Energy Analysis of Steam Cycle Efficiency with Feed Water Heater Modification (Case Study: PT. Pertamina EP Asset 1 Field Lirik)

The increasing energy efficiency program will decrease the consumption of energy. If these improvements are carried out together, it will certainly ensure energy reliability for a sustainable and better future. The aim of this paper was to investigate the possibility of increasing efficiency in the crude oil heating system at PT. Pertamina EP Asset 1 Lirik Field. The research method was done by modification the steam cycle using the close and open Feed Water Heater (FWH). As result, the efficiency of steam cycle of close FWH increased 2.53% and 2.78% for open FWH. While the efficiency of the steam cycle in the initial conditions was 36.74%.

Environmental and Economic Optimization and Sizing of a Micro-Grid with Battery Storage for an Industrial Application

This study focuses on the sizing and optimization of a micro-grid with storage, which is destined to supply the load of an economic activity zone (EAZ) in Sidi Bouzid, Tunisia. To solve this problem, a genetic algorithm is established and programmed into MATLAB. The objective functions are considered by providing three minimums, namely Greenhouse Gas emissions (GHG), Life Cycle Cost (LCC) and Embodied Energy (EE), for three values of loss of power supply probability (LPSP) previously fixed. The sizing and optimization results are found and evaluated using a time series exchange of energy during a year to determine the optimal component size of a photovoltaic/wind/battery system (PV/WT/Bat). The simulation results show that the lowest ratio of LPSP values corresponds to the higher GHG, EE, LCC, photovoltaic panels area (APV), battery storage capacity (Cn), wind turbines area (AWT) and vice versa. This means that demanding higher energy reliability leads to higher energy cost and pollution. A comparative analysis was made, showing the cons and pros of each LPSP value in order to allow the owner of the plant to choose the most suitable PV/WT/Bat configuration.

Incentive-based demand response: Case study

The present article discusses the development of a demand response system on a residential setting given that the proper management of energy resources by users can solve scarcity and energy reliability issues. The behavior of 1000 residential users is modelled through a peak control program based on economic and energy-related incentives. A demand response (DR) application is used where remuneration depends on scarcity pricing. The case study is shown including a mathematic algorithm and the application. The results obtained with the application exhibit a reduction of energy peaks, which translates into more efficient energy management which in turn is remunerated by scarcity pricing. It is concluded that the incentive-based DR program is viable both energy-wise and financially.