GE Vernova ROC-HALX Product Cooling System

Vocabulary flashcards detailing the architecture, components, and specific cooling modes of the GE Vernova ROC-HALX turbine based on the technical lecture notes.

Nacelle Cabinet 2 (NC2)

A cabinet measuring $2200 \times 1200 \times 800\,\text{mm}$ that houses Control (MarkVle, Safety PLC), communication switches, ArcFlash monitor, Nacelle & Helihoist lights, and IP Phone.

Pitch system components

Includes $1$ Central Box, $1$ PITCH Auxiliary Box, $3$ Axis boxes, $3$ Ultracaps boxes, and $3$ Motor+brakes.

Yaw system

Consists of $12$ Dive Motors+gears and a YAW Cabinet measuring $2000 \times 1200 \times 400\,\text{mm}$.

Nacelle Cabinet 4 (NC4)

The cabinet that provides power supply for the TC, Slip Rings, YAW, NC3, and the Cooling & Air conditioner system, while housing the input line from the AUX. Transformer.

Air Conditioning System (ACS)

System used to maintain internal air temperature and provide corrosion protection through Humidity Control, Salinity Filtering, and Overpressure generation.

SIEMENS SIMATIC S7-1200

The PLC used for the Air Conditioning System (ACS) which can be accessed via a web-interface using the IP-address $192.168.0.100$.

Generator Cooling System Primary Side

A closed loop system where cold air is distributed $360^{\circ}$ by the stator structure, utilizing $6$ motor fans ($3$ on the left and $3$ on the right heat exchangers).

Generator Cooling System Secondary Side

An open loop system that uses $4$ motor fans to pull cold air from outside the nacelle (close to the blades) to cool the closed loop.

Variable Frequency Drive (VFD)

The device used to control the $10$ fan motors of the Generator Cooling System via Profinet Protocol.

PDIST1

The component that receives $16$ signals from $8$ sensors distributed through the Generator Cooling System before they are communicated to the Mark VI.

Fast Cooling Mode

An automatic generator cooling mode that provides access to the generator within $30\,\text{min}$.

Warm Up Mode

A mode with the goal to achieve a temperature of $10^{\circ}\text{C}$ above the dew point (TSG) after long periods of Idle mode.

Converter Transformer Cooling System

A unified water to air system that dissipates heat losses to ambient air using passive air heat exchangers and a water-glycol coolant mixture.

Slip ring

Component used for Signal Cu-to-FO (Copper to Fiber Optic), communications, and power transfer within the turbine.

HPU

The unit responsible for the rotor brake and locking pin, powered via Nacelle Cabinets 4 (NC4).