SHELL AND TUBE HEAT EXCHANGERS

SHELL AND TUBE HEAT EXCHANGERS

Design data PED (CE) approval

VersionTubes sideShell side
DP (bar)DT (°C)Tmin (°C)PT (bar)DP (bar)DT (°C)Tmin (°C)PT (bar)
STD1090-1014.330120-1042.9
HP1690-1022.948120-1068.6
DP Design PressureDT Design TemperatureTmin Minimum temperaturePT Test Pressure

The XS-S-M in item’s description is set according to shell diameter and the chart below.

Dshell Min – Max range
mmInches
XS5116826.63
S1943247.6312.75
M3564571418
L5086102024
XL66010072642

 

Capacity Table

CRF serie has been optimized on three different shell sizes, according to the approach requested
 

CRF (Tower version – 2P)
Ti = 30°C To = 35°C, SC = 3 [K], FF = 4.3E-05 [m²K/W]
CRF Model 5 ft162-5
XS
163-5
XS
164-5
XS
211-5
S
212-5
S
213-5
S
214-5
S
271-5
S
272-5
S
273-5
S
274-5
S
322-5
S
323-5
S
324-5
S
401-5
M
402-5
M
403-5
M
404-5
M
452-5
M
453-5
M
454-5
M
R407C
Tc = 44.5°C (dew)
Tg = 85°C
Qn
(kW)
109123142166197225249287320353410481530598681746829930100310811151
R134a
Tc = 40.0
Tg = 55°C
Qn
(kW)
111125145169201230255293327361420493544614698765851956103011111184
CRF Model 6 ft162-6
XS
163-6
XS
164-6
XS
211-6
S
212-6
S
213-6
S
214-6
S
271-6
S
272-6
S
273-6
S
274-6
S
322-6
S
323-6
S
324-6
S
401-6
M
402-6
M
403-6
M
404-6
M
452-6
M
453-6
M
454-6
M
R407C
Tc = 43.0°C (dew)
Tg = 85°C
Qn
(kW)
111125145168200229253292325359417489540608692758843946102011001172
R134a
Tc = 38.5
Tg = 55°C
Qn
(kW)
10611913916119222024428031234540147152058666773181491498510621132
CRF Model 7 ft162-7
XS
163-7
XS
164-7
XS
211-7
S
212-7
S
213-7
S
214-7
S
271-7
S
272-7
S
273-7
S
274-7
S
322-7
S
323-7
S
324-7
S
401-7
M
402-7
M
403-7
M
404-7
M
452-7
M
453-7
M
454-7
M
R407C
Tc = 42.0°C (dew)
Tg = 85°C
Qn
(kW)
113126147170203233257296330365424497548618704770858962103711171190
R134a
Tc = 37.5
Tg = 55°C
Qn
(kW)
10111413215318321023226629832938244849555863669777587093810111079
Wm(m³/h)22.426.530.634.742.948.954.061.369.376.588.7103.9116.1132.7150.8165.3183.6207.6224.4241.8262.6

 

Ti Inlet water temperatureTo Outlet water temperatureSC SubcoolingFF Fouling factorTc Condensing temperatureTg Inlet gas temperatureQn Condensing capacityWm Water maximum flow
Evaporators
ApplicationTechnologyBenefits
The new CRF condenser has been developed for HFC cooling applications at medium pressure (PS 30 bar) and high pressure (PS 48 bar) within refrigeration, process cooling and air conditioning.
The secondary fluid is usually fresh water that can be in a closed loop with a cooling tower (tower application) or in an open loop with a well (city application). Some applications can use also glycol.
These applications usually require a condensation temperature in a range of +30°C/+50°C depending on the system working condition and its efficiency rating.
The CRF design has been optimized for R407C/F and R134a refrigerants but it can be also utilized with HFO1234ze, R410A, R404A and R507.
Thank's to its new high performance tubes, new headers, new shell and the new baffles, the Alfa Laval CRF models provide maximum efficiency with a low cost/kW.
This is an important step ahead compared with the current CDEW and CDEW-E models; the new CRF is ready to fight with competition.
  • High efficient condenser tube which allows an overall performance increase vc. CDEW models keeping the water pressure drop at the same level.
  • Refrigerant connections optimized for R134a to reduce the pressure drops.
  • Three tube lenghts to match operating conditions with different temperature approaches.
  • Compact design with about 15%-20% shorter lenght and weight comparing with existing solution.
  • Water flow optimized to reduce the fouling and erosion risks.

Condensors
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