PENGUKURAN LAJU PENYERAPAN KALOR PADA TANGKI AIR SWH DENGAN VARIASI FLUKS KALOR

Conventional Solar Water Heaters have the disadvantage of mismatching the time of heat
absorption with the time of its use. A Thermal Energy Storage (TES) tank used using the
Sensible Heat Storage (SHS) method to overcome this problem. In this method use water
as heat storage as water has high conductivity characteristics. Water has a drawback of low
energy density; low energy density then added paraffin wax. Paraffin wax has the
disadvantage of low conductivity. Low conductivity, copper powder is added because it
has a high conductivity. The use of water intended as a base case for the study of paraffin
wax and copper (Cu) powder. This research focuses on how much water to absorb heat.
The purpose of this study was to determine the evolution of temperature, time, heat
transfer, and speed of temperature rise when charging.
This study adopted water as a Heat Transfer Fluid (HTF). The heater used as a
heat simulator given by the sun; the hot water produced by the heater pushed by the pump
entering the TES tank. Thermocouples installed in the TES tank connected to the data
logger. Recording temperature once every 5 seconds. The charging process runs
continuously until the outlet temperature of the TES tank reaches a temperature of 70 C.
The charging process is repeated over and over on four discharge variations. The variations
are 170 Volts, 180 Volts, 190 Volts and 200 Volts.
The results of this study indicate the occurrence of temperature evolution during the
charging process. The temperature propagates vertically, horizontally and axillary. The
fastest growth of temperature at 200 volts, while the fastest time for water to reach a
temperature of 70⁰ at 200 volts. The highest value of heat absorption in the variation of
190 volts is 4.28 J / hr. The highest temperature rise is in the axial direction with a voltage
of 200 volts. The average temperature increase is 10.84 C / hour.