Category Archives: Engineering

6th International India Oil and Gas Pipeline Conference – April 2017

 International India Oil and Gas Pipeline Conference pic
International India Oil and Gas Pipeline Conference
Image: asme.org

Maarky Thermal Systems operates out of Cherry Hill, New Jersey. Under the leadership of president Ranga Nadig, the company provides a variety of heat transfer equipment and services. Maarky Thermal Systems belongs to the American Society of Mechanical Engineers (ASME), which will host the 6th International India Oil and Gas Pipeline Conference (IOGPC) in April 2017.

A nonprofit event designed by engineers for engineers, the conference serves as a forum for the transfer of best practices and standards and fosters technical exchange among key corporate players in the onshore pipe industry. The two-day event will welcome industry leaders, engineering professionals, and policy makers from across the world to engage in an assortment of learning opportunities. It will also explore a myriad of industry issues while examining the necessary priorities to keep the industry moving forward.

The technical program at IOGPC will focus on sharing knowledge and inspiring new technologies in the India and international oil and gas transmissions industries. It will include four technical tracks and a panel discussion highlighting the challenges in the pipeline industry. Furthermore, the conference will feature an exhibition hall, speeches from keynote speakers, and presentations of select technical papers chosen from among professional submissions.

Members of ASME’s India chapter in cooperation with global members of the ASME Pipeline Systems Division established the IOGPC, which will take place in Mumbai, India, April 20 through April 22, 2017.

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Designing Condenser Evacuation Systems for Power Plants

Condenser Evacuation Systems pic
Condenser Evacuation Systems
Image: maarky.com

Offering leading edge heat-transfer equipment, Maarky Thermal Systems meets the needs of a global client base of power producers. In June 2016 Maarky Thermal Systems president Dr. Ranga Nadig presented at the ASME Power and Energy Conference in Charlotte, North Carolina, on the topic “Evacuation Systems for Steam Surface Condensers: Vacuum Pumps or Steam Jet Air Ejectors?”

In steam power plants, steam released from the turbine undergoes condensation within a vacuum environment that is cooled by either air or water. One common problem involves air leaking into the condenser through faulty seals, valves, and flanged connections. As this has a negative impact on condensing functions, non-condensable air that becomes trapped in the system must be continuously evacuated.

A key question plants face is whether to use motor-driven vacuum pumps or steam-driven jet air ejectors. This decision involves weighing factors such as costs, motive steam availability, and end user preferences. Some plants bridge these differences through multi-stage hybrid systems that are effective in operations requiring low suction pressure.

Nitrogen as Storage Medium for Concentrated Solar Power Plants

Solar pic
Solar
Image: maarky.com

At an international industry conference in December 2015, Maarky Thermal Systems president Dr. Ranga Nadig delivered his paper entitled “Nitrogen Based Thermal Storage Medium for Concentrated Solar Power Plants”. The said paper is a patent pending concept of Maarky Thermal Systems.

The paper notes that in a Concentrated Solar Power Plant, thermal storage is used to negate the loss of electrical power generation at night. At daytime the thermal storage material is heated to higher temperatures and then stored in huge containers. In the evening, high pressure steam is generated using the energy from the heated material. This high pressure steam powers a turbine generator which produces electricity.

The preferred thermal storage material is molten salt. Using molten salt poses a number of difficulties. This includes having to obtain it in large amounts and transporting it to the solar plant which may be in a remote location. Inconsistencies in the salt composition can cause changes in thermal properties and melting temperature. The freezing point of molten salt is also at 550ºF needing expensive additives to lower the freezing point.

Using nitrogen has a number of advantages over molten salt. It can be simply be extracted from the air at the plant site and with 80 percent of the atmosphere composed of nitrogen the supply is abundant and free. It can be stored in huge containers and has stable thermodynamic properties. The freezing problem no longer exists as nitrogen stays in gaseous state over a wide temperature range.

Feedwater Heaters by Maarky Thermal Systems

Feedwater Heaters pic
Feedwater Heaters
Image: maarky.com

Led by company president Ranga Nadig, Maarky Thermal Systems serves power plants worldwide and designs advanced equipment for heat transfer systems from its headquarters in Cherry Hill, New Jersey. Maarky Thermal Systems is also a supplier of feedwater heaters to the power industry.

Feedwater heaters designed by the company offer reliable and efficient performance. The absence of cross flow velocities in the desuperheating zone minimizes the pressure drop and the incidence of flow induced vibration. Optimized spacing of baffles in the subcooling zone maximizes the heat transfer coefficient while restricting the pressure drop to specified limits. The heaters internals include design features to offer improved performance and structure integrity.

Heaters are designed for steam turbine applications from 10MW – 1,000 MW and for a wide ranging configuration included but not limited to two tube pass, four tube pass, one zone, two zone, three zone, horizontal, vertical channel up, vertical channel down and duplex heaters.

For more information about Maarky Thermal System’s feedwater heaters and other products, visit the company’s website at maarky.com/products.