buletinul institutului politehnic din iaşi - Universitatea Tehnică ...

More documents

Recommendations

Info

66 Ionel Ivancu et al. the second stage consists in the experimental analysis of the heat exchanger. The main objective of the study is the mutual validation of both analysis methods, theoretical and experimental. The paper presents the results obtained in the first stage of the study. 2. The Experimental Heat Exchanger In order to set out the geometry of the plate heat exchanger, the information from (Jorge et al., 2004) was used. Two pictures of the heat exchanger are shown in Fig.1a and Fig.1b. The exchanger size is 300 x 300 mm, with a number of 18 channels for air flow and 17 channels for flue gas flow. The distance between plates is 5 mm. The clamping of the plates is realized with threaded rods. The plates were made of galvanized steel. a b Fig. 1 – The experimental plate heat exchanger. In order to develop the experimental study, an experimental stand was conceived and developed. The experimental study is not the subject of the present paper and will be accomplished in the next stage of the research. 3. Modelling of Heat Transfer The CAD modelling of both the separating wall and flow channel was made with CATIA V5 R19 software. Helpful information in this sense comes from (Haghshenas et al., 2011), (Gut & Pinto, 2003), (Gut et al., 2004), (Galeazzo et al., 2011). In order to achieve the temperature distribution in the separating wall of the exchanger, the Steady-Thermal module of ANSYS v13 was used. To achieve the transfer, forced convective conditions were imposed for walls in contact with fluids. For the separating wall there were used hexahedron finite elements. The mesh was composed of 2548 of elements with 19088 nodes. For the modelling of the air flow channel, tetrahedral finite elements were used. The mesh was composed of 28579 elements with 9136 nodes. The mesh for the model is presented in Fig. 2.
Bul. Inst. Polit. Iaşi, t. LVIII (LXII), f. 4, 2012 67 The input data required by heat exchanger model are: the pressure – p1 [N/m 2 ], the velocity – c1 [m/s] and the temperature – t1 [°C] of the fluid in the inlet section of the channel. The parameters have the following values: p1 = 101378 N/m 2 , c1 = 1.025 m/s, t1 = 18 °C. Fig. 2 –The mesh for the air flow channel. The air pressure drop Δp was considered constant and was measured on the experimental stand. In order to obtain the temperature on the inner surface of the air flow channel was necessary to accomplish the temperatures distribution in the separating wall. Fig. 3 –Distribution of temperature in the separating wall. The forced convective heat transfer from flue gas to air takes place in laminar conditions, over a plane plate. Proper calculation methods for this case are presented in (Popescu, 2003), (Badea & Necula, 2000), (Leca et al., 1998).
Page 1:
BULETINUL INSTITUTULUI POLITEHNIC D
Page 5 and 6:
Page 7:
VICTOR COTOROS şi EMIL BUDESCU, As
Page 10 and 11:
ALEXANDRU RADU, CONSTANTIN PANĂ an
Page 13 and 14:
Page 15 and 16:
Bul. Inst. Polit. Iaşi, t. LVIII (
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28: Bul. Inst. Polit. Iaşi, t. LVIII (
Page 39: Bul. Inst. Polit. Iaşi, t. LVIII (
Page 42 and 43: 30 Daniel Dragomir-Stanciu and Mari
Page 44 and 45: 32 Daniel Dragomir-Stanciu and Mari
Page 47 and 48: BULETINUL INSTITUTULUI POLITEHNIC D
Page 64 and 65: 52 Ionel Oprea and low viscosity ar
Page 66 and 67: 54 Ionel Oprea COP PT Puterea speci
Page 68 and 69: 56 Ionel Oprea 8. GWP - global warm
Page 70 and 71: 58 Ionel Oprea suplimentari, cum ar
Page 72 and 73: 60 Răzvan Florin Barzic et al. Cur
Page 74 and 75: 62 Răzvan Florin Barzic et al. 3-
Page 76 and 77: 64 Răzvan Florin Barzic et al. 3.
Page 80 and 81: 68 Ionel Ivancu et al. a b Fig. 4 -
Page 82 and 83: 70 Ionel Ivancu et al. Gut J.A.W.,
Page 84 and 85: 72 Ion Zabet and Graţiela-Maria Ţ
Page 94 and 95: 82 Victor Pantilie et al. many rese
Page 96 and 97: 84 Victor Pantilie et al. industria
Page 98 and 99: 86 Victor Pantilie et al. Another i
Page 100 and 101: 88 Victor Pantilie et al. At the en
Page 102 and 103: 90 Victor Pantilie et al. Tang X.,
Page 104 and 105: 92 Alexandru Radu et al. Furthermor
Page 106 and 107: 94 Alexandru Radu et al. Spark timi
Page 108 and 109: 96 Alexandru Radu et al. Fig. 3 - B
Page 110 and 111: 98 Alexandru Radu et al. 4. The bes
Page 130 and 131:
118 Eugen Rusu et al. in PM emissio
Page 132 and 133:
120 Eugen Rusu et al. also be used
Page 134 and 135:
122 Eugen Rusu et al. Fig. 3 - Maxi
Page 136 and 137:
124 Eugen Rusu et al. Fig. 6 - HC e
Page 138 and 139:
126 Eugen Rusu et al. Pe lângă ce
Page 140 and 141:
128 Adrian Sabău et al. arguments
Page 142 and 143:
130 Adrian Sabău et al. The energy
Page 144 and 145:
132 Adrian Sabău et al. during fue
Page 146 and 147:
134 Adrian Sabău et al. 11 T ⎛ 0
Page 148 and 149:
136 Adrian Sabău et al. No experim
Page 150 and 151:
138 Adrian Sabău et al. calculated
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163:
Page 166 and 167:
154 Marius Receanu et al. where: qr
Page 168 and 169:
156 Marius Receanu et al. In Fig. 2
Page 170 and 171:
158 Marius Receanu et al. the ambie
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181:
Page 184 and 185:
172 Mariana Lupchian Propulsion eng
Page 186 and 187:
174 Mariana Lupchian Fig. 1 - The p
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197:
Page 200 and 201:
188 Costică Atanasiu et al. comput
Page 202 and 203:
190 Costică Atanasiu et al. γ= ε
Page 204 and 205:
192 Costică Atanasiu et al. The sa
Page 206 and 207:
194 Costică Atanasiu et al. Fig. 1
Page 208 and 209:
196 Costică Atanasiu et al. elasti
Page 210 and 211:
198 Ovidiu Niţă et al. rejection
Page 212 and 213:
200 Ovidiu Niţă et al. aluminium
Page 214 and 215:
202 Ovidiu Niţă et al. a b Fig. 5
Page 216 and 217:
204 Ovidiu Niţă et al. căreia ac
Page 218 and 219:
206 Ovidiu Niţă and Vasile Braha
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
214 Marian Teodor Popescu et al. 2.
Page 228 and 229:
216 Marian Teodor Popescu et al. Sp
Page 230 and 231:
218 Marian Teodor Popescu et al. Th
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239:
Page 242 and 243:
230 Victor Cotoros and Emil Budescu
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Page 273 and 274:
Page 275 and 276:
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Page 287 and 288:
Page 289 and 290:
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Page 297 and 298:
PC Cell calibration Bul. Inst. Poli
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317:
show all

buletinul institutului politehnic din iaşi - Universitatea Tehnică ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?