Design of Solar Water Heater Using Collector Cylindric Parabolic and Coil Heater as Absorber at Focus Point

Solar thermal water heating systems have been developed to replace conventional heating. Therefore, the design of a parabolic cylinder collector-type solar unit with coil-shaped heater (absorber) has carried out. The cylindrical collector is made an aluminum plate covered reflective sticker and base insulated, having diameter, height, length, position focal point 150, 60, 200, 22.4 cm, respectively. coil 3/8-inch diameter copper pipe pitch, length 20, 3, 200 concentration ratio between area 3.6. results trials conducted from 10:00 16:00 WIT, in Duplo 100 liters circulated through at speed 0.017 kg/sec, indicate that affected by fluctuations radiation intensity. Thermal efficiency inversely proportional time. lower time when difference temperature incoming outgoing gets smaller, or other words evening approaches steady state. achieved maximum water-heating 53C average range during test 687-693 W/m 2 .