SHELL-AND-TUBE DRY EXPANSION EVAPORATORS

PDHE standard version’s’ not extractable tube bundle’ one. This means that the tube bundle is expanded to the shell so the copper tubes can’t be removed from it.

Performance and Features :

The PDHE design has been optimized for R410A, R407C and R22 refrigerants but it can also work with R134A as well as other HFC refrigerants. It has been Developed for commercial and industrial refrigeration cooling with positive evaporation temperature, typically in a range of 2°C/-7°C. With its innovative patented refrigerant distributor and new optimized plastic baffles designed to improve the brine side heat transfer performances, the PDHE shell- and-tube evaporator series guarantees maximum efficiency, low cost, and compactness. The PDHE exchange tubes have a specific inner grooved/plain pattern to maximize the heat transfer coefficient and to limit the pressure drop negative effects.

THE PDHE Series.

The PDHE series has been desined for Commercial and Industrial refrigeration with Temperature require range 2°C – 7°C., The PDHE has been designed for all Standard HFC and optimised for R407 and R22 Refrigerant. THE PDHE series use specially inhouse fabricated Baffles for maxmum brine side heat transfer
performance.

The PDHE Series use unique inner grove pattern to maximuse heat transfer efficiently and keep pressure from dropping.

The PDHE Series is budget oriented with optimum performance to maintain high quality production.

Material

Seamless Carbon Steel Shell.
Fouling resistance Standard Copper Tubes.
Designed with safety and performance.
Copper Tubes Eapanded in Steel Flange Firmely for perfect sealing.
Easy to maintain with Functional side and End side are removeable.
Firrm and Stable Mount for installtion.

Dimensions

Legends Description Value Example
A Total Length 1045 mm
B Shell Diameter 168 mm
C Tube Sheet to Tube Sheet 890 mm
D Stand Length 441 mm
E Single Stand Length 180 mm
F Stand Total Length 255 mm
G Total Height : 315 mm
H Water Connection 38.1 mm
I Refrigerant Out-let 19 mm
J Refrigerant Out-let 19 mm

Design Data PDHE

  • STD : Standard Version
  • PS: Maximum Allowable Pressure
  • TS Max : Maximum Allowable Temperature
  • TS Min : Minimum Allowable Temperature
  • TP : Test Pressure

PDHE Special Version with Tmin=-40 C is available on demand. Please refer to PENEX for More Information.

Material :

The materials used for standard version of PDHE are the following:

Tubes : Copper/CU Nickle
Baffles: Plastic/SS
Tubes Sheet: MS/SS
Shell and Water Connections : MS/SS
Header and refrigerant connections : MS/SS

Different materials are available on request, according to the following list. Please refer to Penex for more Information.

CAPACITY AND MAXIMUM ALLOWABLE WATER FLOW CHART

  • Refrigerant =407c
  • Brine = Water
  • T_in_brine = 12°C
  • T_out_brine = 7°C
  • T_evap_dew = 2.60°C
  • T_cond_dew = 45°C
  • SC = 3K
  • SH = 5K

PDHE special version with Tmin = -40°C is available on demand. Please refer to PENEX for more information.

Model No. Gas Q_nom(kW) Q_nom(TR) W_nom(m3/h) DP_nom(PSI) Weight(App.)kg
PDHE 1-05 R407c 17.55 5 3.12 300 50
PDHE 1-08 R407c 28.08 8 5 300 52
PDHE 1-10 R407c 35.1 10 6.25 300 76
PDHE 1-13 R407c 46.63 13 8.12 300 84
PDHE 1-15 R407c 52.65 15 9.37 300 89
PDHE 1-20 R407c 70.2 20 12.5 300 135
PDHE 1-25 R407c 87.75 25 15.6 300 141
PDHE 1-30 R407c 105.3 30 18.7 300 168
PDHE 1-35 R407c 122.85 35 21.8 300 177
PDHE 1-40 R407c 140.4 40 25 300 188
PDHE 1-50 R407c 175.5 50 31.2 300 265
PDHE 1-60 R407c 210.6 60 37.5 300 276
PDHE 1-70 R407c 245.7 70 43.7 300 287
PDHE 1-80 R407c 280.8 80 50 300 335
PDHE 1-100 R407c 351 100 62.5 300 425

Q_nom : Nominal Cooling Capacity KW
Q_nom : Nominal Cooling Capacity TR
DP_nom : Design Pressure
W_nom : Nominal Water flow
SH : Super Heating
SC : Sub Cooling

General Dimensions :

Approx. Dimensions

PDHE Model A

mm

 B

mm

 C

mm

 D

mm

 E

mm

 F

mm

 G

mm

 H

mm

 I

mm

J

mm
PDHE 1-05 1018 141 890 441 180 228 245 1.5 23 19
PDHE 1-08 1320 141 1195 650 180 228 245 1.5 28 19
PDHE 1-10 1320 168 1195 650 180 254 315 2 35 23
PDHE 1-13 1620 168 1500 900 180 254 315 2 35 23
PDHE 1-15 1620 168 1500 900 180 254 315 2 35 23
PDHE 1-20 1645 219 1510 900 225 304 362 2 41 23
PDHE 1-25 1645 219 1510 900 225 304 362 2 41 23
PDHE 1-30 2550 219 2420 1825 225 304 362 2.5 41 28
PDHE 1-35 2550 219 2420 1825 225 304 362 2.5 54 28
PDHE 1-40 2550 219 2420 1825 225 304 362 2.5 54 28
PDHE 1-50 2690 273 2420 1825 280 355 410 3 54 35
PDHE 1-60 2690 273 2420 1825 280 355 410 3 76 41
PDHE 1-70 2690 273 2420 1825 280 355 410 4 76 41
PDHE 1-80 3315 273 3034 1965 280 355 410 4 76 41
PDHE 1-100 3315 323 3034 1965 326 406 465 4 76 41

Penex Quality Standards

Seamless Shell Pipe
Thickness : 6-8 mm

Tube Sheet
Thickness : 35-50 mm

Copper Internally Finned Tubes With 75 Internal Ridges of 0.3 mm groove depth at helix angle of 18 degrees

Copper Condenser Fin Tubes Outer Fins of 42 FPI with cross Knurling, plain ID

Phosphorus Deoxidized Copper (DLP) Standard SB – 75, 111, 359, 395 BS 2871 JIS H 3300 DIN 1787 IS: 1545
Symbol C – 12000 C 106 C 1201 SW-CU 25 Cu-DLP
Phosphorus Deoxidized Copper (DHP) Standard SB – 68, 75, 111, 280, 355, 395, 819 BS 2871 JIS H 3300 DIN 1787 IS:2501,10773,14810
Symbol C – 12000 C 106 C 1220 C 1220 Cu-DHP
Toudh Pithc Copper (ETP) Standard ASTM B-188 BS 2871 JIS H 3300 DIN 1787 IS:2501
Symbol C – 11000 C 101 C 1100 ECU 58 Cu-ETP

Manufacturing Line To Finish Goods