| dc.description.abstract | The OTEC case study with a plate heat exchanger measuring 50 mm wide x 1500
mm long titanium material previously managed to show its excellent corrosion
resistance performance with an overall heat transfer coefficient of 20% higher than
normal surface sheet, but the cost and availability of this material outweighs the
benefits offered, gained from lifetime operation. The plate type heat exchanger is
physically thin, very hard and inflexible, so it is susceptible to effects such as
turbulence and friction and abrasives due to mechanical factors. OTEC research as an
alternative uses Cu-Sn heat exchanger material with a shell and tube type that is thick
and resistant to extreme weather effects and chemical factors. The purpose of this
research was to build a new model of Cu-Sn Heat exchanger Shell and Tube in the
OTEC system through Aspen and CFD BEM and BJM type simulations where the
observed parameter values were temperature, pressure, mass flow rate and working
performance. Then, Building a Shell and Tube OTEC Cu-Sn Heat exchanger
Prototype in a 1:6 Scale Model (scale down) measuring 60 mm wide x long. The
simulation results carried out by Aspen Plus and Ansys CFD in a closed cycle OTEC
on the new model Cu-Sn Heat exchanger Shell and Tube OTEC are very effective on
the BEM type, it is recommended that laboratory scale prototypes be made, which are
the results of comparisons with the BJM type. Where laminar flow maintains the
temperature of the working fluid, compared to the flow in the BJM type heat
exchanger. Average capacity: Q = 166,248 J/s = 166,248 watts, and the results of the
calculation of the hot water test in the average capacity condenser: Q = 374.5 J/s =
374.5 watts. Overall heat transfer coefficient (U) for Evaporator 523 W/m2 0C
Overall heat transfer coefficient (U) for Condenser 524 W/m2 0C and Mass flow rate
of hot water (ṁ) = 0.114 kg⁄s. | en_US |
