Improvement of Heat Pipe Solar Collector Thermal Efficiency Using Al₂O₃/Water and TiO₂/Water Nanofluids

Table 2

Devices and technical features used in preparing nanofluid.

Device name	Technical specifications
Ultrasonic bath (Bandelin DT 255 H)	(i) Voltage: 230 V-50/60 Hz; (ii) Ultrasonic power: 160/640 W; (ii) Heater power: 280 W; (iv) Ultrasonic frequency: 35 kHz; (v) Internal volume: 5.5 L
Precision scales (Precisa XB 320M)	(i) Precision: 0.1 mg; (ii) Measuring range: 0.02-320 g