Predictive Maintenance to Optimise Operations
Published on : Tuesday 16-06-2020
Sharada Prahladrao reviews a presentation from ARC Industry Forum in Orlando on the benefits of planned maintenance.
At the recent ARC Industry Forum in Orlando, Chris Williams, Global Director of Professional Services, AspenTech, spoke about the realities of implementations of artificial intelligence (AI), machine learning, predictive analytics, and predictive maintenance technologies from the field.Chris began his presentation* by identifying four key components that were reiterated throughout the workshop:
1. The technology that we implement must consider the safety aspect of the people. Instead of rushing into danger to do a repair job, people must have time to collectively plan as a group across the different disciplines.
2. In the planning and execution of the maintenance tasks, the environment must be protected. And, the right things must be done at the right time to prevent major catastrophes.
3. Keeping the assets up and running and constantly improving operational processes.
4. Ensure speed and accuracy.
Challenges of Asset Performance Management
Speaking about the challenges, Chris said that unplanned downtime decreases safety and increases the emissions. It also limits production, driving higher costs, and lowering margins. This pattern is recursive and almost a residual part of the business, and in some cases, we plan for and mitigate quite well, but there's a balance, he added. However, most often we limit our options in terms of mitigation, because our maintenance tasks are reactive. We need to prioritise our resources – to ensure that we have the right people doing the right things at the right time.
The technology is now available, but if it is not integrated with an organisation’s day-to-day business, it will not yield the value. The question is: What's the net benefit of all the tools you've bought and all the money you've spent? APM can be a cost centre or a value generator. It can integrate the technology and business and generate value. There are opportunities, but we need to exploit them. For instance, flared natural gas produces more than 300 million tonnes of carbon dioxide emissions every year – the emissions are equivalent of approximately 77 million cars
driving over your head every year, just from flaring. This is emitted during transient operations, startups and shutdowns; herein lies an opportunity to reduce greenhouse gas emissions and impact day-to-day operations.
Sustainability and Safety
Sustainability is an ongoing effort; unplanned and unexpected incidents still occur. Giving the example of a California refinery event where sulfur dioxide emissions on the day of an emergency shutdown were double that of the prior year, Chris said that the plan and technology were in place, but still things went wrong. As per the Center for Chemical Process Safety (CCPS), process safety incidents occur five times more during startups and shutdowns, he added. With specific reference to the oil and gas sector, Chris said that it is a known fact that planned maintenance improves safety. Because if most of your maintenance work is planned, the level of risk reduces. This was explained with a graph showing that the number of accidents drops dramatically if more than 75 per cent of maintenance is planned. Further, he spoke about instilling a culture of organisational safety and continuous improvement in processes.
You start moving your planned maintenance, so that your people have more time to cross collaborate, understand the root cause and take the right action that solves a problem, said Chris. If you can look across multiple pieces of equipment and processes that are upstream, then you could zero in on the problem area and find the solution. Data is the new oil and we have to gather and harvest as much of that information as possible. So, who does this?
AspenTech’s Solutions
AspenTech’s solutions streamline the selection and preparation of the data builds, using AI, explained Chris. AI technologies are helping organise data, shape outcomes, and present results in a consumable way that enables the best decisions. The data is harvested from multiple sources: your database, other systems, operator walk-arounds, etc. AspenTech’s systems select the minimum set of sensors germane to the particular failure or the particular operation; the regions to be trained and tested on, and the frequency of data needed for analysis. The next step is democratising AI, i.e., democratising the process by collaborating across disciplines. Next, the process engineers, operations and maintenance departments lead us to an enriched data, which can be used and is a value-add. It is the integration of all that work with your domain expertise. Data is what it is, what is needed is human expertise, he said. Democratisation of technology enables involving people in the solution; this helps in tracking and tracing patterns. AspenTech’s solutions identify these patterns and reduce time and cost.
Every industry has different processes and specific requirements. AspenTech takes all these into consideration, builds the ensemble of metadata, and then deploys solutions.
Case Studies
A sampling of some of the predictive maintenance solutions that were successfully deployed across various sectors: Oil and gas: The solution created value by better planning of maintenance activities, prevention of unplanned downtime, and increased process availability by providing up to 45 days advance notice of failure versus traditional predictive methods.
Metals and mining: Saw return on investment in less than six months by reducing unplanned downtime and the need for redundant spare equipment. Petrochemicals (fouling in a furnace): Avoided two days of downtime per furnace per year and avoided losses to the tune of €1.7 million by indicating when best to conduct maintenance versus prior calendar-based tactics.
Wind Farms: The value created – transferable agents for predictive maintenance solution for wind turbines, significant reduction in time and effort to create agents, rapid time-to-value and scalability reducing high risk maintenance tasks.
Cement: The challenge of cyclone blockage in cement kilns was resolved resulting in $1 million in savings by eliminating just 25 per cent of blockages.
In conclusion, Chris said that all companies have the same objectives: maximise productivity, focus on safety and save the environment. There are different ways and different plans on executing that mission, but the destination is the same.
*Chris Williams presentation: https://www.youtube.com/watch?v=mTGspT9VMw8
Sharada Prahladrao is editor and public relations manager at ARC India. She edits ARC's Global Market Outlook studies and co-authors ARC Strategy Reports and Insights. She has the innate ability to understand complex concepts and express them lucidly.
