8.4-capacity-increase-6-c0abea5581980d62.pdf

This technical report excerpt details the requirements for a 10% capacity increase at the Hendrina Power Station. Key recommendations include the modular replacement of economizers, upgrading turbine auxiliaries (condensers, H2 coolers, and air ejectors), and replacing the aging MV motor fleet. The report highlights that while some electrical systems can handle the increase, others require specific interventions to ensure safety and legislative compliance with the Air Quality Act.

• A modular replacement of the Unit 6-10 economizer is projected to have a payback period of less than 10 years based on revenue lost due to Boiler Tube Leaks (BTLs), while also reducing normal maintenance costs.
• To support a 10% capacity increase, several turbine auxiliary components require replacement or upgrades: condenser tubes must be replaced with titanium and anti-vibration clamps; new H2 coolers are needed to dissipate 2186 KW of losses; the air ejector system should be increased by 15%; and new lube oil cooler tube nests and shells are required.
• The existing MV motor fleet is recommended for replacement regardless of capacity needs because most units are 40 years old, exceeding their 20-year economical design life. Increasing the power ratings for a 10% capacity increase is estimated to cost approximately 5% of the total MV motor fleet cost.
• Certain electrical infrastructure can support a 10% capacity increase with minimal or no additional cost, including auxiliary transformers, MV cables (though EFP motor supply cables may need verification), and bus ducts, provided recommended maintenance is performed.
• Legislative compliance under the Air Quality Act necessitates the installation of sulphur reduction plants and Low NOx burners.
• The report identifies significant safety risks associated with piping failures: main steam piping failures pose a threat to life due to the immense energy released, and flue ducting failures can cause lengthy downtime and are harmful to personnel.

APA

Centre for Environmental Rights (n.d.). 8.4-capacity-increase-6-c0abea5581980d62.pdf. https://cer.org.za/wp-content/uploads/2017/07/8.4-Capacity-Increase-6.pdf?x21779

Chicago

Centre for Environmental Rights. 8.4-capacity-increase-6-c0abea5581980d62.pdf. n.d. https://cer.org.za/wp-content/uploads/2017/07/8.4-Capacity-Increase-6.pdf?x21779.

Wikipedia

{{cite report |author=Centre for Environmental Rights |title=8.4-capacity-increase-6-c0abea5581980d62.pdf |url=https://cer.org.za/wp-content/uploads/2017/07/8.4-Capacity-Increase-6.pdf?x21779 |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{centreforenvironmentalrightsnd84capacityincrease6c0abea5581980d62pdf, author = {{Centre for Environmental Rights}}, title = {{8.4-capacity-increase-6-c0abea5581980d62.pdf}}, institution = {Centre for Environmental Rights}, url = {https://cer.org.za/wp-content/uploads/2017/07/8.4-Capacity-Increase-6.pdf?x21779}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }