This article presents the technical characteristics of main equipment, being a part of heat pump from a previous article of the series. It should be reminded that the unit main elements are Bitzer 6JE-33Y-40P semi-hermetic reciprocating compressor of Ecoline series, Bitzer K1353T shell-and-tube condenser, Danfoss EnFusion™ B3-052-90 plate-type evaporator.
Compressor
Bitzer semi-hermetic reciprocating compressors of ECOLINE series are optimized special for R134a. Refrigerant R134a has very advantageous characteristics, especially for mean temperatures and heat pumps.
Figure 5.2.3 – Compressor 6JE-33Y-40P. Basic dimensions.
Reference numbers in the figure
1 High pressure connection (HP)
2 Installation point for injected gas temperature sensor (HP) or sensor of CIC system
3 Low pressure connection (LP)
4 CIC system: spray nozzle (LP)
5 Oil fill plug
6 Oil drain plug
7 Oil filter (magnetic plug)
8 Oil return (oil separator)
9а Gas equalisation (parallel operation)
9b Oil equalisation (parallel operation)
10 Crankcase heater
11 Oil pressure connection +
12 Oil pressure connection –
16 Connection for oil monitoring (oil pressure sensor or differential oil pressure switch “Delta-P”)
Table 5.2. The compressor technical characteristics
| Parameter name | Value | Measurement units |
| Compressor technical characteristics in operating mode | ||
| Compressor model | 6JE-33Y-40P | - |
| Refrigerant | R134a | - |
| Evaporating temperature | 1.00 | °C |
| Evaporating temperature | 64.0 | °C |
| Subcooling (after condenser) | 0 | K |
| Vapour suction temperature | 20.00 | °C |
| Electric power supply | 400V-3-50Hz | |
| Effective superheat | 100 | % |
| Capacity control steps | 100 | % |
| Refrigeration capacity | 33.7 | kW |
| Consumed power | 16.01 | kW |
| Current (400V) | 32.4 | A |
| Power supply voltage | 380-420 | V |
| Condenser capacity | 49.7 | kW |
| СОР/EER | 3.1/2.1 | - |
| Mass flow rate | 999 | kg/h |
| Discharge temperature without cooling | 99.5 | °C |
| Compressor nominal technical data | ||
| Volumetric capacity (1450 rev./min 50Hz) | 95.3 | m3/h |
| Number of cylinders х Diameter х Piston stroke | 6 х 65 mm x 55 mm | - |
| Weight | 231 | kg |
| Maximum excess pressure (LP/HP) | 19/32 | bar |
| Suction line connection | 54 mm – 2 1/8″ | - |
| Discharge line connection | 35 mm -1 3/8″ | |
| Oil type for:
R134a/R404A/R507A/R407A/R407C/R407F R134a at tc>70°C R22 (R12/R502) |
BSE32 (As a default)
BSE55 (Option) B5.2 (Option) |
|
| Motor version | 1 | |
| Maximum operating current | 53.2 | A |
| Winding ratio | 50/50 | |
| Starting current (rotor is blocked) | 165.0 AY/275.0 A YY | |
| Maximum consumed power | 30.0 | kW |
| Delivery set | ||
| Motor protection device | SE-B2 | |
| Protection index | IP54 | |
| Anti-vibration dampers | As a default | |
| Oil charge | 4.75 | dm3 |
| Discharge temperature sensor | + | |
| Start unloading | Option | |
| Capacity control 100-66-33% | Option | |
| Stepless capacity control 100-10% | + | |
| Additional fan | Option | |
| Oil service valve | + | |
| Oil heater in crankcase 140 W | + | |
| Oil pressure monitoring | ||
| MP54 | Option | |
| Delta-PII | + | |
| Noise parameters | ||
| Sound power level (+5°С/50°С) @50Hz R134a | 77.9 dB(A) @50Hz | |
| Sound pressure level @1 m (+5°С/50°С) @50Hz R134a | 69.9 dB(A) @50Hz | |
Condenser
Figure 5.2.4 – Condenser K1353T. Basic dimensions.
Reference numbers in the drawing
1 Refrigerant inlet
2 Refrigerant outlet
2а Refrigerant alternative outlet
3 Coolant inlet
3а: 4 passes
3b: 2 passes
4 Coolant outlet
4а: 4 passes
4b: 2 passes
5 Drain plug
6 Pressure gauge connection
7 Connection of pressure safety valve
Table 5.3. The condenser technical characteristics
| Parameter name | Value | Measurement units |
| Condenser technical characteristics in operating mode | ||
| Condenser type | K1353T | |
| Number of passes | 4 | |
| Series | Standard | |
| Refrigerant | R134a | |
| Condesation temperature | 64.0 | °C |
| Inlet water temperature | 59.0 | |
| Outlet water temperature | 63.7 | |
| Subcooling (after condenser) | 1.00 | K |
| Fouling factor | 0.000040 | m²K/W |
| Condenser capacity | 53.2 | kW |
| Operating volume flow rate | 10 | m³/h |
| Minimum volume flow rate | 2.92 | |
| Maximum volume flow rate | 14.59 | |
| Flow velocity | 1.71 | m/s |
| Pressure drop | 0.34 | bar |
| Condenser weight and size characteristics | ||
| Weight | 103 | kg |
| Total width | 1634 | mm |
| Total height | 381 | |
| Housing external diameter | 216 | |
| Refrigerant inlet | 42 mm -1 5/8″ | - |
| Refrigerant outlet | 35 mm -1 3/8″ | - |
| Coolant inlet (2 passes) | 2″ | - |
| Coolant outlet (2 passes) | 2″ | - |
| Coolant inlet (4 passes) | 1 1/4″ | - |
| Coolant outlet (4 passes) | 1 1/4″ | - |
| Refrigerant effective volume | 37.0 | dm³ |
| Maximum filling-up with refrigerant is 90% at 20 °С | ||
| R22 | 40.3 | kg |
| R134a | 40.8 | |
| R407C | 38.6 | |
| R404A/R507A | 35.6 | |
Evaporator
Figure 5.2.5. Evaporator B3-052-90. Basic dimensions.
Table 5.4. The evaporator technical characteristics
| Parameter name | Value | Measurement units |
| Quantity of plates | 90 | - |
| Depth, A | 221 | mm |
| Weight | 22.5 | kg |
| Circuit capacity | ||
| Cooling medium circuit (Q1-Q2) | 4.23 | l |
| Refrigerant circuit (Q3-Q4) | 4.14 | |
| Heat-exchange surface area | 1.232 | m² |
| Connections | ||
| Q1, Q2 | G1 1/2 | - |
| Q3 | ODF28 | mm |
| Q4 | ODF42 | mm |
