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P-h diagram of R744 (CO

)

11.3 Propriétés thermodynamiques du CO

Relation entre Pression et Température d’évaporation

Densité

Enthalpie

Entropie

Point

Temperature

Pression relative

Pression absolue Liquide

Vapeur

Liquide

Vapeur

Liquide

Vapeur

(C)

(MpaG)

(MPa)

(kg/m^3)

(kJ/kg)

(kJ/kg-K)

(kJ/kg-K

-35

1,1

1,2024

1096,4

31,216

123,05

436,23

0,70794

2,023

-34

1,1

1,2452

1092,4

32,326

125,1

436,37

0,71634

2,018

-33

1,2

1,2891

1088,3

33,469

127,15

436,51

0,72474

2,0129

-32

1,2

1,3342

1084,1

34,644

129,2

436,62

0,73311

2,0079

-31

1,3

1,3804

1079,9

35,854

131,27

436,73

0,74148

2,0029

-30

1,3

1,4278

1075,7

37,098

133,34

436,82

0,74982

1,998

-29

1,4

1,4763

1071,5

38,378

135,41

436,9

0,75816

1,993

-28

1,4

1,5261

1067,2

39,696

137,5

436,96

0,76649

1,988

-27

1,5

1,577

1062,9

41,051

139,59

437,01

0,77481

1,9831

-26

1,5

1,6293

1058,6

42,445

141,69

437,04

0,78311

1,9781

-25

1,6

1,6827

1054,2

43,88

143,79

437,06

0,79141

1,9732

-24

1,6

1,7375

1049,8

45,356

145,91

437,06

0,79971

1,9683

-23

1,7

1,7935

1045,3

46,875

148,03

437,04

0,80799

1,9633

-22

1,8

1,8509

1040,8

48,437

150,16

437,01

0,81627

1,9584

-21

1,8

1,9096

1036,3

50,045

152,3

436,96

0,82455

1,9535

-20

1,9

1,9696

1031,7

51,7

154,45

436,89

0,83283

1,9485

-19

1,9

2,031

1027

53,402

156,61

436,81

0,8411

1,9436

-18

2,0

2,0938

1022,3

55,155

158,77

436,7

0,84937

1,9386

-17

2,1

2,1581

1017,6

56,959

160,95

436,58

0,85765

1,9337

-16

2,1

2,2237

1012,8

58,816

163,14

436,44

0,86593

1,9287

-15

2,2

2,2908

1008

60,728

165,34

436,27

0,87421

1,9237

-14

2,3

2,3593

1003,1

62,697

167,55

436,09

0,88249

1,9187

-13

2,3

2,4294

998,14

64,725

169,78

435,89

0,89078

1,9137

-12

2,4

2,501

993,13

66,814

172,01

435,66

0,89908

1,9086

-11

2,5

2,574

988,06

68,967

174,26

435,41

0,90739

1,9036

-10

2,5

2,6487

982,93

71,185

176,52

435,14

0,91571

1,8985

-9

2,6

2,7249

977,73

73,471

178,8

434,84

0,92405

1,8934

-8

2,7

2,8027

972,46

75,829

181,09

434,51

0,9324

1,8882

-7

2,8

2,8821

967,12

78,261

183,39

434,17

0,94076

1,883

-6

2,9

2,9632

961,7

80,77

185,71

433,79

0,94915

1,8778

-5

2,9

3,0459

956,21

83,359

188,05

433,38

0,95756

1,8725

-4

3,0

3,1303

950,63

86,032

190,4

432,95

0,96599

1,8672

-3

3,1

3,2164

944,97

88,794

192,77

432,48

0,97444

1,8618

-2

3,2

3,3042

939,22

91,647

195,16

431,99

0,98293

1,8563

-1

3,3

3,3938

933,38

94,596

197,57

431,46

0,99145

1,8509

3,4

3,4851

927,43

97,647

200

430,89

1,8453

3,5

3,5783

921,38

100,8

202,45

430,29

1,0086

1,8397

3,6

3,6733

915,23

104,07

204,93

429,65

1,0172

1,834

3,7

3,7701

908,95

107,46

207,43

428,97

1,0259

1,8282

3,8

3,8688

902,56

110,98

209,95

428,25

1,0346

1,8223

3,9

3,9695

896,03

114,62

212,5

427,48

1,0434

1,8163

4,0

4,072

889,36

118,41

215,08

426,67

1,0523

1,8102

4,1

4,1765

882,55

122,34

217,69

425,81

1,0612

1,8041

4,2

4,2831

875,58

126,44

220,34

424,89

1,0702

1,7977

4,3

4,3916

868,44

130,71

223,01

423,92

1,0792

1,7913

4,4

4,5022

861,12

135,16

225,73

422,88

1,0884

1,7847

11.4. CO

properties

Pressure as function of evaporating temperature

Содержание Vendo CDU-L R06A2B

Страница 1: ...Delivering CO2 solutions in commercial refrigeration SANDEN CO2 RETAIL SOLUTIONS CDU L R06A2B 3 Phases 400V installation guide 1...

Страница 2: ...ifications 2 Product diagram 3 Operation diagram 4 Installation instruction 5 Handling 6 Piping connection 7 Power supply connection 8 External ON OFF control signal 9 Piping and vacuuming 10 CO charg...

Страница 3: ...Modifiez le style du titre 1 Product specifications CDU L 3...

Страница 4: ...Modifiez le style du titre 2 Product diagram CDU L 4...

Страница 5: ...3 1 Operation diagram MT loop A B 5 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 5 1 2 3 4 Loop A Loop B Loop C OFF MT A B Te 5 Tambient 10 Loop A CLA Loop B CLB Loop C CHC 5 1 2 3 4 Loop A Loop B MT A B Te 5 Tamb...

