Answer the following problems in detail.
problem 1) Describe the design consideration of horizontal and vertical axis wind machine.
problem 2) Describe the working principle of thermionic convertors.
problem 3) What do you mean by geothermal energy? Describe its types.
problem 4) Describe the fuel properties of bio gas and community bio gas plants.
problem 5) Describe in detail the strategy for meeting the future energy requirements.
problem 6) Describe the operating principle of MHD generators. And describe various types MHD systems.
problem 7) Describe the application of solar energy in water, space and process heating.