THERMOSIPHON HEAT RECOVERY SYSTEM IN AIR CONDITIONER WATER HEATER

• Main Author: PRATAMA (NIM : 13105099); Pembimbing : Dr. Ir. Abdurachim Halim, RENDY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16955
• Institution: Institut Teknologi Bandung

A Thermosiphon heat recovery system that recovers heat rejected from an air conditioner to heat water for residential and commercial use with 148.7 l capacity was designed ,constructed and tested. Air conditioner used in experimental test has 9000 BTU/h of cooling capacity. System heat exchanger is extension refrigerant copper pipe with helix coil-shape placed in small water tank between compressor and condenser. Diameter of refrigerant pipe is 0.25 in and the length is 15 m. Thermosyphon system consists of smaller water tank as heat source with 18.3 l capacity, bigger water tank as storage with 148.7 l capacity and two 0.25 in plastic hose as connector pipe beetween two tanks. The distance between the two tanks is approximately 1 m. This paper presents an experimental setups with different configuration in connector pipe height difference. Difference configuration setups was needed to obtain heat transfer characteristic for each configuration and to know which configuration gives best performance. This paper also presents comparison of calculation and experimental data of system performance and heat transfer characteristic. Test result shows that the fastest time to heat water to achieve goal temperature 45oC is 3 hours 24 minutes provided by experimental setup type 1 with 0.65 m height difference. Heat recovery from an air conditioner by thermosiphon is attractive because it eliminates the need for a circulating pump. Results indicate that further research is needed to know the best combination of system design to obtain a commercial worth system