Displaying 1–25 of 26 results for Riyaz Papar, Energy Columnist
Free software tools available through the U.S. Dept. of Energy can help junior engineers as well as experts achieve energy efficiency improvements.
Sometimes during an energy analysis engineers focus on an issue that doesn’t impact the analysis much and doesn’t deserve much attention. Realizing which issues really affect the analysis is crucial for performing an efficient and effective analysis.
Pumps consume significant amounts of energy and most plants have multitudes of pumps. So, prioritizing which pumps to analyze first is crucial for conducting efficient energy assessments. Here are some tips for developing an appropriate shortlist.
Chillers and refrigeration systems often accumulate non-condensables during maintenance. The buildup of these inert substances increases head pressure and thus energy consumption and decreases capacity.
Every energy assessment should target the energy-related utility streams and define the impact cost of each of these utility streams. This calculation should be done using a systems approach.
Boilers require blowdown to control the amount of dissolved and precipitated solids, to ensure reliable and efficient operation. The blowdown stream has thermal energy that can create flash steam and offer other recovery options before discharge.
In continuous processes, analysis of energy-saving opportunities focuses on steady-state operation. In contrast, for batch processes, evaluation requires close attention to cycle time and understanding ramp up and ramp down of the utility and feed streams.
Implementing a good oxygen trim control system on process heaters and boilers can provide significant benefits. Often, it’s easy to manage such an upgrade. As a bare minimum, a plant should consider periodically adjusting the positional control system.
This second column in a two-part series focuses on how to get the most out of the electrical generation portion of cogeneration. It looks particularly at maximizing power from a gas turbine generator by minimizing parasitic losses.
Thermocompressors can be used very effectively to upgrade low-pressure or wasted steam so it can serve a useful plant purpose.
New requirements for existing and new boilers as well as process heaters are prompting boiler MACT (maximum achievable control technology) compliance efforts. Here are tips for conducting energy assessments.
Correlating heat exchanger performance to operating cost or energy savings can be tricky but is very important because it can determine whether an exchanger must be shut down for cleaning or can continue to operate until the next scheduled turnaround.
A periodic energy assessment of refrigeration systems can provide some excellent value and identify low-cost or no-cost energy saving measures.
Hot surfaces of equipment and piping can lead to significant energy losses and pose risks of personal injury. Adding or enhancing insulation and installing refractory where appropriate can boost energy efficiency and safety.
Understanding the fluids used in refrigerant and chiller systems — water, brine, glycol and specialized heat transfer fluids — and their properties is key to energy-efficient operations. Setting up a periodic sampling program and trending results is crucial.
Cooling towers and fin fans are essential process heat sinks that often don’t get adequate attention. Not operating them at optimum levels can impact the energy intensity, throughput and controls on the upstream process.
Compressed air often is the most expensive as well as most misused, mismanaged and wasted utility at a plant. Selecting the most-appropriate control strategy requires evaluation of the system design, load profile and plant demand.
An absorption system can provide chilled water or refrigeration for processes, often by taking advantage of low-temperature heat available on the site. A number of factors influence whether an absorption system is a good fit for an application.
Effectively monitor data to make your plant more energy efficient and reliable
Natural gas turbines with steam generation can produce both electricity and heat. This first of two columns on such cogeneration looks at the heat aspects, particularly how to increase the heat recovery efficiency of the system.
It’s estimated that 10% of steam traps fail each year. So, annual auditing is crucial to minimize steam losses. This column covers three main methods for testing traps, and provides some tips and best practices.
Our archive of past columns contains a wealth of real-world expertise.
Variable frequency drives and steam turbines can be used to vary the speed of equipment. Understanding the system curve or, more importantly, the difference between static head and dynamic head is crucial to avoid problems.
Find out how you fare on some low-key quizzes
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