scholarly journals Determining Position of the Evaporator in a Smart Classroom Concept Using CFD Method

2021 ◽  
Vol 4 (3) ◽  
pp. 179-184
Author(s):  
Rosyida Permatasari ◽  
Muhammad Alwan Ridhoarto ◽  
Sally Cahyati ◽  
Martinus Bambang Susetyarto
Keyword(s):  
Cfd Simulation ◽  
Temperature Limit ◽  
The South ◽  
Airflow Velocity ◽  
Ansys Fluent ◽  
The North ◽  
South Wall ◽  
Fluent Software ◽  
Cfd Method ◽  
North Wall

Various, different evaporator placements in a room have produced different airflow patterns, temperature distribution, and airflow velocities. In this study, the average room temperature and airflow velocity measured at 27 points of the CFD simulation for 4 positions of the planned evaporator placements were compared to determine the most ideal position based on the comfortable temperature and the maximum airflow velocity pursuant to the SNI 03-6572-2001 recommendation. On Position 1, two evaporators were given to the west wall. Position 2, two evaporators were placed on the south wall. On Position 3, two evaporators were given to the north wall. Moreover, on Position 4, two evaporators were placed opposite to each other where an evaporator was placed on the south wall, and the other evaporator was placed on the north wall. An ANSYS Fluent software was employed to make the CFD simulation. Based on the results of the study, it was found out that Position 2 was the most ideal evaporator placement position since it met the comfortable temperature limit and has the highest number of airflow velocity points meeting the recommended maximum airflow velocity pursuant to the SNI 03-6572-2001 recommendation.

The Villa Item and a Bride's Ordeal

1929 ◽  
Vol 19 (1) ◽  
pp. 67-87 ◽  
Author(s):  
Jocelyn Toynbee
Keyword(s):  
The South ◽  
Important Paper ◽  
The North ◽  
Dwelling House ◽  
South Wall ◽  
The Subject ◽  
The One ◽  
The Individual ◽  
North Wall ◽  
The Right

The paintings in the triclinium of the Villa Item, a dwelling-house excavated in 1909 outside the Porta Ercolanese at Pompeii, have not only often been published and discussed by foreign scholars, but they have also formed the subject of an important paper in this Journal. The artistic qualities of the paintings have been ably set forth: it has been established beyond all doubt that the subject they depict is some form of Dionysiac initiation: and, of the detailed interpretations of the first seven of the individual scenes, those originally put forward by de Petra and accepted, modified or developed by Mrs. Tillyard appear, so far as they go, to be unquestionably on the right lines. A fresh study of the Villa Item frescoes would seem, however, to be justified by the fact that the majority of previous writers have confined their attention almost entirely to the first seven scenes—the three to the east of the entrance on the north wall (fig. 3), the three on the east wall and the one to the east of the window on the south wall, to which the last figure on the east wall, the winged figure with the whip, undoubtedly belongs.

scholarly journals Effect of the ridge position ratio on the thermal environment of the Chinese solar greenhouse

2021 ◽  
Vol 8 (5) ◽  
Author(s):  
Xiaoyang Wu ◽  
Xingan Liu ◽  
Xiang Yue ◽  
Hui Xu ◽  
Tianlai Li ◽  
...  
Keyword(s):  
Structural Design ◽  
Cfd Simulation ◽  
Thermal Environment ◽  
The South ◽  
The North ◽  
Dependency Relationship ◽  
Solar Greenhouse ◽  
Computational Fluid Dynamics Cfd ◽  
North Wall ◽  
Maximum Air Temperature

This paper clarified the mechanism of the south and north roofs' effect on the thermal environment of the Chinese solar greenhouse (CSG), using a new parameter: ridge position ratio (RPR), which can describe the dynamic dependency relationship between the south and north roofs. A mathematical model was established using a method of combining computational fluid dynamics (CFD) simulation with experiments, then the model was used to further analyse the effect of RPR on the thermal environment of the CSG. The experimental greenhouse was simulated as an empty building to obtain results independently from these factors including crop and ventilation conditions. The results showed that the occurrence time of the maximum air temperature will be delayed when RPR increases to 0.3 during the daytime. As RPR increases, the heat storage layer of the soil gradually becomes thinner, but the north wall remains unchanged. RPR has a relatively small effect on the minimum temperature of each greenhouse part during the night. Mathematical models of the relationships between RPR, the solar energy that entered the greenhouse and the released heat energy of the enclosure structures were established, respectively. This paper can provide theoretical guidance for the structural design of the CSG.

