2. OZONE- AND CLIMATE FRIENDLY PRODUCTS
USING ZERO ODP AND LOW-GWP REFRIGERANTS
IN PARTICULAR NATURAL REFRIGERANTS
TECHNICAL SPECIFICATIONS
INVESTMENT AND OPERATING COSTS
ENERGY EFFICIENCY
MARKET AVAILABILITY
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
4. Our products / high pressure compressor
N6HK
GH series
MAYEKAWA Europe nv/sa
Reciprocating compressor
N6HK
Pressure : 40bar
50bar (available February 2010)
Speed : 900~1600rpm at 40bar
900~1450rpm at 50bar
Swept volume; 120~193m3/h 100%Load
Screw compressor
Pressure: 50bar
Speed : 2950rpm, 3550rpm
Swept volume 2950 / 3550 rpm
N160GHS: 434 / 522 m3/h
N250GHS; 1552 / 1867 m3/h
N320GHS; 3212 / 3865 m3/h
Note : N160GHS applied with frequency driven motor.
DOC.2010-141 R1
5. Capacity table
MAYEKAWA Europe nv/sa
200kW 10,000kW600kW 1,000kW 5,000kW
N6HK 190~550kW
N160GHS 490~1400kW
N250GHS 2500~4400kW
N320GHS 5500~9700kW
Qh @2950rpm (N6HK ~1600rpm maximum)
Hot water outlet temperature 70~85℃（Tc=75~90℃)
Heat source temperature 20~50℃（Te=15~45℃）
Note: This capacity is included two stage heat pump capacity.
DOC.2010-141 R1
17. Complete package heat pump unit
MAYEKAWA Europe nv/sa
Specifications;
Heat capacity: 480kW(maximum)
Compressor speed: 900~1600rpm (frequency inverter drive)
Absorbed power:39~75kW
Heating COP=6.4 Hot water conditions Heat source: Hot spring
Temperature:40→60℃ Temperature:40→35℃
Flow rate:20.6m3/h Flow rate:69.8m3/h
Use application: Process water in the factory
DOC.2010-141 R1
19. 2. OVERCOMPRESSION HEAT PUMP
to produce 60°C hot water for meat factory process
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
20. High stage heat pump unit
MAYEKAWA Europe nv/sa
Existing system
MAYEKAWA M-HSH Unit
Water inlet
Hot water outlet
Condenser
Sensible heat
exchanger
N6HK
Receiver
Condenser 40°C
High receiver
Evaporator
Modification point
Total COP = 6.0~up to 9.0
12°C 60°C
DOC.2010-141 R1
21. Two stage heat pump unit
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
23. MAYEKAWA Europe nv/sa
COSTS STEAM HP SUMMER HP WINTER
Heating capacity kW/day 5581 5581 5581
Steam load (latent heat
0.6395kW/kg)
Kg/day 8727
Heating capacity/hr kW 406 305
Running time/day hr 13.7 18.3
Operating days days 300 115 250
Yearly heating capacity mWh 1.674 640 1.396
Energy per year 2.618 (ton)
(steam)
65.698 (kW, 41.7kW/hr) 191.235 (kW, 41.8kW/hr)
Energy cost € 91.342
(34.89€/ton)
4.599 (0.07 €/kWh) 13.386 (0.07 €/kWh)
Installation cost
(excl.watersystem)
€ 186.000
Yearly running cost
saving
€ 73.357
Payback time years Approx.2.6
DOC.2010-141 R1
24. 3. OVERCOMPRESSION HEAT PUMP
to produce 77°C hot water for district heating
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
25. Two stage heat pump unit
Condenser
Heat recovery vessel
30~40℃
77℃
Heat source
River water / wastage water / geothermal water
Sea water ……
Heat recovery ( Evaporator )
60℃
MAYEKAWA Europe nv/sa
Low stage Compressor
High stage Compressor
Intermediate pressure control is very important.
Best solution :
Install Frequency drive at low stage compressor.
Install stop valve before high stage compressor.
DOC.2010-141 R1
26. Two stage heat pump unit
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
27. Two stage heat pump unit
MAYEKAWA Europe nv/sa
DOC.2010-141 R1
