Services

Design

We understand within this industry most tenders are not fully designed when pricing is required.

We work with our clients, and consultants using our extensive experience to develop designs which meet specification and regulatory requirements.

AutoCad, Solidworks and Pro-E are all used to design our products by a team of experienced engineers.

Exhaust Systems

Exhaust systems are designed to ensure that maximum engine backpressure requirements are not exceeded.

During running cycle of generators the exhaust system expands and contracts extensively due to high heat of engine exhausts.

Designs of exhaust systems must ensure that expansion has been accommodated using various means within plantrooms, enclosures etc. Break-out noise and vibration from exhaust piping must also be considered during design.

Fuel Tanks

MNJ design and build our own fuel tanks, and procure from trusted suppliers, depending on project requirements.

Tanks range from small plantroom daytanks 500lt -1000lt up to 110Kl bulk storage tanks.

Underground tanks are procured from specialist suppliers and installed by trained MNJ technicians.

Baseframe fuel tanks are a great way to eliminate transfer systems and save floor space.

Fuel Reticulation Systems

A diesel fuel transfer system for generator sets is designed to ensure a reliable supply of fuel to the generator for continuous operation.

Fuel Storage Tank

As mentioned above, this is where the diesel fuel is stored. It can be an underground or above-ground tank, depending on the setup.

Transfer Pumps

These pumps move fuel from the storage tank to the generator's day tank or directly to the engine. They are often electrically driven and may include backup systems for redundancy.

Day Tank

A smaller tank located near the generator that holds a limited amount of fuel for immediate use. It ensures a steady supply to the generator without relying solely on the main storage tank.

Fuel Filters and Separators

These components remove impurities and water from the fuel to prevent engine damage and ensure efficient operation.

Piping and Valves

The system includes a network of pipes and valves to transport fuel between components. Proper design ensures minimal pressure loss and prevents leaks. Our installation team are experienced with the common piping systems used for diesel fuel transfer; Stainless Steel Pressfit and Welded pipes.

Monitoring and Control Systems

These systems track fuel levels, pressure, and flow rates. They may include alarms for low fuel levels or system malfunctions.

Safety Features

Systems are designed to prevent fuel leaks, overflows, and contamination. This includes features like ventilation holes in tanks and anti-static measures in pipelines.

Fuel transfer systems can be very simple, or extremely complex, we are experienced with all aspects and supply and install equipment and piping systems to suit.

Plantroom Acoustic Treatment

Acoustic treatment for a generator room is crucial to reduce noise pollution and ensure compliance with local sound regulations. Generator rooms can be incredibly loud due to engine noise, vibrations, and exhaust systems, so acoustic design is needed to mitigate these effects.

When designing our generator plantrooms, we consider the following factors:

Identify Noise Sources

Mechanical noise: Engine vibrations and moving parts.
Airborne noise: Exhaust, intake, and engine sound.
Structure-borne noise: Vibrations transmitted through the floor, walls, and building frame.

Soundproofing Techniques – Plantroom construction

Use acoustic panels on Walls and Ceiling to reduce with dense insulation (rockwool or mineral wool) behind panels.
Use acoustically-rated doors
Install vibration isolation pads or mounts under the generator.
Consider a floating floor system with damping layers.

Ventilation and Ductwork

In our experience, the most common and reliable way to cool the Generator and plantroom is by using the generator set mounted radiator fan.
This removes points of failure with remote cooling and electric fans etc by using a mechanical driven engine fan.
The air pathways into, and out of the plantroom must be sized accordingly, to ensure the external static restriction on the fan is not exceeded.
Sound Attenuators, Acoustic louvres, weather louvres and lined ducting or a combination of all these items can be used as long as the restriction imposed on the radiator fan isn’t excessive.
The plantroom air pressure shall be balanced as close to atmospheric as possible to ensure the doors are easily openable.
Plantrooms are generally designed at 10deg C temperature rise.

Engine Exhaust Silencers

As outline in item 2, Silencers are to be used in all applications, size location and materials all subject to site specifics and noise requirements.

Acoustic Enclosures

Acoustic enclosures MNJ design and manufacture fall into 3 categories :

Close fit enclosures (CFE)

These are generally fitted to the baseframe of the open genset and offer limited sound reduction and access to service engine via doors only.

These are usually suited to generators up to 850kva with noise levels of 85db(A) and above.

Container Enclosures (CE)

The enclosures are designed around the shipping container sizes and offer greater noise reduction, engine access and fuel options while keeping a lower cost.

There are many variations on these designs such as under-base fuel tanks, extended attenuation, external exhaust silencers etc which we customise to each client project requirement.

Oversized Enclosures (OE)

Oversized enclosures are usually used where generators are over 1500kva and certain project requirements restrict the use of the CE enclosure.

This could be airflows, overall height or length or walkway requirement around generator.

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