TY - JOUR
TI - Effect of thermal energy storage in energy consumption required for air conditioning system in office building under the African Mediterranean climate
AU - Abdulgalil Mohamed M
AU - Kosi Franc F
AU - Musbah Mohamed H
AU - Komatina Mirko S
JN - Thermal Science
PY - 2014
VL - 18
IS - 11
SP - 201
EP - 212
PT - Article
AB - In the African Mediterranean countries, cooling demand constitutes a large  proportion of total electrical demand for office buildings during peak hours.  The thermal energy storage systems can be an alternative method to be  utilized to reduce and time shift the electrical load of air conditioning  from on-peak to off-peak hours. In this study, the Hourly Analysis Program  has been used to estimate the cooling load profile for an office building  based in Tripoli weather data conditions. Preliminary study was performed in  order to define the most suitable operating strategies of ice thermal  storage, including partial (load leveling and demand limiting), full storage  and conventional A/C system. Then, the mathematical model of heat transfer  for external ice storage would be based on the operating strategy which  achieves the lowest energy consumption. Results indicate that the largest  rate of energy consumption occurs when the conventional system is applied to  the building, while the lowest rate of energy consumption is obtained when  the partial storage (demand limiting 60%) is applied. Analysis of results  shows that the new layer of ice formed on the surface of the existing ice  lead to an increase of thermal resistance of heat transfer, which in return  decreased cooling capacity.