Introduction: The material here was presented at the Energy Management & Efficiency Session/TIEEP Energy Forum at the AIChE Southwest Process Technology Conference, Thursday morning, October 1, 2020.

Forum Overview: Cogeneration is the sequential production of two different forms of energy from a single source, and it is an important technology for enhancing energy efficiency. Most often the two forms of energy produced are heat and power. In our session we have 3 presentations, providing different perspectives on cogeneration. The first talk looks at cogeneration from the perspective of an engineering and construction company, the second takes the viewpoint of an owner/operator, and the third looks at cogeneration as a tool to enhance grid reliability and resilience. We hope you’ll find these diverse perspectives interesting and insightful.

Use of Cogeneration in Large Industrial Projects

Guest Speaker: Jim Loney, Fluor

Abstract: This presentation looks at the extent of the use of cogeneration in recent large industrial projects executed by Fluor. For revamp projects, how are any increased requirements for steam and electric power addressed? For new facilities, to what extent is cogeneration being included in the design? What are the considerations when deciding whether to implement cogeneration? A brief overview is given describing the relative energy efficiency gains when using cogeneration compared to other strategies for supplying steam and electric power.

• Session Slides

Optimum Design and Operation of Complex Steam Systems at Oil & Gas Industries Through Combined Heat and Power Optimization Model

Guest Speakers: Mana Owaidh, Abdulaziz Dulaijan, and Abdulrahman Hazazi, Saudi Aramco

Abstract: The steam and power systems in oil, gas, refining & petrochemical facilities are very complex and require optimization models to support operation to achieve required objective while meeting all constraints with the least operating cost. For the subject objective, Saudi Aramco has developed a combined heat and power (CHP) optimization model for each site. These models were found to be extremely useful in understanding the interactions between the various utility’s major components. These components include boilers, cogeneration units, steam turbines, steam system network including process steam users and BFW condensate system. The interactions between these components create areas for energy optimization opportunities that lead to energy savings, GHG emission reduction and operating cost reduction. The mode considers key design and operational constraints such as: minimum steam reserve, equipment minimum and maximum operation limits as well as ensuring steam balance and energy balance is closed throughout the analysis. In addition, CHP optimization model for new design has been deployed at Saudi Aramco new facilities with energy savings benefits exceeding 10% from base case design. This paper covers several case studies addressing both operational and design improvements via utilizing the CHP optimization model, includes:

• Evaluating the economics of various Cogeneration options
• Evaluating the optimum sizing of a new STG

• Evaluating the impact of Boilers load management
• Identifying the best combination between steam turbines and motors meeting process pumping and compression requirements with the least operating cost.

• Session Slides

Sponsor: TLV

Guest Speaker: Eric Lethander, TLV

CHP, Energy Resilience and Grid Reliability

Guest Speakers: Gavin Dillingham and Carlos Gamarra, US DOE CHP TAP

Abstract: Combined Heat and Power (CHP) is a clean, flexible, robust on-site generation technology. With CHP an organization can improve on-site power resilience, thereby reducing business disruptions, while at the same time reduce overall power costs. Further, CHP does not only providing on-site benefits, but also can support the entire power grid through the provision of ancillary services, load shedding and shaping, and power export, as well as supporting grid-wide renewable energy integration. Many of these services are particularly important in locations with grid congestion and price volatility. Join the US Department of Energy’s Southcentral CHP Technical Assistance Partnership team, Dr. Carlos Gamarra, P.E. and Dr. Gavin Dillingham, to discuss how CHP can significantly improve energy resilience and grid reliability through strategic, flexible operation of the CHP plant. Further, learn how CHP is becoming the go to resource to support renewable energy integration in both on-site microgrids and the power grid.

• Session Slides