【Weekly Topic】【HVAC Version 20160429】
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Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. When a fluid with constant physical properties flows through a pipe and convective heat transfer occurs, once it enters the stage where heat is well-developed, the surface heat transfer coefficient hx will ( ). A. Remain unchanged B. Increase C. Decrease D. Increase first and then decrease. [Haichuan Thanksgiving] -- Production Division. The Production and Management Division is seeking moderators and technical discussants to join us. Notice regarding the launch of the “I’m Saving Energy, Where Are You?” campaign in the Petrochemical Division
A, unchanged ~~~~~~~~
When a fluid with constant physical properties flows in a pipe and convective heat transfer occurs, once it enters the region where heat is well developed, the surface heat transfer coefficient hx will (D) A. remain unchanged B. increase C. decrease D. increase first and then decrease