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KyungDong R&H

Unit cooler, Air cooling condenser, Cooling coil, Condenser and more
Name

Feature

Series Ammonia Unit Cooler
Product Description

 

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 

KyungDong R&H Feature
 
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 
 

KyungDong R&H Feature  1
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

largeOnly 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
NDA

Only Extreme FreezingMaximum 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= - - - - - - - -
K(△T)xC

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

KyungDong R&H Feature  2

 

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.