job order for energy audit of sub stations and transformers at af stn sirsa , checking of electrical system network , it should cover substations , sub station equipments , ac plants , pump houses , reactive power compensation , power factor improvement in metering etc . transformers ( 48 nos ) : the audit scope should include study of 48 transformers with ring main units and vacuum circuit breakers located at air force permises , their loading pattern , reconfiguration , renetworking , load balancing , losses and efficiency and possible suggestion to improve efficiency and life based on life cycle cost . electrical motors & pumps ( above 10hp ) : the operation of electric motors/pumps should be studied using appropriate instrumentation support to assess the loading pattern , power factor , flow operating efficiency and other operational parameters . this should also include detailed study of the mechanical power transmission system to evolve suitable recommendations wherever feasible for energy efficiency improvements . study of cooling towers associated with central ac plants . this should include detailed study of the operational performance of the cooling towers through measurements of temperature difference , air/water flow rate to enable evaluate specific performance parameters like approach , efficiency etc . study of lighting system of hangers and blast pens: a comprehensive study of the entire lighting system covering the light source ( lamps ) , luminiares ( reflectors etc ) , and the gears ( ballsts ) should be taken up . besides this the illumination levels required viz-a-viz available should also be studied . study of air conditioning & refrigeration system: the study should involve name plate details comparison with analysis of various parameters like co-efficient of performance , tonnage delivered , effectiveness of the ducting etc of the air conditioning systems . also the study should include the performance evalution of the allied system . green energy options and feasibility study . energy management policy and strategy . the reports would highlight the energy conservation opportunities ( ecos ) which are practically feasible in the plant along with the investments required and list of suppliers for installation of energy efficient equipments .