Amad Office carried out this project with a view for the evaluation of achievable energy in the residential air conditioners in the Kingdom of Saudi Arabia. The prevailing air conditioners in the Kingdom are near the minimum standard performance of Energy Efficiency Ratio (EER) at T1 (35 degrees Celsius temperature) of 7.5 and 5.4 at T3 (46 degrees Celsius temperature). The current global trend for design of air conditioners does not give enough attention to the performance of air conditioners in the conditions prevailing in the Kingdom and the result is excess energy waste, especially in peak days.
In this project, air conditioners specifically designed to perform well at hot conditions reaching 46°C are promoted. The results from laboratory testing demonstrated the potential for efficiency improvement of up to 36 percent and peak demand reductions of up to 26 percent on mini-split units.
The higher efficiency units present economic, administrative, and technical challenges. The Ministry of Education specifies units with a T1 EER of 8.5 (an 11.6% energy savings).
Sensible EER is not currently used in rating KSA air conditioners. The current ratings are the sum of sensible cooling and dehumidification per watt hour. The ratings are Total EER, rather than Sensible EER.
The current ratings of overall energy efficiency ratio (EER) and the minimum norms for it were determined at two external temperatures: 35°C (T1) and 46 °C (T3). But the most appropriate in the drier places in the Kingdom of Saudi Arabia is the use of the sensible energy efficiency ("Sensible EER"), which is the overall energy efficiency ratio (EER), multiplied by the sensible heat ratio ("SHR").
Increasing the sensible energy efficiency ratio ("Sensible EER") at a temperature of 46 °C (T3) will reduce the peak load. Increasing the minimum requirement of the energy efficiency ratio by 15% for window air conditioners and 25% for Mini-Splits in the residential sector will reduce the maximum peak load in the Kingdom by 743 MW on the basis that the rate of "market penetration" in the residential sector is 30%. This increase in efficiency will realize an annual saving in energy of more than 2.10 TWh.
Since the same window and mini-split conditioning units are often used to cool the nonresidential buildings as well, this will lead to more savings in energy in the Kingdom and reduction of peak load.
Amad office cooperated in the implementation of such project with advisory bodies, testing agencies, factories and importers, the office established a strong database in this field and was able to gain the confidence of this category of air conditioners sector linking them to the standardization and conformance activities by adhering to the standards and undergoing tests needed to verify of the validity of energy efficiency ratio. Amad was granted the following completion certificate for this project: