Heat exchanger H.X.s is the equipment used to transfer the thermal energy between two or more
fluids at varying temperatures. The nature of this paper is an experimental study of the optimum
design for shell and tube heat exchanger as a condenser with high productivity of drinking
water for portable solar water distiller. The elaboration covers the aspects of considerations,
design, fabrication, and test of the shell and tube H.X. as a portable condenser for solar water
distiller system. The system consists of a portable stainless steel condenser, which is able to be
dismantled and assembled without tools. The experimental result establishes that the condenser
is able to produce 3.8 liter /hour of distilled water from vapor at 99.7˚C of inlet temperature and
4 liter/hour vapor flow rate, with 130 liter /hour as a condenser coolant water flow rate. The heat
efficiency of the condenser can be increased by means of minimizing the tube’s thickness and
vapor inlet pressure. There is no back pressure effect on the system and the pressure drop in
both sides of the condenser is reportedly of very low value and negligible, therefore, no need
for a pressure pump is to be eliminated.
Stack ventilation in the hot and humid climate is inherently inefficient due to minimal air temperature differences between indoor and outdoor environment of a naturally ventilated building. Solar induced ventilation is a viable alternative in enhancing this stack ventilation. This paper aims to demonstrate investigations on the effective solar collector orientation and stack height for a solar induced ventilation prototype that utilizes roof solar collector and vertical stack. The orientation of the solar collector is significant as it determines the amount of solar radiation absorbed by the solar collector. Meanwhile, the height of the vertical stack influences the creation of the stack pressure in inducing air movement. Investigations were executed using a simulation modelling software called FloVENT. The validation of the simulation modelling against physical experiment indicated a good agreement between these two results. Analyses were executed on the air temperature increments inside the solar collector. A high increment of the air temperature resulted in the effective orientation. Meanwhile, the air temperature and mass flow rate of the various heights of the vertical stack were also analyzed. The findings concluded that the recommended orientation for the prototype’s solar collector is the west-facing orientation. It was also found that the higher the vertical stack, the lower the air temperature inside the stack would be, but with greater induced mass flow rate.