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Preface - kmutt

Preface - kmutt

KMUTT Annual Research

KMUTT Annual Research Abstracts 2005 The 4 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2005), September 19-22, 2005, Cairo, Egypt This paper reports on field comparison of thermal performance between vinyl perforated soffit and common wood-vented soffit. Testing was conducted using two small houses of 20 m 3 volume. The soffit is 1 m wide and the total soffit surface area of each house was 16 m 2 . Four cases of perforated vinyl soffit design were studied: Full-vent, 2/3, 1/3 and 2x1/3 sections located close to the wall and to the end of eaves. The wood soffit is made of five pieces 4 cm wide spaced 1 cm each other. Experiments were performed throughout a period of four months (December-March). It was concluded that the average attic temperature calculated using attic and eave temperatures of perforated soffit were very close to common wood-vented soffit. An additional advantage of vinyl perforated soffit is its light color that can help illuminating the exterior surface area of walls of the house at night. Finally, it is expected that vinyl perforated soffit will quickly be integrated in the new design of modern houses due to its esthetic, lightweight, and water resistance property. IC-348 AN EXPERIMENTAL STUDY OF FREE CONVECTION IN AN INCLINED RECTANGULAR CHANNEL OPEN ENDED USING RADIANT BARRIER Withaya Puangsombut, Jongjit Hirunlabh, Joseph Khedari, Belkacem Zeghmati The 4 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2005), September 19-22, 2005, Cairo, Egypt This paper presents investigation on free convection heat transfer within an inclined rectangular channel at various aspect ratios. The upper plate was heated by a constant heat flux while the lower plate was made by radiant barrier. The channel width and length were 0.7 and 1.5 m respectively. Tests were made for different aspect ratio (air gap to channel length) by varying air gap space (S = 3, 5, 7, 9 and 11 cm) and constant heat fluxes (190.5, 285.7, 380.9 and 476.2 W/m 2 ). The tilt angle was fixed at 15°. Temperature distributions within the rectangular channel and induced airflow rate are 199 presented and discussed. Expression to calculate Nusselt and Rayleigh are also reported. Heat transfer enhancement due to the radiant barrier was assessed by comparison to a channel equipped with gypsum board. IC-349 PERFORMANCE OF THE NATURAL VENTILATION OF A HOUSE BY GLAZED SOLAR CHIMNEY WALL UNDER THE CLIMATIC CONDITIONS OF THAILAND Preeda Chantawong, Yothin Ungkoon, Jongjit Hirunlabh, Belkacem Zeghmati, Joseph Khedari, Sombat Teekasap, Maung Maung Win, Pichai Namprakai, Panya Yodovard International Conference on Recent Advances in Mechanical and Materials Engineering (ICRAMME 2005), May 30-31, 2005, Kuala Lumpur, Malaysia, pp. 493-499 This paper presents a numerical modeling to simulate the performance of the natural ventilation of houses by using glazed solar chimney walls (GSCW) under the climatic conditions of Thailand. The GSCW consists of double glass with an air layer and openings located at the bottom (room side) and the top (ambient side). The dimensions of the experiment set up are as follows: 0.74 m high, 0.50 m width and 0.10 m air gap. The size of openings was 0.05x0.5m. The GSCW was fixed on the southern wall of a small room of 2.8 m 3 while another room unit served as a reference. It was found that GSCW could induce significant ventilation as indoor air velocity of about 0.07- 0.14 m/s was observed and the room temperature was less than that of the reference room with a closed window. The induced airflow rate is about 0.05-0.28 m 3 /s. Comparisons between experimental and numerical model, result showed a good accord, therefore, the developed numerical model is valid. Consequently GSCW can be used effectively to reduce heat transferred through windows and glazed walls into the habitation. Finally, new configurations of the GSCW were proposed for the design of such a system under different ambient conditions, orientations and material models. IC-350 HEAT AND MASS TRANSFER OF COCONUT COIR PAD IN EVAPORATIVE COOLING SYSTEM Ratanakorn Rawangkul, Jongjit Hirunlabh, International Conference

