Abstract
The air conditioned auditorium classroom was monitored for energy consumption by a monitoring platform. One year collected data from energy consumption and indoor climate monitoring systems and outdoor climate data in Phitsanulok province, Thailand, where its climate classified as the tropics, was employed to determine their relation by regression analysis. The analysis of climate data showed that the outdoor temperature above 26 oC was accounted for 70% of the year this emphasizes on cooling requirement. Furthermore, the hourly cooling energy consumption ranged from 8.1 to 10.3 kWh for indoor air temperature between 20 oC and 32 oC. The higher outdoor temperature causes the greater cooling energy consumption. The correlation between outdoor temperature and cooling energy consumption with linear regression showed the correlation coefficient of 0.38 while the correlation between temperature difference and enthalpy difference of the outdoor and indoor found the correlation coefficient of 0.71. This pointed out that the outdoor tropical climate highly affected to the cooling energy demand.
Highlights
The rise of global temperature due to climate change has been realised
The results show the increase of 2oC on the temperature setting combined with thermal inertia would reduce 18% cooling energy consumption
The majority of outdoor climate data was with high humidity where the relative humidity of over 60% was detected at the temperature from 25 oC to 30 oC
Summary
The rise of global temperature due to climate change has been realised. The statistical data recorded since 1880 show the warmest year in 2016 with the global surface temperature of 0.99 oC above the average global surface temperature relative to 19511980 [1]. A comfort temperature of the indoor environment is expected This is considered a significant point relate to cooling energy demand which has caused air conditioning system as a predominant energy consuming appliance in the building. By increasing 1oC on the thermostat setting, the energy reduction of about 6% can be found in Singapore and Thailand while the power consumption reduced further to 34.4% when raising 2oC in Taiwan [5] These are supported well by adaptive thermal comfort model that regarding to adapted behavior of people in the tropics to the outdoor climate lesser cooling can be expected. The data mining from the energy consumption and indoor climate monitoring system of an air-conditioned lecture hall at Physics Department building, Phitsanulok province, Thailand was employed. The research finding on the effect and relation between outdoor climate and cooling energy consumption would be benefit to building energy management in this climate region
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