What payback can we expect from waste heat recovery?

It depends on exhaust temperature, run hours and the steam value it displaces. On continuously running gas engines, a well-designed recovery boiler often pays back within 2–4 years. We quantify this from your actual load logs.

Can you add a waste heat boiler to existing generators?

Frequently yes, provided the exhaust temperature and back pressure allowance suit it. We survey the exhaust route and prime mover limits before design.

How often do heat recovery boilers need cleaning?

Clean-burning gas engines may go 12 months; diesel, biomass and furnace off-gas applications often need quarterly cleaning driven by measured performance rather than the calendar.

← Waste Heat BoilersModderfontein · Johannesburg

Waste Heat Boilers Repair
in Modderfontein

Waste heat boiler repair, maintenance and annual inspection in Modderfontein and the wider Johannesburg area. Same-day response for commercial and industrial plant across Gauteng.

Capacity

200 kW – 30 MW equivalent

Fuels

Recovered exhaust heat (unfired or supplementary fired)

Local Service

Waste Heat Boilers in Modderfontein

Our certified technicians service waste heat boilers across Modderfontein and the Johannesburg region — from hospital and hotel chp heat recovery to gas engine and turbine cogeneration. We carry common burner spares, safety valves and controls for major brands including Cyclotherm, John Thompson, Babcock, Thermax. Annual inspection, combustion analysis, tube cleaning and emergency breakdown response are all available in Modderfontein.

Brands

Waste heat boiler brands serviced in Modderfontein

Cyclotherm
John Thompson
Babcock
Thermax
Aalborg
Bosch

Our Service

What we cover in Modderfontein

Tube bundle cleaning and fouling removal
Bypass and diverter damper service
Feedwater, deaerator and pump maintenance
Performance and heat-recovery efficiency audit
Thickness testing and tube replacement
Controls and steam pressure regulation tuning

Troubleshooting

Common waste heat boiler faults in Modderfontein

Falling steam output at the same engine load+
Likely causes
- Exhaust-side fouling on the tube bundle
- Waterside scale reducing heat transfer
- Bypass damper leaking past
What to check
Compare exhaust inlet and outlet temperatures with commissioning data — a narrowing gap means poor transfer.
When to call us
When cleaning intervals stretch beyond schedule or output drops more than 10%.
Excessive back pressure on the prime mover+
Likely causes
- Severe soot or ash blockage
- Damper mechanism failure
- Undersized or partly blocked ducting
What to check
Measure back pressure at the engine or turbine outlet against the manufacturer limit.
When to call us
Immediately — excess back pressure damages the engine or turbine and can void warranty.
Tube leaks and water carryover+
Likely causes
- Thermal fatigue at tube-to-tubesheet joints
- Acid dew point corrosion at low load
- Poor feedwater treatment
What to check
Watch for unexplained make-up water use and steam quality problems downstream.
When to call us
At the first sign of leakage — a failed tube can flood the exhaust path.

FAQ

Waste heat boiler questions — Modderfontein

What payback can we expect from waste heat recovery?
+
It depends on exhaust temperature, run hours and the steam value it displaces. On continuously running gas engines, a well-designed recovery boiler often pays back within 2–4 years. We quantify this from your actual load logs.
Can you add a waste heat boiler to existing generators?
+
Frequently yes, provided the exhaust temperature and back pressure allowance suit it. We survey the exhaust route and prime mover limits before design.
How often do heat recovery boilers need cleaning?
+
Clean-burning gas engines may go 12 months; diesel, biomass and furnace off-gas applications often need quarterly cleaning driven by measured performance rather than the calendar.

Nearby Areas