buletinul institutului politehnic din iaşi - Universitatea Tehnică ...

More documents

Recommendations

Info

10 Antonino La Rocca et al. The mean single regasification capacity in the regasification sites planned in the World is 8 × 10 9 Stm 3 /y. The modular regasification facility reported in Fig. 2 has a regasification capacity of 2 × 10 9 Stm 3 /y and it has a potential capacity to delivery cold power, recovered for cold utilization, of more than 50MWand can produce 3 MW of electric power. The power required by the cluster including Agro Food Factories amounts to 9 MW of cold. The duty can be satisfied by the use of cold delivered in the exchanger CU1. The end use in the Hypermarket pertains mainly to the process of space air conditioning and a quantity of cold is required in the refrigeration utilities. The whole amount of power required is of 6 MW of which 100 kW delivered as cold at -35 °C and the remaining part delivered as cold at -10 °C. The whole duty can be satisfied by the use of cold delivered in the Kettle evaporators KE2. The remaining cold recovered can be used inside the regasification site for a lot of other processes which requires cold. 3.2. The Transfer of Cold Between the Regasification Facility and the End Users This phase of the research activity at Dipartimento dell’Energia of Palermo University required a thorough analysis of a lot of options. The transfer of cold between the regasification facility and the clusters of Agro Food Factories and the Hypermarket takes place by means of two pipelines into which travels Carbon Dioxide: in the feeding pipeline it is in liquid phase and in the return pipeline it is in gaseous phase. Carbon Dioxide is liquefied in the regasification facility recovering cold available in the regasification process (Fig.2, Units: CU1 and KE2) and it is pumped in liquid phase. The selected option allows a considerable saving of pumping power (e.g.: it results for the Case Study of the Agro Food Factories that for the gaseous phase it would be more than 30 time higher). Carbon Dioxide in liquid phase goes to the clusters of users in each factory and feeds evaporators of cold utilities while the gaseous phase returns back to the regasification facility where it is liquefied and then pumped in the feeding pipeline. 3.3. Agro Food Factories A process sheet of the condensation facility and of the liquid Carbon Dioxide pumping station lying in the regasification site is reported in Fig. 4 (exchanger CU1, receiver A and Carbon Dioxide Liquid Pump). In the same Figure it is reported a schematic sheet indicating some clusters of end users (CLi), the storage system (Bi) of the liquid Carbon Dioxide installed ahead of the end users in a Factory. The gaseous phase returning from the evaporators comes in the receiver (Ci). From this device installed in each Factory it goes (almost dry) in a common receiver (C, installed in the cluster area) and then it
Bul. Inst. Polit. Iaşi, t. LVIII (LXII), f. 4, 2012 11 goes in the return pipeline collecting all the gaseous Carbon Dioxide returning from the whole cluster of Factories. Fig. 6 represents the process which takes place in the secondary line (which includes the Carbon Dioxide pipeline) on the p-h diagram. The line 1-2 indicates the condensation process of the gaseous phase which returns from the Agro Food Factories. The evaporation process takes place in the evaporators (at the end user, line 5-6). The pumping of the liquid phase is indicated by the line 2-3 and line 3-4 indicates the pressure losses along the path in which the liquid phase travels. Line 4-5 indicates, for sake of simplicity, the whole adiabatic throttling process which takes place in all evaporators. For sake of simplicity pressure losses are not represented on the diagrams, but these were duly taken into account in the study. The line 6-1 indicates the process which pertains to the pressure losses during the return of the gaseous phase. The pipeline ahead of the end uses has a mean diameter of 8 inch (thickness 8.18 mm, pressure rating 40 bar, seamless steel API 5L). The pipeline downstream of the end uses (return pipeline) has a mean diameter of 18 inch (thickness 11.13 mm, pressure rating 40 bar, seamless steel API 5L). The insulation material is polyurethane foam, which has high thermal efficiency and is mechanically strong. The system is capable of working in a temperature range of -200 °C to 150 °C. The condensation and pumping facility (in the regasification site) and the facility lying in the cluster will be monitored on-line by means of a master PC (cluster controller) which receives signals by the data acquisition and control peripherals (remote units, at the end uses). The main task of the supervision system will be to assure the right feeding of the evaporators at the end use. 3.4. Hypermarket Fig. 5 shows a process sheet of the condensation facility and of the liquid Carbon Dioxide pumping station lying in the regasification site (exchanger KE2, receiver A’ and Carbon Dioxide Liquid Pump). In the same Figure it is reported a schematic sheet of some end users, the storage system (B’) of the liquid Carbon Dioxide installed ahead of the end users. In the receiver (C’) comes the gaseous phase returning from the evaporators; from this device it goes (almost dry) in the return pipeline. In Fig. 7 it represents the process which takes place in the secondary line (which includes the Carbon Dioxide pipeline) on the p-h diagram. The processes represented both for the end use at -35 °C and for the end use at -15 °C, are similar to those explained for Fig. 4. Note that here there is need to equip the facility with a compressor (see Fig. 5) which pumps the gaseous phase coming out from the evaporators working at a lower temperature up to a pressure level suitable for mixing the gaseous phase with that coming out from the Air Treatment Units in the Hypermarket. The pipeline lying ahead of the end uses has a mean diameter of 6
Page 1: BULETINUL INSTITUTULUI POLITEHNIC D
Page 5 and 6: BULETINUL INSTITUTULUI POLITEHNIC D
Page 7: VICTOR COTOROS şi EMIL BUDESCU, As
Page 10 and 11: ALEXANDRU RADU, CONSTANTIN PANĂ an
Page 15 and 16: Bul. Inst. Polit. Iaşi, t. LVIII (
Page 21: 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 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 78 and 79:
66 Ionel Ivancu et al. the second s
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 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
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 113 and 114:
BULETINUL INSTITUTULUI POLITEHNIC D
Page 115 and 116:
Bul. Inst. Polit. Iaşi, t. LVIII (
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127:
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 ...

Create successful ePaper yourself

Delete template?

Save as template?