Abstract:
The purpose of thesis was to study the air conditioning system performance in building using both
solar energy and thermal energy storage system. The research procedures are the design and
creation of both air conditioning system and thermal energy storage. The study of thesis was to
detennine parameters effected on the air conditioning and thermal energy storage performance.
The system consists of three following parts: 1) parabolic sun minor reflection with 1.54 m2 in area.
2) heat exchanger device with hed-coil tube to exceed heat exchanger efficiency upon 10 kW in
power of air conditioning system. 3) thermal energy storage system in cylindrical-shaped made by
PVC with 5 cm in thickness. Copper tube attached fin surround tube inside of storage was used to
exceed heat exchange efficiency. The 200 kg of Paraffin with melt point at 55-60 C celsices and 190 kJ/kg
of latent heat contains in thermal storage in order to store heat energy. There were the water used as
heat exchanger which flow through parabolic sun mirror reflection. The experiment to determine
heat transfer coefficients was controlled by water flow adjustment as following flow rates: 9 LPM,
12 LPM, 15 LPM and 18 LPM for observation of both charging and discharging between thermal
energy storage and air conditioning system. According to the air flow, the experiment was
controlled by air velocity adjustment at 2.80 m/s , 3.54 m/s , and 4.76 m/s , respectively. The study of
heat transfer coefficients was to implement mathematical model. According to charging time, the
heat transfer coefficient of thermal storage (UA) showed heat energy at 15 LPM of water flow is
equal to 0.64 kW/C celsices in average. According to discharging time, the heat transfer coefficient of
thermal storage (UA) showed heat energy at 15 LPM of water flow is equal to 1.20 kW/C celsices in
average. The heat transfer coefficient of air conditioning system (UAF) during charging time
adjusted 15 LPM in water flow rate and 4.76 m/s of air velocity is equal to 0.43 kW/C celsices. The
research that the charging time is 8 hours with 15 LPM of water flow and 2.80 m/s of air flow will
take discharged time about 9 hours. Moreover, The latent heat according to the paraffin changing
form was continuously used about 3 hours and 40 minutes. In conclusion, during both charging and
discharging time, the average temperature and relative humidity with comfortable zone are equal to
24.94 C celsices and 43.03%, respectively.