**Analysis of Dry-Bulb Temperature Drop in Counter-Flow Maisotsenko Air Cooling with Variations in Air and Water Mass Flow Rates**

Abstract

Maisotsenko Cycle (M-Cycle) evaporative cooling system is an alternative cooling technology that offers high energy efficiency
and environmental friendliness, as it requires no refrigerants and consumes significantly less electrical energy compared to
conventional compressor-based systems. This study aims to experimentally investigate the performance of a counter-flow
Maisotsenko cooling system under varying air-to-water mass flow rate ratios. The experiments were conducted using a
specially designed test rig, with three variations of air mass flow rates (0.055 kg/s, 0.041 kg/s, and 0.028 kg/s) tested against
three constant water mass flow rates (0.158 kg/s, 0.237 kg/s, and 0.316 kg/s). Performance parameters analyzed include wet
bulb effectiveness, dew point effectiveness, cooling capacity, and energy efficiency ratios (EER and COP). The results are
expected to reveal the relationship between air-to-water mass flow rate ratio and the thermal performance of the system,
particularly in achieving low supply air temperatures close to the dew point with high energy efficiency. This study aims to
contribute to the development of energy-saving and environmentally friendly cooling systems suitable for tropical climate
applications.