The air supply pipe, bearing code number K 81134, is a strategically designed conduit that facilitates the delivery of air to the exhaust bends K 81132 and K 81133 in the ZV40/48 diesel engine. This component ensures proper airflow regulation, promoting efficient exhaust gas recirculation and combustion. Crafted from high-quality materials to resist corrosion and thermal stress, the air supply pipe maintains optimal airflow under high-temperature conditions, contributing to better engine performance and reduced emissions. Its effective design aids in maintaining consistent pressure levels and operational stability throughout the engine’s exhaust system.
The two-part ring, designated by code number K 81140, is a crucial sealing element in the exhaust piping system of the ZV40/48 engine. Constructed in two segments for ease of installation and maintenance, this ring ensures a secure and leak-free connection between exhaust pipes. Engineered to withstand high temperatures and vibration, it plays a critical role in maintaining exhaust system integrity, preventing gas leaks, and optimizing backpressure for efficient engine operation. Its durable construction and precision fit make it essential for reliable exhaust management in demanding maritime and industrial environments.
The guide sleeve, marked with code number K 81161, is a vital component in the mechanical assembly of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. This precision-engineered sleeve is designed to provide accurate guidance and alignment for the guide element, ensuring smooth and controlled movement of interconnected parts. Made from robust, wear-resistant materials, it maintains optimal clearance to minimize friction and mechanical stress during engine operation. Its reliable performance contributes to the overall stability and efficiency of the engine, making it indispensable in high-performance industrial applications.
Author: Dr. Nenad Končar, M.Sc.Eng.
Date: May 2, 2025
After the historic power grid failure that affected almost the entire Iberian Peninsula on April 28, the president of the Spanish transmission system operator, Red Eléctrica, Beatriz Corredor, addressed the public with a message: “It won't happen again.”
It was a statement that, understandably, was intended to instill confidence in the system and its experts. But how can we interpret this statement from a technical perspective?
Rapid Response – A Reason for Praise
Red Eléctrica indeed demonstrated a high level of operational readiness. By 4 a.m. the following day, 100% of substations were back online.
This is an exceptional technical and organizational achievement and should not be underestimated.
In complex and interconnected power systems, recovery speed is crucial — and Spain passed that test.
But What Do We Actually Know About the Cause?
In the same address, the REE president emphasized that the cause of the failure has not yet been determined.
If we do not know exactly what caused the cascading outage, then — with due respect — the statement “it won’t happen again” is more of an expression of hope than a fact-based assurance.
As one of the world’s leading experts on grid stability once said: “Zero risk does not exist.”
The Role of Oscillations and Reduced Inertia
Data released by independent grid monitors show that voltage oscillations of increasing amplitude occurred in the hours leading up to the outage.
This is often a sign of declining grid inertia — the physical stability provided by large synchronous generators.
As Europe transitions to renewable energy, that natural stability decreases, and the need for active regulation increases.
Can We Do More?
Yes. Instead of relying solely on hope, the technical community increasingly advocates for:
“It Won’t Happen Again” with Proven Technical Solutions
Long-term grid security is based on investments in technologies that can respond quickly, flexibly, and predictably.
The statement “it won’t happen again” will best be validated if it is accompanied by concrete measures.
Because the future of the grid cannot be secured by statements — but it can be secured by technology.
From System Restart to Long-Term Resilience – Lessons and Solutions After April 28
Author: Dr. Nenad Končar, M.Sc.Eng.
Date: May 2, 2025
What We Know – And What We (Still) Don’t Know
Three days after the largest power grid collapse in the history of the Iberian Peninsula, the causes are still not officially confirmed. However, reactions have already started:
What Actually Happened?
In just a few seconds, 15 GW "disappeared" from the grid.
Consequences:
How Was Spain “Reignited”?
The power return process took 6 to 10 hours – some sources say even longer.
Experts from Euronews and DW explained that it involved a black-start procedure, a complex process without which the recovery would have taken days.
Where microgrids and battery backups operated – everything worked seamlessly.
Solution: Decentralized Resilience Through Batteries
All relevant sources, from Bloomberg analysts to Grid Engineering associations, agree on one thing:
Strong battery storage systems are key to future stability.
Why?
What Does Adriadiesel Offer?
As one of the leading regional providers of battery storage systems, we offer:
What’s Next?
Spain may eventually reveal the cause.
But Europe must answer how to prevent consequences next time.
The key question is no longer what went wrong but what was not ready.
Contact
Adriadiesel collaborates with utilities, cities, and private operators:
The energy of the future is not just green – it must be resilient.
Time for smart systems before another blackout strikes.
The SERTO connecting nut, marked with code number K 87163, is a precision-engineered fitting used to securely join fuel piping in the ZV40/48 engine’s fuel delivery system. Manufactured to tight tolerances, this nut ensures leak-free connections even under high pressure, preserving the integrity of the fuel line and minimizing fire risk. Its compatibility with SERTO’s compression fitting system allows for quick installation and reliable sealing. A critical component in maintaining fuel system efficiency, the connecting nut supports safe, continuous engine operation in demanding environments.