An Excavation at the Church of the Blackfriars, Stirling

1996 ◽  
Vol 20 (1) ◽  
pp. 103-112 ◽  
Author(s):  
R. Page ◽  
C. Page
Keyword(s):  
Thirteenth Century ◽  
The South ◽  
The North ◽  
South Wall ◽  
Bone Fragments ◽  
North Wall ◽  
The Church ◽  
Eastern Wall

Summary Part of what was suspected to be the south wall of the Blackfriars Church, destroyed in June 1559, was revealed in 1904 during the construction of the present No 64 Murray Place in Stirling. Permission was given by the present owners of the property to excavate in the garden behind the tenement to see if further traces could be found. By following mortar deposits and stone fragments the outline of a further 13.5m of robbed out south wall, an apparently semicircular apsidal eastern wall and part of the north wall were traced. The total known length of the church is therefore 27.5m, and the internal width 6.5m, with walls 1.5m thick. The greater part of a female skeleton was found just outside the south wall, accompanied by some bones of two infants, and several hundred widely scattered bone fragments. Some pottery was also found, of various dates back to about the thirteenth century.

Hatshepsut’s Punt Reliefs: Their Structure and Function

2019 ◽  
Vol 55 ◽  
pp. 189-203
Author(s):  
Filip Taterka
Keyword(s):  
Structure And Function ◽  
The South ◽  
The West ◽  
West Wall ◽  
The North ◽  
South Wall ◽  
New Interpretation ◽  
North Wall ◽  
And Function ◽  
Female Counterpart

The article examines the layout of Hatshepsut’s Punt reliefs, proposing a new interpretation of their internal structure and ideological function within the decorative programme of the Deir el-Bahari temple. The author argues that the reliefs form a cycle of subsequent scenes, starting at the southernmost end of the west wall, continuing through the south wall up to the northern part of the west wall. As for the scenes represented on the northernmost end of the west wall and on the north wall, it is argued that they should be viewed as forming a single ideological entity, which at the same time corresponds to the long historical inscription placed on the easternmost end of the south wall. That way the reliefs reflect both aspects of Egyptian eternity: the linear (in the cycle of subsequent episodes) and the circular one (in the ideological link between the southern- and northernmost extremities of the Punt Portico). As for the function of the reliefs, it is argued that they were supposed to magically repeat Hatshepsut’s Punt expedition and thus provide her divine father Amun-Ra with all exotic products necessary in his cult. The author also tries to demonstrate, how Hatshepsut was gradually identified with the goddess Hathor in her aspect of the Lady of Punt and the female counterpart of Amun-Ra throughout the Punt reliefs.

scholarly journals X.—On the Greenstone and Associated Rocks of the Manacle Point, Lizard

1889 ◽  
Vol 6 (9) ◽  
pp. 425-427
Author(s):  
Alexander Somervail
Keyword(s):  
Good Reason ◽  
Geological Survey ◽  
The South ◽  
Main Mass ◽  
Considerable Distance ◽  
The North ◽  
North Side ◽  
South Wall

On De La Beche's Geological Survey Map of Cornwall are three colours representing the associated rocks at, and on each side of the Manacle Point. The Point itself and for a considerable distance south of it is represented as a greenstone. Partially encased in the greenstone and to the south of it is gabbro, which forms the main mass of this rock in the Lizard district. On the north side of the greenstone which forms the extreme south wall of Porthonstock Cove is hornblende-schist, which with some serpentine and other rocks terminates against the killas, or slates near Porthalla.Several observers with seeming good reason have drawn attention to the fact that the greenstone as represented on the map is made to cover much too large an area to the south, and that any one walking from this direction, or the reverse, finds gabbro where the former rock was expected to occur.

