results of experimental work, that achieved in June, for 12 to24 hour in the test day, refer to effectiveness using EC to decrease the room temperature comparing. The system reduces test room temperature of up to 8.5~9.2 oC in 11:00 am to 3:00 pm and at highest effectiveness of EC, while minimum reduces in temperature of up to 3.5 oC in 8:00pm to 3:00 am. Also, the results showed the affectivity to using the TESB, during the night time for ventilation and EC, with lower effectiveness than from day time. The range of EC effectiveness equals 30.5-37.5 with a natural vent, while The maximum air change per hour (ACH) equals (3.8-6.187), and the maximum mass flow rate is equal to (36.651 kg.hr-1) at experimental evaluation of the system’s discharge coefficient value 0.371. Talib K. MurtadhaHussien M. SalihAli D. SalmanAl-Khwarizmi College of Engineering – University of BaghdadarticleSolar chimneyphase change materialevacuated tubular collectorcopper foam matrixChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 12, Iss 3 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Solar chimney phase change material evacuated tubular collector copper foam matrix Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Solar chimney phase change material evacuated tubular collector copper foam matrix Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Talib K. Murtadha Hussien M. Salih Ali D. Salman Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
description	In this work, a test room was built in Baghdad city, with (21.51.5) m3 in dimensions, while the solar chimneys (SC) were designed with aspect ratio (ar) bigger than 12. Test room was supplied by many solar collectors; vertical single side of air pass with ar equals 25, and tilted 45o double side of air passes with ar equals 50 for each pass, both collectors consist of flat thermal energy storage box collector (TESB) that covered by transparent clear acrylic sheet, third type of collector is array of evacuated tubular collectors with thermosyphon in 45o instelled in the bottom of TESB of vertical SC. The TESB was made from metallic iron sheets as a shell and fuelled by paraffin wax as phase change material (PCM). The PCM supported by copper foam matrix (CFM) to enhance thermal conductivity of wax. When heat is released from TESB to the air, a buoyancy force will be generated in chimney gaps. Then a difference in pressure between inside and outside test room leads to induce the air flow to test room through wet corrugated cellulose pad, where evaporative cooling (EC) occurs. Results of experimental work, that achieved in June, for 12 to24 hour in the test day, refer to effectiveness using EC to decrease the room temperature comparing. The system reduces test room temperature of up to 8.5~9.2 oC in 11:00 am to 3:00 pm and at highest effectiveness of EC, while minimum reduces in temperature of up to 3.5 oC in 8:00pm to 3:00 am. Also, the results showed the affectivity to using the TESB, during the night time for ventilation and EC, with lower effectiveness than from day time. The range of EC effectiveness equals 30.5-37.5 with a natural vent, while The maximum air change per hour (ACH) equals (3.8-6.187), and the maximum mass flow rate is equal to (36.651 kg.hr-1) at experimental evaluation of the system’s discharge coefficient value 0.371.
format	article
author	Talib K. Murtadha Hussien M. Salih Ali D. Salman
author_facet	Talib K. Murtadha Hussien M. Salih Ali D. Salman
author_sort	Talib K. Murtadha
title	Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
title_short	Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
title_full	Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
title_fullStr	Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
title_full_unstemmed	Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage
title_sort	experimental study using the passive solar chimney for evaporative cooling with pcm and cfm as a thermal energy storage
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/ec680c9f71ed41d1b032ee70ddaa8f94
work_keys_str_mv	AT talibkmurtadha experimentalstudyusingthepassivesolarchimneyforevaporativecoolingwithpcmandcfmasathermalenergystorage AT hussienmsalih experimentalstudyusingthepassivesolarchimneyforevaporativecoolingwithpcmandcfmasathermalenergystorage AT alidsalman experimentalstudyusingthepassivesolarchimneyforevaporativecoolingwithpcmandcfmasathermalenergystorage
_version_	1718400446332141568

Experimental Study Using the Passive Solar Chimney for Evaporative Cooling With PCM and CFM as a Thermal Energy Storage

Ejemplares similares