Performance of the cross flow MonoBlock™ heat exchanger of Polypropylene

This page indicates the performance of a certain design of our cross flow heat exchanger. Please notice that the MonoBlock heat exchanger core can be manufactured in any shape and dimensions. This gives us the opportunity to optimise each MonoBlock™ for any specific requirement or application.

Performance

The MonoBlock™ concept allows a large variety in performance for a specific dimension. The heat exchanger performance and pressure drop are dependent on the number of extruded sheets and the spacing between them. As indicated in the figures the closest spacing gives the highest transferred heat but also the highest pressure drop.

Please send us some appropriate data and we will design a state-of-the-art heat exchanger of polypropylene for your specific application.

MonoBlock™ 300x300x150 mm

The performance to the right have been established for a standard cross flow heat exchanger unit with the outer dimensions 300x300x150 mm, thin PP-sheets and close spacings.

Entries

The indicated performance was determined using the following entries:

• Cross flow core

• 300x300x150 mm

• Close spacing

• Hot air inlet temperature = 30ºC

• Cold air inlet temperature = 15ºC

Pressure drop

The internal and outer dimensions of the MonoBlock™ heat exchanger can be chosen in order to achieve maximum performance for a specific maximum pressure drop. 

In the graph below, the maximum pressure drop through a standard 300x300x 150 mm MonoBlock™ heat exchanger is displayed. 

The pressure drop can easily be lowered at either hot or cold side in the MonoBlock™ heat exchanger, simply by choosing a thicker PP-plate or by using larger spacing.

Click on the graph to view it in high resolution.

Transferred heat

The transferred heat of the studied cross flow heat exchanger with entry values as stated to the left is shown in the graph below. 

Click on graph to view it in high resolution.

The transferred heat can also be affected by the heat exchanger design. Closer spacing and thinner PP-sheets, i.e. a higher heat transfer area to volume ratio, gives a higher transferred heat to the cost of higher pressure drops.

Temperature efficiency

In the graph above there are two plotted lines for the temperature efficiency. This is due to the fact that the temperature efficiency is defined differently for the hot and the cold media. The MonoBlock™ heat exchanger is available in pure cross flow and counter flow. The temperature efficiency is increased when taking counter flow effects into account. The cross flow heat  exchangers can be mounted in two-stages or multiple-stages taking advantageous counter flow effects into account. This will also enable higher temperature efficiencies.