Sector HighlightBeing an agricultural country, Nepal produces variety of agricultural products and these also need to be stored at low temperature for extending their useful life.Cold storage association has 23 members in their list and it has reported that there are 35 cold storages in the country with an average capacity of 3,000 MT each.
Observations Potatoes and fruits are the main products stored They consume only electrical energy for cooling process The rate of electricity charge is subsidized 50% by NEA All units have DG set to supplement the power during power failure Motor loadings are not checked Power factor is low – none used capacitor banks Many incandescent lamps are used Air curtains are not used
Production & Turnover Fiscal Year Fiscal YearS. No. Particular 2009/10 2010/11 1 Storage Capacity in MT 35,720 40,720 2 Storage in MT 20,407 21,669 Annual Turnover in 3 72.06 84.38 Million NPR 4 Share to the Sector 66.86%
Energy and fuel, CO2 & DGS. No. Particular Total Quantity Quantity per MT 1 Electrical Energy in kWh 6,143,628 283.53 a. Purchased Electricity 5,184,889 239.28 a. DG sets 958,739 44.25 2 Thermal Energy in GJ - - 3 CO2 generation in kg 541,462 24.99 a. Purchased Electricity 7,298 0.34 a. Diesel 534,164 24.65 4 Total DG set capacity in KVA 2,090 a. Diesel consumption Liter 199,315 9.20 5 Energy Cost NPR 31,985,995 1,476.15 Energy cost is around 37.91% of the turnover
Saving PotentialsRegional energy intensity could not be obtained.The specific energy consumption has been found to be 283.53 kWh/MT of product storedAnnual storage quantity = 21,669 MTsaving potentials from ESPS audits, = 5.93% of electrical energyThe electrical energy saving potential will be = 0.0593*283.53 *21669 kWh = 364,328 kWh = 364.328 MWh
Areas of Potential Savings Compressor motor loading Efficient motors Power factor improvement Improvement in insulation of the cold pipelines, storage room walls and ceiling More efficient belt and pulleys Partition of cooling areas, installation and effective use of air curtains Regular cleaning and maintenance of condenser pipes Replacement of incandescent lamps Minimization of leakages of compressed ammonia gas