![In a counter flow heat exchanger hot fluid enters at 100°C and leaves at 50°C](https://www.gkseries.com/blog/wp-content/uploads/2023/09/In-a-counter-flow-heat-exchanger-hot-fluid-enters-at-100°C-and-leaves-at-50°C.jpg)
Q. In a counter flow heat exchanger, hot fluid enters at 100°C and leaves at 50°C. Cold fluid enters at 30°C and leaves at 40°C. If heat losses are ignored, then the logarithmic mean temperature difference (LMTD) is °C (round off to 1 decimal place).
Ans: 35-38
Sol:
Using the equation LMTD =
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-753.png)