Advatage of KYUNG DONG NH₃UNIT COOLER
1. High efficiency of the unit cooler
improve over20% capacity than the existing steel aero fin coil
2. Lighter in weight
60% reduction than the existing steel cooler
3. Acquired advanced manufacturing technology of the japaness cooler maker
4. Obtained the certificate of I.S.O 9002
To apply advanced the Quality Assurance System
Build-up Customer Satisfaction
5.Hight efficiency of Defrost by registered patent
Reg NO.120899, 129519
6.100% Defrost test and Inspection
Prevent scattering onthe defrost and improvement of defrost efficiency
Feature AL Tube Cooler
1.Advanced technical products by the advanced technology guidance
(Supplied 60sets of Ammonia Unit Cooler in 1998)
2. Application of Hi-fineness Aluminum by the perfect corrosion resistance(99.7% over)
3. Strengthening of internal pressure strength on the welded part by special welding application-pressure test is a over35kg
4. Application of insulatiomn flange for perfect electric corrosion resistance
5.Enhancement of heat transfer area and water spray defrosting efficiency through the selection of 5. PLATE FIN
6. High efficiency of heat transmissbility by 5/8"(φ16 tulb)
7. Maximum of the drain effect by using of the duble pan
8. Application of Defrosted water staying type on the drain pan
(preventing accumulated ice): See left sketch.
9. Increasing of Blower efficiency and effect of lower power consumpation by NOVENCO FAN
10. Increasing of capacity and long lasting trust by using of the Fan Motor IP54
11.Gracefulness of external appearance and perfect corrosion resistance used by galvarium steel sheet
(material of planting : aluminum 45%, galvanized 55%)
With the special structure of plate consisting of hole on the defrost
1. Reduce scattering Q'ty to outside on the defrost than nozzle type
water spray defrost by the natural head
2. Constant defrost effect
Increasing of the defrost effect by hole interval and size adjustment in accordance with the fin distance.
3.Prevent ice formation on eh cold storage
4.Perfect Defrost of Header by using of the nozzle
ㆍLOAD COMPLY WITH ROOM TEMP.AND FIN PITCH
TYPE | TYPE | 용도 | FEATURE | |
| Ceiling Mounted Type S | S | Small, Middle, Light Weight Propeller Fan Front Side Discharge Type | 38mm pipe pitch Freezing Storage Room(Small and Middle Size) | |
| Ceiling or Floor Mounted Type | PP,PA | Extreme Freezing Room(Middle and Large size) COMBINED with Propeller FAN and Axial FAN Front Side Discharge Type | 50mm pipe pitch Freezing Storage Room(Middle and Large Size) | |
| Floor Mounted Type | F | large | Only Sater Defrost Use Axial FAN Cold Storage | Maintaining Constant Room Temp by Bottom Suction with Upper Discharge |
| Front Side Suction Floor Mounted Type | FV | Variable defrosting method Axial fan Low-temp Storage Room Freezing Room | New prodcut Optimum of the Heater Defrost to Cold Storage | |
| AXIAL Separation Floor Mounted Type | D.P.F | Only Extreme Freezing | Maximum of the Freezing Capacity | |
ㆍLOAD COMPLY WITH ROOM TEMP.AND FIN PITCH
FIN PITCH | ROOM TEMP | STORED GOODS | Transfer Area |
6.5mm | Over-5℃ | LOW TEMP STORAGE ROOM | 20m²/R.T |
6.5,8.5mm | 0~-25℃ | 16m²~30m²/R.T | |
8.5,10mm | -25~-35℃ | RERIGERATION,COLD STORAGE | 30m²~35m²/R.T |
10, 12mm | Below -35℃ | FREEZING ROOM | 35m²~40m²/R.T |
ㆍUNIT COOLER Design example in accordance with temp.application
TYPE | NPP,NPA | NPA,NFA | NPA,NFA | NPA,NDA |
Room Temp | +5℃~-5℃ | -5℃~-10℃ | -10℃~-25℃ | -25℃이하 |
Standard Temp | 0℃ | -10℃ | -25℃ | -35℃ |
Application of demanded load | 1.Please calculates demanded cooling capacity 2.Please choose temp. Difference between room temp and evaporation temp. 3.Plase select fin pitch which is suitable for condition 4.please consider correction factor by frost | |||
Demanded cooling area | Q x 3320 | A : Demanded Cooling Area(M²) Q : Demanded Cooling Capacity(R/T) K : Heat Transfer Coefficient(kcal/m²h℃) T₁:Refigerant Evaporation Temp(℃) T₂:Temp of the Freezing(℃) | ||
K (Kcal/m2h ℃) | 28.2 | 24.7 | 22.3 | 18.8 |
Recommended transfer area | 16~21 | 19~26 | 27~33 | 36~44 |
* Rigorous review should be carried out on the capacity of UNIT COOLER in terms of TD and leveling according to humidity conditions of stored goods (level compensation factor: C value).
UNIT COOLER Diagram
It must be considerated following items on the selection of UNIT COOLER
ㆍThe celection of fin pitch have to considerate
① Evaporating Temp ② Items of the stored goods..
ㆍThe selection of optimum fin-pitch is referring to "p":
-20℃ | -5℃~-20℃ | -5℃~+5℃ | +5℃ adove | |
6.5m/m~8.5m/m | 0.5~0.55 | 0.6~0.65 | 0.5~0.55 | 0.5~0.55 |
10m/m~12m/m | 0.6~0.7 | 0.7~0.8 | 0.6~0.7 | 0.6~0.7 |
Above mentioned table shows the value of themal capacity and the fin pitch in accordance with the frost. It must be compensated when desingning of the UNIT-COOLER..
ㆍTD and humidity condition of stored goods exert a influence to the capacity of UNIT-COOLER.
ㆍThe selection of unit cooler system exert a influence to the changing of heat transfer, When unit-cooler ids placed order with the selection of direct expansion, liquid overseed system,
ㆍliquid pump. It must be considerated following items : .
① Capacity ② TYPE ③Kinds of Refrigerant④ Electric pressure ⑤Room temp and humidity ⑥ Evaporating Temp ⑦ Defrost type.
