Difference between Jet Condenser and Surface Condenser?
Read: What is Jet condenser and Surface condenser - Advantages and limitations
Difference between direct contact and indirect contact condenser
| 
Jet condenser | 
Surface condenser | 
| 
Direct contact heat exchanger | 
Indirect contact heat exchanger | 
| 
Simple design. Manufacturing cost and maintenance cost is low            | 
Manufacturing cost and maintenance cost is high | 
| 
Mixing of vapour and condensing medium occurred | 
There is no mixing of vapour and condensing medium. They both
  separated by wall/surface | 
| 
Condensate may get impure due to mixing. Condensate cannot
  recirculate to the system unless it is free from impurities. | |
| 
The cooling medium should be pure. | 
Since there is no mixing quality of cooling medium is not important. | 
| 
Condensation is very fast. It requires less amount of condensing
  medium to condensate. | 
Condensation process is slow. Require a large amount of condensing
  medium to condensate unit amount of vapour. | 
| 
It requires small floor space | 
It requires large floor space | 
| 
It requires condensate extraction pump, the failure of this condensate pump
  leads to flooding of condenser. | 
Condensate extraction pump not required. | 
| 
Low vacuum efficiency. | 
High vacuum efficiency. | 
| 
It is less suitable for high capacity plants. | 
It is suitable for high capacity plant. | 
🔗Comparison between Air cooled and Water cooled condenser
