Performansi Alat Penukar Kalor Udara-Tanah (Earth-Air Heat Exchanger) dengan Siklus Terbuka di Kota Medan

Terang U.H.S. Ginting Manik, Tulus Burhanuddin Sitorus

Abstract


The purpose of this study was to obtain the performance of an EAHE (earth air heat exchanger) with weather conditions in the Medan city. The research method carried out was experimental in the field for several days with varying weather conditions. The air conditioning system using an Air-Earth Heat exchanger has tested its performance by comparing the experimental results with the model of equations that have been developed by the previous researchers. The incoming air velocity 2 m/s is obtained by the output temperature on average for the results experiment with 27.1oC and for theoretical results of 26.5oC with an average air temperature of 32.1oC. As for the incoming air velocity 3 m/s, the resulting output temperature averages for the experimental results of 27.3oC and for theoretical results of 26.9 oC with an average air temperature that is 33.8oC. The higher the air intake velocity, the higher the output temperature in the Air-Earth heat exchanger. At 2 m/s air velocity, the output temperature is 27.1oC and then rises to 27.3oC at air velocity enter 3 m/s. The effectiveness of the earth heat exchanger at the incoming air velocity 2 m/s for the experimental results was 0.84 while the theoretical calculation was 0.97. From the results of multiple regression analysis, it is found that the NTU and inlet air temperature values have a very strong relationship to the COP value. The correlation coefficient is 0.916 at a speed of 2 m/s and 0.959 at a speed of 3 m/s. The results show great potential for the development of ground-air heat exchangers as a passive cooling system building solution.


Keywords


Earth - Air Heat Exchanger; Performance; Medan City

Full Text:

PDF

References


BULUT H. et al., “Experimental analysis of an earth tube ventilation system under hot and dry climatic conditions. Proceedings of the 12nd National Sanitary Engineering Congress. vol 2. 1789-1804, 2014.

BEN J. D. et al., “Investigation of the ground thermal potential in Tunisia focused towards heating and cooling applications. Aplied Thermal Engineering. vol. 30. 10991-1100, 2010.

BISINIYA T.S., “Design of earth-air heat exchanger system. Geothermal Energy. vol 3. 18-28, 2015.

BELATRACHE D. et al., “Numerical analysis of earth air heat exchanger at operating conditions in arid climates. International Journal of Hydrogen Energy. 30. 1-7, 2016.

DE PAEPE. Et al., “Thermo-hydraulic design of earth air heat exchanger. Energy Bulid. vol. 35. 389-397, 2003.

INCROPERA F.P., “Introduction to Heat Transfer. Edisi ke 7. 2011. John Wiley & Sons. New York.

PFAFFEROTT J. “Evaluation of earth to air heat exchanger with a standarised method to calculate energy efficiency. Energy and Buildings. Vol 35. 971-983, 2003.

SERAGELDIN A.A. et al., ”Earth-air heat exchanger results, mathematical model and computational fluid dynamics simulation. Energy Conversion and Management. vol. 122. 25-38, 2016.

SITORUS T. B. et al. IOP Conf. Series: Materials Science and Engineering 309, 012089, 2018.

VAZ J. et al., “An experimental study on the use of Earth-Air Heat Exchanger. Energy and Buildings. Energy and Buildings. vol 72. 122-131 2014.

YANG D., et al., “Evaluation of the termal performance of an earth to air heat exchanger in a harmonic thermal environtment. Energy Conversion and Management. Vol 109. 184-194, 2015.

ZHANG J. “Investigation of airflow and heat transfer in earth to air heat exchanger. Ph.D thesis. Conccordia University, Montreal, Quebec, Canada, 2009.




DOI: https://doi.org/10.21776/ub.jrm.2019.010.02.6

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.