200 Joseph Khedari, Belkacem Zeghmati, Lucien Elegant The 4 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2005), September 19-22, 2005, Cairo, Egypt This paper was aimed to investigate the performance of the use Coconut coir (Cocos nucifera) as absorbent pad for evaporative cooling system. The main advantage is the reduction of investment cost of media pad since coconut coir is agricultural waste. Small coconut coir pads were fabricated and tested using a labscale experimental set up then comparised with commercials rigid media pads. The effects of the heat and mass transfer coefficients, air velocity, and static pressure drop across pad on evaporative cooling efficiency were examined. Results show that under air velocity ranged from 1.3 to 5.4 m/s and water flow rate 80 ml/min, the heat and mass transfer coefficients varied from 26.61 to 153.96 W/m 2 o C and 0.06 to 0.37 m/s, and 42.46 to 122.53 W/m 2 o C and 0.07 to 0.15 m/s, for coconut coir and paper pad, respectively. The pressure drop varied from 1 to 11 Pa, and 4 to 13 Pa for coconut coir and paper pad, respectively. The cooling efficiency varied from 35 to 50 % and 64 to 71% for coconut coir and paper pad, respectively. It could be conducted that the proposed application of coconut coir use as evaporative cooling pad is extremely interesting. Improving the cooling efficiency could be accomplished by modifying the configuration of coconut coir pad. IC-351 DESIGN OPTIMIZATION OF A NEW HOT HEAT SINK OF A RECTANGULAR FINS ARRAY FOR THERMOELECTRIC DEHUMIDIFIERS Chanwit Udomsakdigool, Jongjit Hirunlabh, Joseph Khedari, Belkacem Zeghmati The 4 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT 2005), September 19-22, 2005, Cairo, Egypt The objective of this research work was aimed at conducting experimental investigation of the heat sink performance of a new rectangular fins array designed by our team. Various operating conditions were considered namely the distance between the fan and the fins, varied from 0 cm to 4 cm, heat supplied to KMUTT Annual Research Abstracts 2005 the sink and the fan voltage. It was concluded that a fan installed at 3 cm height from the fins is recommended as the hot side temperature was the lowest. An experimental prototype of a thermoelectric dehumidifier was then constructed and tested. Preliminary tests confirmed the good performance of the hot heat sink design for the intended thermoelectric application. IC-352 A PRELIMINARY STUDY OF HYGROTHERMAL PERFORMANCE OF AUTOCLAVED AERATED CONCRETE BLOCKS UNDER HOT HUMID CLIMATE OF THAILAND Yothin Ungkoon, Jongjit Hirunlabh, Joseph Khedari, U-Cheul Chin, Panya Yodovard The 1 st International Conference Passive and Low Energy Cooling for the Built Environment, May 19-21, 2005, Santorini, Greece, pp. 493- 499 This paper reports field investigation of the hy-grothermal performance of autoclaved aerated concrete blocks (ACC) compared to other wall construction materials. The study was conducted under the tropical climatic conditions of Thailand where this debatable issue had not been yet seriously investigated. To this end, three small houses were built. The dimensions of each were 2.4 m x 2.4 m x 2.3 m. Every house was built using a different commercial material namely red clay brick, AAC block and lightweight concrete (LC) block with a plastering layer and no painting in both internal and external sides. The well insulated roof was built with grey colored concrete tiles and gypsum ceiling. The inclination of the roof was 30° to the horizontal plane. Tests were conducted with closed windows and doors. The effect of ambient humidity was simulated by using sprinkles spraying water at the four sides of each house. Experimental observation demonstrated that measured temperatures and humidity profiles were different among three sample houses. The red-brick wall had the highest temperature difference compared to the AAC and LC walls. The inter-penetrated moisture's level existing inside each room was insignificant during normal weather condition. However, tests under high humid condition indicated good moisture prevention was observed at the AAC house. Within the AAC wall, the heat gain reduction into building is International Conference

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    CONTENTS Page Preface International

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    National Journals

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    54 นอยกวาแบบต

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    56 (Least Square Matching Method)

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    58 อุณหภูมิ 30 แ

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    60 สเปกตรัม จา

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    62 ขอมูลดานทร

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    64 22.8 มาตรฐานเป

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    66 2545 NJ-033 EFFECTS OF ELEVATED