Страница 6: ...Modifiez le style du titre 6 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Loop A Loop B Loop C LT A B Te 30 Tambient 25 Loop A CLA Loop B CLB Loop C CHC 3 2 Operation diagram LT loop A B...

Страница 7: ...B 6 7 8 9 10 Loop A LT Teva 30 Loop B MT Teva 5 Loop C High stage compressor Ambient Temperature 25 1A 2A 3A 4A 5A 1B 2B 3B 4B 5B 6 7 8 9 10 Loop A Loop B Loop C LT loop A MT loop B Loop A CLA Loop B...

Страница 8: ...ication Only a single evaporator is installed per cooling loop the distance should not exceed 20m meaning 40m maximum piping supply and return Installation beyond this distance results in a lack of co...

Страница 9: ...0 mm of free space on the left and right hand side and the front and back 9 1 Installation conditions Provide space above the equipment to allow it to be opened access for maintenance reparation opera...

Страница 10: ...nit 5 The air outlet must not be directed towards house windows or plantations 6 Place the equipment on a solid smooth surface 7 Place the equipment in a location where dust and debris do not risk bei...

Страница 11: ...are in contact with hoisting ropes e g using cardboard 2 When the refrigerating unit is raised do not go beneath it 3 Weight CDU L Product weight 135kg Total weight including packaging 145kg 4 This pr...

Страница 12: ...ndatory 19mm for MT application 32mm for LT application 2 Avoid CO2 pipes contact with other conducts or pipes 3 Avoid installation in corrosive environment Low pressure equipment Evaporator Low press...

Страница 13: ...or 13 Remarks It s not necessary to add expansion valve on evaporator because the CDU has is own expansion valve Add just thermostat device with defrost control Evaporator volume MT 15000cc if more ri...

Страница 14: ...14 6 3 CDU L connected to several evaporators 14 Remarks Expansion valve for each evaporator One Pressure sensor by loop Evaporator volume MT 15000cc if more risk of poor lubrication LT 5000cc if mor...

Страница 15: ...kW Voltage 400V AC Frequency 50 60 Hz Electric consumption 5 5kW Rated curent 8 5A Electrical power 6 9kVA Ground fault circuit breaker 10A Power supply Communication Cabinet regulator GND Cooling dem...

Страница 16: ...CDU controls the HP to reach the HP target This HP optimal target is calculated in accordance with ambient outside temperature and the LP set point 5 Showcase EEV controls the superheat at the evapora...

Страница 17: ...Modifiez le style du titre 8 2 Electrical connection Thermostat 1 evaporator P N Supply thermostat Contact Fan Contact Defrost FAN Resistance CDU L CLA CLB Dry Contact 17...

Страница 18: ...regulator several evaporators Mandatory to supply 1 of the AKVH during the ramp down of the CDU to avoid discharge pressure cut AKVH control R14 01 On Off Remarks The contact of auxiliary relay KA NO...

Страница 19: ...g system 2 2 Charge Nitrogen gas in 80bar or 55bar if using 60bar relief valve 2 3 Check brazed part using leakage detector or leakage test liquid formability 3 Vacuuming 3 1 Set R744 CO manifold vacu...

Страница 20: ...Modifiez le style du titre 9 2 CDU connection to the evaporators 1 Remove process pipe 2 Insert pipe 3 Brazing pipe 20...

Страница 21: ...ce valves connection and handling 1 Untightened the protection caps 3 Untightened the compression packing 4 Service valve handling 2 Connect the CDU to the manifold Outlet Male G 3 8 Example of connex...

Страница 22: ...5 Compressor start running push operation SW if CO2 charging stop before reaching target weight 6 Close service valve after CO2 weight reaching target amount 7 Keep check cooling operation until evapo...

Страница 23: ...g amount estimation 23 Evaporator volume Piping length Example for a Medium temperature application at 5 C of evaporating temperature with an evaporator volume of 10 litres 15m A R of piping 1 4 3 8 C...

Страница 24: ...50 5 50 5 50 5 50 5 50 5 50 5 50 35 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 5 00 Target discharge temperature T_dis Ambient temperature T_amb 40 35 30 25 20 15 10 5 0 5 Evaporating temperature T_...

Страница 25: ...button DOWN UP and SET for 3 secs from normal display 2 CLA blinking on display A parameter 3 Press DOWN or UP if changing each parameter set as CLB or CHC 4 Press right SET button if entering each p...

Страница 26: ...parameter 1 Press only right SET button for 3 secs from normal display 2 P00 blinking on display P parameter 3 Press right button SET if moving other P parameter P01 P02 4 Press DOWN or UP if changin...

Страница 27: ...T amb for HP Calculation 33 33 27 19 14 12 12 12 A B15 Discharge Temp for HP Reduction Control 115 115 115 115 105 105 105 105 A B17 Target High Pressure Reduction bar 1 1 1 1 2 2 2 2 A B18 Reset Tem...

Страница 28: ...Modifiez le style du titre 11 3 Reading parameters list 28...

Страница 29: ...65 1 9337 20 16 2 1 2 2237 1012 8 58 816 163 14 436 44 0 86593 1 9287 21 15 2 2 2 2908 1008 60 728 165 34 436 27 0 87421 1 9237 22 14 2 3 2 3593 1003 1 62 697 167 55 436 09 0 88249 1 9187 23 13 2 3 2...

Страница 30: ...In case of dirt inside the CDU clean the outdoor heat exchangers with soft brush or vacuum cleaner 3 Water can be used in case of clogged heat exchanger Noted CDU operation should be stopped when usi...

Страница 31: ...Delivering CO2 solutions in commercial refrigeration THANK YOU 31...

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