The inlet and outlet temperatures in a counter-flow heat exchanger are given as

Thi=hot fluid inlet temperature = 260 C

Tho= hot fluid outlet temperature = 70 C

Tci=cold fluid inlet temperature = 18C and

Tco=cold fluid outlet temperature = 57 C

The total area of the pipes in the exchanger is 5.9 m and its R-value is given as 0.08 km w Find the heat transfer rate of the heat exchanger, assuming no heat loss to the outside world Give your answer in KW to 2 s.f