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igem news – yppc

COMMISSIONING A HIGH

PRESSURE GAS CONNECTION

MANAGEMENT OF DESIGN, PROCUREMENT, INSTALLATION AND TESTING FOR A 40MWE POWER GENERATION STATION

By Samuel Ezeonyeka, Assistant Project Manager (Gas Connections) of its kind for UKPR and had unique
for UK Power Reserve and YPPC 2019 finalist challenges.
Prior to this project, I had
UK POWER RESERVE (UKPR), part added an environmental improvement to successfully delivered medium and
of Sembcorp Group is a fast-growing all future sites by ensuring our gas skids intermediate pressure gas connections
Midlands-based power company. are housed with an acoustic gas kiosk to over 25 UKPR sites.
UKPR’s gas reciprocating engines use to reduce the noise level with minimal This was my first encounter with
the expansion of gases to drive a piston impact on our surroundings. high pressure gas connections and the
within a cylinder and convert the following section explores my roles
piston’s linear movement to a circular The project and responsibilities, the challenges
(or rotating) movement of a crankshaft to In early 2018, I was part of a team encountered, and the methodology
generate electricity to the grid (Figure 1). tasked with objectives to develop and deployed to resolve those challenges.
These reciprocating engines ramp build a 40MWe power generation
up within two minutes to full capacity station to meet our contractual Roles and responsibilities
of 2MW of electricity per engine. obligations for the 2015 Capacity I report directly to UKPR Head of
Figure 1 shows our typical model Market (CM15). Connections on gas. I manage contractors
site which generates approximately Within the team, I was fully whose roles and responsibilities are
20MW of electricity (20MWe) to the responsible for the management highlighted in Figure 2.
grid at 5000Nm³/h gas flow rate and and delivery of a high pressure gas
52,226kW/h gas load capacity. connection to our site in Derby. This Challenges and solutions
On a daily basis, I am responsible involved a pressure reduction of Key challenges of the project included:
for the on-time delivery of gas at the 38bar (normal operating pressure) to
appropriate volume, temperature and 250/260mbar (required pressure at Temperature At normal operating
pressure to our reciprocating engines. I’ve the engines). This project was a first pressure of 38bar, the inlet temperature

FIGURE 1 20MWE UKPR SITE FIGURE 2 CONTRACTOR ROLES AND RESPONSIBILITIES
DESIGN APPROVAL SECONDARY PRESSURE
REDUCTION SKID
CONNECTING TO FROM 7BAR TO
CADENT’S LOCAL ASSISTANT PROJECT MANAGER 250/260MBAR
TRANSMISSION SYSTEM (GAS CONNECTIONS)
(LTS) AT 38BAR

CADENT + NATIONAL CNG SERVICES LTD/ FUTURE UTILITY FUTURE METERING
GRID METERING GAS UNIE SOLUTIONS SERVICES

PRE-HEATER MODULE & DOWNSTREAM 7BAR IP
PRESSURE REDUCTION PE & ST GAS PIPE
STATION FROM 38BAR
TO 7BAR
FIGURE 4 PRE-HEATER MODULE INSTALLED AT DERWENT

FIGURE 3 THROTTLING THROUGH A POROUS PLUG

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