An Investigation of Methane Combustion in a Rectangular Shaped Meso Chamber

2014 ◽  
Author(s):  
Mahbub Ahmed ◽  
Cheng Zhang ◽  
Scott McKay ◽  
Vivek Shirsat ◽  
Jobaidur Khan
Keyword(s):  
Cfd Simulation ◽  
Methane Combustion ◽  
Ansys Fluent ◽  
Flamelet Model ◽  
Power Generators ◽  
Rich Condition ◽  
Higher Power ◽  
Fluent Software ◽  
Finite Volume Approach ◽  
Power Densities

Hydrocarbon-based miniature power generators are promising any many application since hydrocarbon based fuels have higher power densities compared to conventional lithium batteries. A 40mm long meso-combustor of two different configurations, two-inlet and three-inlet, were used to investigate the combustion of methane in the meso-chamber. A non-premixed combustion of methane and oxygen was simulated numerically using a steady laminar flamelet model. The mesh generation and the CFD simulation were performed using ANSYS FLUENT software. A a finite volume approach was used for the simulation. The fuel-oxidizer mixing, thermal behavior and fuel burning efficiency were studied. An adequate mixing that supports the combustion was observed in certain locations. The exhaust gas was analyzed experimentally. The temperature distributions were also observed to predict the flame locations. According to the numerical analysis it was apparent that the flame would be anchored in the well mixed regions of the chamber the flames were found to be attached in two distinct locations. One in the upstream zone and the other one in the downstream zone. Another important finding was that the fuel lean condition produced higher efficiency than the fuel rich condition.

scholarly journals Thermal Diffusion Performance of a Diffuser by various Guide Vanes configurations

2018 ◽  
Vol 225 ◽  
pp. 03018
Author(s):  
Aja O. Chikere ◽  
Hussain H. Al-Kayiem ◽  
Zainal Ambri A. Karim
Keyword(s):  
Gas Flow ◽  
Cfd Simulation ◽  
Bench Mark ◽  
Ansys Fluent ◽  
Guide Vanes ◽  
Pressure Losses ◽  
Fluent Software ◽  
Thermal Diffuser ◽  
Crosssectional Area ◽  
Large Diffusion

The use of vane-less diffuser with large diffusion angle has shown a setback in the diffusion process of high temperature working fluids. The hot gas flow was characterized as a jet-like flow. This paper presents problem, encountered practically, using a vane-less diffuser with large diffusion angle and how the problem is solved by CFD simulation. The investigated thermal diffuser has a length of 0.3 m, an inlet to outlet crosssectional area ratio of 1:25 and diffusion angle of 115.44o. To resolve the jet-like flow problem and poor distribution of the flow temperature at the diffuser outlet, the study suggested the use of guide-vanes into the diffuser. The study employed CFD simulation by ANSYS-FLUENT software to analyze the flow and thermal process in the diffuser. Three different shapes of guide vanes; block-shaped, oval-shaped and airfoil-shaped were considered in this study and at different vanes diffusion angles, as well as vane-less case, which was adopted as the bench mark case. The simulation results of the velocity, temperature and pressure at the diffuser outlet were compared for all cases. It was found that the guide vanes with symmetrical airfoil profile provided the best performance with most uniform distribution at the outlet of the diffuser. Also, the airfoil-shaped guide vanes resulted in lower pressure losses compared to the block-shaped and oval-shaped guide vanes. According to the analysis results, the diffuser was redesigned to improve the diffusion and temperature distribution across the diffuser outlet.

