The heat transfer and resistance characteristics of the detachable plate heat exchanger composed of two different corrugated depth plates were studied by experimental method and comparative method. Each kinds of corrugated depth plates were divided into three corrugated angle combination of the hard plate (63°/63°)

or soft plate (29°/29°)

or mixed plate (63°/29°). The test was divided into two working conditions

one was that flow velocity of hot side synchronize with cold side

both sides were equal in every moment; The other was that flow velocity of hot side was always 0.5 m/s

flow rate of cold side was increased from 0.2 m/s to 0.9 m/s. The medium of each side was water. The value of the total heat transfer coefficient and pressure drop of two conditions were calculated

and the corresponding curves were described. The experiment proved that the total heat transfer coefficient of the shallow density corrugated plate was higher than that of the ordinary corrugated plate at the same corrugated angle combination

the average value was higher than 140 W/(m2·K)

so the heat transfer coefficient was increased by 1.9% on average

and the difference of the heat transfer coefficients in the mixed plates was above 300 W/(m2·K)

which was up to 4.8%

and the change trend of flow resistance was the same as the heat transfer coefficient. The functions of Nusselt number and friction factor were obtained

the correctness of the experiment was proved by comparing with the existed research results

it also revealed that there was room for optimization of the heat transfer performance and resistance of the two kinds of corrugated plates

which pointed out the direction for further research. The experiment also shown that the difference of the functions of Nusselt and friction coefficient about two kinds of corrugated plates with the same geometry size except the depth and the same structure were obvious.