Abstract:
Energy is considered as the backbone for every country's industrial sector’s development, modernization and the demands are increasing worldwide. Around 32–35% of the total energy of the world is being used by the industrial sector. Shortfall of electricity in Pakistan and a large difference in demand-supply of electricity emphasis on the alternative / cost effective solutions of the electricity. Cooling load is the major consumer of electricity around 50% of the electricity is being consumed by the cooling systems world-wide. In this regard, the uses of cooling technologies like Absorption Cooling have been a desired solution due to instantaneous availability of the sun in the region. Electrical power costs for cooling are often the largest expenditure for most occupied buildings. Pakistan is already facing the power shortfall, so it is an intense need to utilize the available energy resources to its maximum and integrate the alternative renewable energy resources for large scale applications effectively and efficiently. Solar thermal energy application is an initiative towards the sustainable and zero-carbon energy future. In this work a comprehensive energy assessment is carried out in a textile mill located in Faisalabad Pakistan. Classification of the textile mill was done on the basis of energy consumption and the waste heat recovery potential. Processing unit is the major consumer of thermal energy. It was found that power generation unit has considerable energy recovery potential. The modeling of the waste heat recovery system is done on TRNSYS. The main components of the model are, internal combustion engines, heat exchangers, fluid flow pumps, absorption chiller and the solar thermal hot water system (STHWS). From the modeling and the real time data calculations, it was concluded that hot water from engine’s jacket has 10,936 MWh of energy which can be recovered annually. Recovered energy in conjunction with solar thermal energy system will run absorption cooling system (505RT) to replace the existing electricity-based chiller. The system will save 3,504,000 KW h annually. Also the system will contribute 52708.8 tons of 𝐶𝑂2emission reduction.