On the Ancient Hecatompedon which occupied the Site of the Parthenon on the Acropolis of Athens

1893 ◽  
Vol 13 ◽  
pp. 32-47
Author(s):  
F. C. Penrose
Keyword(s):  
The South ◽  
Hellenic Journal ◽  
Proper Place ◽  
The North ◽  
North Wall

Dr. Dörpfeld, as was to be expected, has published in the Mittheilungen an answer to my article in the Journal of Hellenic Studies for 1891.Excepting in two corrections of detail, of which I recognize the value, and shall have occasion to make mention in the proper place, he does not appear to me to have shaken in the slightest degree the position that I took up, namely, that the great sub-basement wall under the south flank of the Parthenon was built for a temple named the Hecatompedon anterior by many years to the time of Cimon, and that the remains of large limestone architraves frieze and cornice in the north wall of the Acropolis belonged to that temple and not to the archaic temple of Athene near the Erechtheum, the discovery of which will always be associated with Dr. Dörpfeld's name. I must assume that the readers of this article will have before them both my original paper in the Hellenic Journal, already referred to, and Dr. Dörpfeld's answer in the Mittheilungen which, so far as it affects my argument, I will endeavour to answer point by point.

Six early carved stones from South Kyme Church, Lincolnshire

1923 ◽  
Vol 3 (2) ◽  
pp. 118-121
Author(s):  
A. W. Clapham
Keyword(s):  
Present Note ◽  
The South ◽  
The North ◽  
Inside Face ◽  
The Subject ◽  
North Wall ◽  
The Church

South Kyme is a village in the Kesteven division of Lincolnshire, seven miles E.N.E. of Sleaford and eighteen miles south-east of Lincoln. The church is part of the south aisle and nave of a priory of Austin Canons founded before 1169. In the course of the erection of the modern chancel, some years ago, six carved stones were dug up on the site and were subsequently built into the structure of the north wall on the inside face of it. These stones are the subject of the present note, and the photograph and drawing made for me by Mr. P. J. Kipps give all the information to be obtained by an inspection of the stones themselves, until such time as they may be taken from the wall and their reverse sides examined.

I 10, 10-11: Casa Degli Amanti

1997 ◽  
Author(s):  
Roger Ling ◽  
Paul Arthur ◽  
Georgia Clarke ◽  
Estelle Lazer ◽  
Lesley A. Ling ◽  
...  
Keyword(s):  
The Other ◽  
Central Axis ◽  
The South ◽  
The West ◽  
The North ◽  
Small Window ◽  
South West ◽  
Dining Room ◽  
North Wall ◽  
North And South

The casa degli amanti (house of the lovers), at the south-west corner of the insula, falls into two fairly distinct halves: the atrium complex, oriented on the street to the west, and the peristyle with its surrounding rooms, oriented on the street to the south and on the property boundary to the east. In the atrium complex, the atrium is misplaced to the south of the central axis, allowing space for two large rooms to the north, one of which was possibly a shop or workshop (5.50 m. × 4.70 m.), with a separate entry from the street (I 10, 10), while the other (5.80 m. × 4.50 m.), decorated with mythological wallpaintings and provided with a wide opening on to the peristyle, must have been a dining-room or oecus (room 8). Each of these had a segmental vault rising from a height of about 3.50 m. at the spring to slightly over 4 m. at the crown. In the first the vault is missing, but the holes for some of its timbers are visible in the east wall and a groove along the north wall marks the seating for the planking attached to them; at a higher level, in the north and south walls, are the remains of beam-holes for the joists of the upper floor or attic (see below). The arrangements in room 8 are now obscured by the modern vault constructed to provide a surface for the reassembled fragments of the ceiling-paintings; but the shape of the vault is confirmed by the surviving plaster of the lunettes, while a beam-hole for the lowest of the vault-timbers is visible above the corner of the western lunette in an early photograph (Superintendency neg. C 1944). The shop I 10, 10 had a small window high in the street wall to the south of Its entrance; whether there were any additional windows above the entrance, it is impossible to say, since this part of the wall is a modern reconstruction. Room 8 was lit by a splayed window cut in the angle of the vault and the eastern lunette, opening into the upper storey of the peristyle.

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