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Capital Echo

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Edward Murphy

on 28 April 2014

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Transcript of Capital Echo

The Little Green Book
Beneath the veneer energy use was poor
Building meets its sustainability targets
Fit- Out Low Embodied Energy
Stakeholder Sustainability
BREEAM Very Good Achieved
Beauty is sometimes only Skin Deep
Fit-out included:

Interface carpets through out. Interface now removed 90% of carbon from there products. 100% of water is recycled

All timber FSC sourced

All lighting presence detection controlled

Fan Energy reduced to less than 0.6W/litre delivered

Fridges and water cooler zero GWP

Developer had already refurbished a number of floors before our client occupied the building
On the face of it the proposed refurbishment looked to be very high quality Cat A but with retained AC systems
Our client required upper quartile EPC which set it at Band C at 64
Our investigations revealed this could be a difficult ask for this building.
Monday, April 28, 2014
Vol XCIII, No. 311
Retro-fit Yields Massive Operational Savings
How £1.50/ft reduced running costs improved marketability of the building
Could Reduced Services Charge improve attractiveness?
The Capital Building was constructed in 1974
By Royal and Sun Alliance.
Reputed to have been a "brutalist" movement response to Royal Liver Building
Architect was Tripe Wakeham Partnership
Structural Engineers were Bingham Cotterell now part of Mott macDonald
Purchased by Downing for £51M and refurb of £15 Million in 2009/2011

The Capital Echo
Developer ruled out change but MM saw an opportunity
Existing AC system was a high velocity constant volume terminal reheat system.

Cost Constraints mean AC systems retained
EPC goes from 64 to 55 overnight
Something Clever about existing slot windows
Light floods in
Despite brutalist exterior with narrow slot windows light still floods in.
Modelling of daylight shows that it should be gloomy
Building is future-proofed in against 2018 legislation
Early Modelling sets up change strategy
Thermal Modelling Paves the Way
Allows us to model original and retrofitted building and its systems

Then compare energy savings that could be realised if a
four pipe fan coil
retrofit was implemented
Sketch up model
Major Performance Improvement from Internal Refurbishment
Annual Heating and Cooling Trace
Building Energy Split
Comparison of AC Energy (Mwhrs/a)
Building Energy kwhrs/m2
85% Reduction
35 MPH Air at 16 to 19C onto Floor Plate
Damper Box Slows Air Down to 10 MPH
then heater warms it up to 20C to 35C
Fast Return back to AHU at 24 t0 26 C
Calcs suggested that first row of luminares could be daylight controlled
"As designers we always need to keep asking ourselves, if we hand over our low carbon design to the client
.... will it still be low carbon once they begin to operate it

Stakeholder Engagement and Post Occupancy Engagement is a whole other Planet..... but increasingly vital.
Thank You
Tweet : @edwrdmrphy8
Home of Liverpool Echo Newspaper
New Fan Coil Layout (Taken from Installation Drawings)
Predicted Energy Profile for whole Year (Level 7)
Full transcript