البارامترات الهندسية و الهيدروليكية المؤثرة في سطح التبادل الحراري للمكثفات الصندوقية العمودية المائية العاملة في آلة التبريد الضاغطة البخارية

الملخص EN

The heat exchange device (such as condenser) is essential elements in the thermal machines whether in thermal engines or refrigeration machines, and its play important role in performance of these machines.

the condenser which is used in refrigeration machine differ between each other from where the kind of the fluid which is used to remove the heat from vapor of the refrigeration fluid which comes from the compressor.

And at the first of these condenser is shell and tube condenser which is used water and it is classified to horizontal condenser and vertical condenser which is the goal of our study because it has many advantage: however is the capacity of the condenser is big, , low cost of establishment, and the important advantage is the fall possibility of the sediment which form within the tubes because of the cooling water circulation and that facilitate tubes cleaning.

Therefore the purpose of this research is studding the effect of various parameters on the area of heat exchange surface for vertical water condenser by simulation because we need to make a lot of difficult calculation which we can't make it manually after have been trusted that the simulation gives precise results.

The results show that the heat exchange surface of ammonia machine is smaller than Freon machine.

However, results indicate that there is a negligible effect of condensing temperature on heat exchange surface.

And that small increase in velocity of cooling water will be useful because its decrease the area of heat exchange surface.

Also we plot diagrams which help engineers to select appropriate design for condenser without need to complex equation.