The Influence of External Cooling Load on the Distribution of Temperature and Humidity in Conditioned Spaces

Arwizet Karudin; Jai Kumar Sharma; Desmarita  Leni; Muhammad Rabiu Abbas; Adriansyah Adriansyah

doi:10.24036/ijimce.v1i1.8

Authors

Arwizet Karudin Departement Mechanical Engineering, Universitas Negeri Padang, INDONESIA
Jai Kumar Sharma Departement Mechanical Engineering, ITM University, Gwalior , INDIA
Desmarita Leni Departement Mechanical Engineering, Universitas Muhammadiyah Sumatera Barat, INDONESIA
Muhammad Rabiu Abbas Departement Air Engineering, Air Force Institute of Technology, NIGERIA
Adriansyah Adriansyah Departement Mechanical Engineering, Politeknik Negeri Padang, INDONESIA

DOI:

https://doi.org/10.24036/ijimce.v1i1.8

Keywords:

Air conditioning, air conditioner, cooling load, distribution, temperature

Abstract

Air conditioning is not only important for the comfort of occupants in a building but also for various industrial processes. In the air conditioning process, a device called an Air Conditioner (AC) is required. The AC load can originate from inside the room and from outside the room. This study aims to determine the influence of increased cooling load from outside the room on the distribution of temperature and air humidity inside the conditioned room. The method used in this study involved conditioning four rooms. Two rooms of almost the same size were equipped with two AC units each, while the other two rooms used one AC unit each. Temperature and air humidity data inside the rooms were recorded every 20 minutes, as well as the outside air temperature. Dry bulb thermometer (Tdb) and wet bulb thermometer (Twb) were used to record temperature and humidity data, along with an environmeter. The research data were processed using available equations and with the assistance of a psychrometric chart. The research findings revealed that the average distribution of temperature and air humidity in the meeting room and office headroom of the Pertamina DP-LPG Office in Binjai was 20°C-23°C and 59%-65%. For the distribution office and sales service room of the Pertamina Fuel Filling Terminal in Kisaran, the distribution of temperature and air humidity was 25°C-29°C and 62%-66%. From the test results, it can be concluded that the distribution of temperature and air humidity is highly influenced by the capacity of the AC units and the cooling load entering the room.

Downloads

Download data is not yet available.

References

X. Meng, L. Yan, and F. Liu, “A new method to improve indoor environment: Combining the living wall with air-conditioning,” Build. Environ., vol. 216, p. 108981, May 2022, doi: 10.1016/j.buildenv.2022.108981.

Y. Xue, K. Zhao, Y. Qian, and J. Ge, “Improved operating strategy for air-conditioning systems based on the indoor occupancy rate,” J. Build. Eng., vol. 29, p. 101196, May 2020, doi: 10.1016/j.jobe.2020.101196.

D. Khovalyg et al., “Critical review of standards for indoor thermal environment and air quality,” Energy Build., vol. 213, p. 109819, Apr. 2020, doi: 10.1016/j.enbuild.2020.109819.

N. Ma, D. Aviv, H. Guo, and W. W. Braham, “Measuring the right factors: A review of variables and models for thermal comfort and indoor air quality,” Renew. Sustain. Energy Rev., vol. 135, p. 110436, Jan. 2021, doi: 10.1016/j.rser.2020.110436.

Z. Yang et al., “Investigation of thermal comfort of room air conditioner during heating season,” Build. Environ., vol. 207, p. 108544, Jan. 2022, doi: 10.1016/j.buildenv.2021.108544.

G. Yanti, “PRODUKTIVITAS TENAGA KERJA DENGAN METODE WORK SAMPLING PROYEK PERUMAHAN DI KOTA PEKANBARU,” SIKLUS J. Tek. Sipil, vol. 3, no. 2, pp. 100–106, Oct. 2017, doi: 10.31849/siklus.v3i2.385.

R. Rissetto, M. Schweiker, and A. Wagner, “Personalized ceiling fans: Effects of air motion, air direction and personal control on thermal comfort,” Energy Build., vol. 235, p. 110721, Mar. 2021, doi: 10.1016/j.enbuild.2021.110721.

S. Tong, J. Wen, N. H. Wong, and E. Tan, “Impact of façade design on indoor air temperatures and cooling loads in residential buildings in the tropical climate,” Energy Build., vol. 243, p. 110972, Jul. 2021, doi: 10.1016/j.enbuild.2021.110972.

A. Adriansyah, D. Leni, and R. Sumiati, “Comparative analysis of energy-efficient air conditioner based on brand,” J. Polimesin, vol. 21, no. 04, Aug. 2023, doi: 10.30811/jpl.v21i4.3625.

Y. Cheng, B. Yang, Z. Lin, J. Yang, J. Jia, and Z. Du, “Cooling load calculation methods in spaces with stratified air: A brief review and numerical investigation,” Energy Build., vol. 165, pp. 47–55, Apr. 2018, doi: 10.1016/j.enbuild.2018.01.043.

S. Hou and H. Zhang, “An open reversed Brayton cycle with regeneration using moist air for deep freeze cooled by circulating water,” Int. J. Therm. Sci., vol. 48, no. 1, pp. 218–223, Jan. 2009, doi: 10.1016/j.ijthermalsci.2008.03.015.

B. Xu, X. Xie, G. Pei, and X. Chen, “New view point on the effect of thermal conductivity on phase change materials based on novel concepts of relative depth of activation and time rate of activation: The case study on a top floor room,” Appl. Energy, vol. 266, p. 114886, May 2020, doi: 10.1016/j.apenergy.2020.114886.

A. Karanafti, T. Theodosiou, and K. Tsikaloudaki, “Assessment of buildings’ dynamic thermal insulation technologies-A review,” Appl. Energy, vol. 326, p. 119985, Nov. 2022, doi: 10.1016/j.apenergy.2022.119985.

Y. Heru Irawan, D. Sugati, Harianto, M. Abdulkadir, Y. A. Jayatun, and D. R. Hartana, “Investigating the Temperature and Air Velocity Distribution of Split- Type Air Conditioners Using Computational Fluid Dynamics,” in 2018 4th International Conference on Science and Technology (ICST), Yogyakarta: IEEE, Aug. 2018, pp. 1–6. doi: 10.1109/ICSTC.2018.8528596.

Maimuzar, Ruzita Sumiati, Haris, Desmarita Leni, and Aggrivina Dwiharzandis, “Perancangan Aplikasi Berbasis Web Sebagai Alat Pendukung Keputusan Dalam Memilih Ac Hemat Energi,” J. Rekayasa Mater. Manufaktur Dan Energi, vol. 6, no. 2, Sep. 2023, doi: 10.30596/rmme.v6i2.16255.