Counter Flow Heat Exchanger Graph

The flowing bodies can be liquids gases or even solid powders or any combination of those.

Counter flow heat exchanger graph.

The operation of the hexagonal heat exchanger in a ventilation unit is subject to the laws of thermodynamics with the basis for calculating its operating parameters as shown below figures 2a and 2b present the basic thermodynamic transformations for heat recovery applications as illustrated on the mollier or psychrometric chart. Crossflow parallel flow and counterflow heat exchanger configurations are three examples. A heat exchanger can have several different flow patterns. Parallel and counter flow designs heat exchangers although ordinary heat exchangers may be extremely different in design and construction and may be of the single or two phase type their modes of operation and effectiveness are largely determined by the direction of the fluid flow within the exchanger.

Therefore the log mean temperature for a counter flow heat exchanger is larger than the log mean temperature for a similar. In heat exchanger analysis if the fluid inlet and outlet temperatures are specified or can be determined by simple energy balance the lmtd method can. The number of transfer units ntu method is used to calculate the rate of heat transfer in heat exchangers especially counter current exchangers when there is insufficient information to calculate the log mean temperature difference lmtd. A counterflow heat exchanger will require less heat exchange surface area than a parallel flow heat exchanger for the same heat transfer rate and the same inlet and outlet temperatures for the fluids.

Energy balance of the hexagonal heat exchanger.