PRE-FEASIBILITY STUDY FOR THE OPTIMIZATION OF ENERGY CONSUMPTION AND CARBON DIOXIDE GAS EMISSIONS IN CONDENSATE STABILIZATION UNIT THROUGH THE APPLICATION OF HEAT PUMP SYSTEM INTEGRATED DISTILLATION TECHNOLOGY

• Main Author: Ali Hazmi, Hilman
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/68034
• Institution: Institut Teknologi Bandung

The phenomenon of global warming originating from excessive carbon dioxide gas emissions has caused serious damage to important sectors of human life. Therefore, in line with the government's efforts to reduce the effects of prolonged global warming, this study evaluates measures that can increase the greenery level in crude oil field facilities. This study aims to conduct a pre-feasibility study of technoeconomics by comparing the integrated heat pump distillation and multi-stage flash vaporisation technologies for the application of a new condensate stabilization unit (greenfield), so that utility consumption in the form of heating load and electrical power and the amount of carbon dioxide gas emissions can be reduced significantly. The base model applies multi-stage flash vaporisation technology, with a heating load requirement of 2750 W and an electrical power demand of 2034 kW. Simulation modeling for all models within the scope of this study was carried out using the ASPEN HYSYS software in steady state conditions. Optimized models 1 and 2 are modifications of the base case model by applying the feed splitting stream feature for heat utilization. Optimized model 3 is a modification of the base case model by applying the feed splitting stream feature along with stabilizer column and reboiler to replace the LP separator feed heater and LP separator. Optimized models 4 and 5 are modifications of the base case model by applying mechanical vapor recompression and heat integrated distillation column technologies. The technical aspects that are evaluated are utility consumption in the form of heating and electrical power loads, along with the amount of carbon dioxide gas emissions, while the economic aspects that are evaluated are total investment costs, total operating costs, and total annual costs. The evaluation related to the economic aspect is carried out based on a minimum feasibility estimate of class V with an accuracy of -30%/50%. Optimization model 5 has the smallest total duty and carbon dioxide gas emissions rate among all optimized models, approximately 4784 kW and 201 kg/h, with a percentage saving of total duty and carbon dioxide gas emissions rate with respect to the base model around 63.5% and 57.41%, respectively. However, optimized model 4 has the lowest OPEX cost, around $517,231, because optimized model 4 has a smaller power requirement of about 65.8% compared to optimized model 5. For a small difference in total duty, the electrical power requirement becomes the determining factor of OPEX level, because the production cost of electric power utility is more expensive than heating load utility. Therefore, optimized model 4 has the smallest TAC among all optimized models, around $3,247,015, with a TAC saving percentage with respect to the base case model of 31.25%.