[en] Packed bed units generally, represent the most suitable storage units for air heating solar systems. In these systems the storage units receives the heat form the collector during the collection period and discharges the heat building at the retrieval process. A method for sizing of packed bed storage in an air heating system is represented. The design is based on the K-S curves, which have been generated for the storage used in the C SU solar House II through simulation. The complete simple solar heating system is simulated numerically during both the heating and retrieval processes. The simulation, which utilizes the hourly meteorological data, takes into account consideration of the principle parameters such as pressure drop across the bed, particle diameter, and mean void age. The results are compared with the reported data from a real size of storage and also with the criteria of f-chart recommendation

[en] In this paper the study and layout of an assembly of wind turbines in a wind farm is presented. The arrangement of two wind farms as an example in Manjil/ Iran and austria reviewed and due to complexity of the problem, referring to experimental methods, using WASP or Wind Pro computer codes available from Risoe National Research laboratories and Emd international A/S, Denmark is advised