M.A Mahmoud

Benha University · Department of Mechanical Engineering

A low energy HDH (humidification-dehumidification) and AC (air-conditioning) hybrid system using an efficient design of dehumidifier (strips-finned helical coil) and packing pad material (cellulose paper in bee-hive structure) is proposed. An experimental investigation of the performance of the proposed system is conducted for wide ranges of air an...

In hot and dry climatic zones, direct evaporative cooling (DEC) system is used as an economical and efficient alternative to traditional air conditioning systems. The present paper concerns comprehensive experimental investigations and analysis of heat and mass transfer characteristics and thermal performance parameters of a bee-hive construction o...

A comprehensive experimental investigation of the performance enhancement of cooling-dehumidifying helical coils using strips fins was conducted. Finned and un-finned coils (base case) were tested at wide ranges of air flow rates, temperatures and humidity at vertical and horizontal orientations. The results showed that (i) for all coil orientation...

In this paper a comprehensive experimental parametric study on the performance of a new evaporative cooling pad type made of cellulose papers in bee-hive structure is presented. Four different pad sizes of face area 0.335 × 0.390 m² and thicknesses 35, 70, 105, and 140 mm are examined. The tests are carried out in a wind tunnel adapted with the eva...

The air conditioning systems of low humidity applications consume huge amount of energy to maintain the required low temperature and humidity needed by the application. In the present work, proposed efficient systems that integrate the technologies of desiccant dehumidification, evaporative cooling, and fresh water production with the air condition...