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    68 เปลือกที่ม

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    70 ของการดูดซ

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    72 การสกัดดวย

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    74 collection of authentic texts th

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    76 รอยละ 32 มีสา

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  • Page 214: National Conferences
  • Page 217 and 218: 210 จอมเทียนปา
  • Page 219 and 220: 212 การสกัดสาร
  • Page 221 and 222: 214 ไดแก อุณหภู
  • Page 223 and 224: 216 โดยกลไกของ
  • Page 225 and 226: 218 เคลือบเมื่
  • Page 227 and 228: 220 สําเริง จัก
  • Page 229 and 230: 222 ลดเวลาตลอด
  • Page 231 and 232: 224 อุณหภูมิสู
  • Page 233 and 234: 226 NC-043 การวิเคร
  • Page 235 and 236: 228 เกิดพฤติกร
  • Page 237 and 238: 230 เดียว เพื่อ
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  • Page 245 and 246: 238 บทความนี้น
  • Page 247 and 248: 240 นําเอาเวคเ
  • Page 249 and 250: 242 งานวิจัยนี
  • Page 251 and 252: 244 การอบแหงลด
  • Page 253 and 254: 246 แยกเฟสต่ํา
  • Page 255 and 256: 248 กลบ โดยเปรี
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    250 นํามาใช คือ

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    252 วิเคราะหหา

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    254 NC-123 การวิเคร

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    256 NC-129 เครื่องผ

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    258 สามารถขยาย

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    260 ครั้งที่ 43, 1-

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    262 calculated with the use of the

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    264 Version 1.3.1 และ Softwar

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    266 ขนไกได จากก

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    268 โครงสรางขอ

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    270 การปลูกพืช

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    272 ระดับพึงพอ

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    274 ของแกสโซฮอ

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    276 1) สภาพทั่วไ

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    278 อนุปริญญา แ

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    280 อาชีวศึกษา

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    282 กระทบตอคุณ

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    284 ตั้งกลไกแข

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    286 นุชจรินทร เ

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    288 โดยรวมผูบร

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    290 แนนกระแสไฟ

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    292 NC-222 ผลงานตีพ

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    294 NC-227 เตาเผาไห

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    296 จําเพาะรวม

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    298 NC-238 จลนพลศาส

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    300 ทนงเกียรติ

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    302 ดีเซลนั้นม

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    304 NC-254 การใชเทค

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    306 อาคารศูนยก

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    308 กระบวนการร

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    310 บรรยากาศขอ

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    312 metal ions on 2-AP biosyntheis

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    314 total clones while the ethanol

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    316 การประชุมท

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    318 BioThailand (The 16 th Annual M

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    320 สูงที่สุดพ

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    322 นัยสําคัญท

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    324 ความเขมขนร

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    326 ปลูกแบบพรา

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    328 นี้ทําใหทร

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    330 ดุลชาติ มาน

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    332 ไมโครเมตร ส

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    334 In this study, we collected seq

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    336 กนกรัตน นาค

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    338 การพัฒนาสื

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    340 one of the causes of difficulty

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    342 ทวีรัตน วิจ

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    344 program, Cytoscape. This model

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    346 production demand. Nevertheless

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    348 อุลตราไวโอ

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    350 นี้อยูในชว

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    352 เพื่อนําสว

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    354 trichloroacetic acid (TCA) ม

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    356 ทรัพยากรที

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    358 ในประเทศสห

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    360 8-9 ธันวาคม 2548,

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    362 ซึ่งเกิดขอ

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    364 NC-391 การวิเคร

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    366 การประชุมว

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    368 2547) พบวามหาว

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    370 กนกพร ลีลาเ

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    Authors Index

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    376 จงจิตร หิรั

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    378 ธ ธนธร ทองส

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    380 พยุงศักดิ์

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    382 วรรณพ วิเศษ

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    384 สุดารัตน จิ

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    386 อุลาวัณย กุ

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    388 138, 141, 142 Jarunya Narangaja

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    390 Panida Kongsawadworakul 191 Pan

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    392 Sorakrich Maneewan 124, 136 Sor

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    394 KMUTT Annual Research Abstracts

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