A report for Surrey County Council on Quadrant Court detailing actions to save energy

1. Surrey County Council – Quadrant Court
Proposal for a
Improvements in energy performance
At
Surrey County Council
Quadrant Court, Woking
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2. Surrey County Council – Quadrant Court
Surrey County Council Project Ref: Q0030297/KBR
County Hall Date- 18/01/2011
Penrhyn Rd Project: - Opus II
Kingston upon Thames,
Surrey
KT1 2DN
Dear Sir,
Under this proposal we will examine and report on the use of the building, quality of
existing services and equipment, architecture and tenant use.
We will offer savings and identify specific issues where tCO2 can be reduced.
The report is the basis upon which we can plan the actions required against any
capital expenditure required to achieve them and will suggest a period of payback for
each activity.
Yours sincerely,
Kieron Ryan BSC Hon MIET
Energy and Control Systems
Mob: 07970 615856
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3. Surrey County Council – Quadrant Court
Schedule of Contents
EXECUTIVE SUMMARY.................................................................................................4
Lighting 10% saving year on year....................................................................................................................4
..........................................................................................................................................................................4
Boilers and associated plant 15% saving year on year...................................................................................4
Chillers and associated plant 15% saving year on year..................................................................................4
Fan coil units: (FCU above ceilings) 10% saving year on year......................................................................4
Re-Commissioning Existing Controls Costs.....................................................................................................5
EXISTING SYSTEMS .............................................................................................................................................7
Lighting Controls...............................................................................................................................................7
The Building Controls Network........................................................................................................................7
LTHW (Low Temperature Hot Water).............................................................................................................7
Chiller (CHW)...................................................................................................................................................7
Fan Coil Units (FCU).......................................................................................................................................7
OBSERVATIONS ON THE DAY.................................................................................................................................7
Lighting..............................................................................................................................................................8
Integration.........................................................................................................................................................8
Human Factors..................................................................................................................................................8
Airside System...................................................................................................................................................8
Chiller................................................................................................................................................................8
Incoming Voltage Regulation............................................................................................................................8
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4. Surrey County Council – Quadrant Court
Executive Summary
Surrey County Council, Quadrant Court, Leatherhead.
Lighting 10% saving year on year
Fitting of the PIR shields will allow the lights in unoccupied rooms to be disabled, if
this where integrated in the BMS a further saving can be achieved.
Boilers and associated plant 15% saving year on year
Correct demand matching will achieve reasonable reductions with minimal outlay.
Chillers and associated plant 15% saving year on year
Correct demand matching will achieve reasonable reductions with minimal outlay.
Fan coil units: (FCU above ceilings) 10% saving year on year
Developing a thorough understanding of the buildings use will leverage Fan coil
energy savings; this would form part of the re-commissioning process.
Remote monitoring and energy management will leverage another 10-15% across the
board. This is because we remotely analysis and observe systems in operation, lock
in setpoints and maintain the most effective solutions to specific and identifiable.
However, in order to achieve this integration of the lighting systems would be
required.
1. In order to maximise on energy savings we can offer the following services.
2. Installation of an ADSL modem allowing full remote access from anywhere in
the world. Installation of a suitable network to collect data from the sub-
metering.
3. Download the core code in each controller and examine for potential savings.
4. Continuous collection of additional data from the BMS and the sub metered
systems for detailed analysis and identification of downstream energy usage.
5. Lockdown and maintain carbon footprint through continuous monitoring and
alarming of setpoints and onsite activity.
6. Your access to any system based around the Trend products can be achieved
via the existing head end , further sites can be added using the existing
1
software and this will allow you to use a single interface to any site in your
portfolio.
Incoming Voltage Regulation
Incoming voltage regulation should be considered as an additional and separate
project.
1 The existing PC in the FM offices
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5. Surrey County Council – Quadrant Court
Proposals Costs
Generally the controllers are in excellent condition requiring no modifications to the
hardware.
Re-Commissioning Existing Controls Costs
Re-commissioning of the existing controls; nominally 3 weeks work,
implementing, best achievable performance installation of remote monitoring
hardware etc
Initial survey to establish detailed scope £XXX (1 day)
Will be deducted from an order to complete the works.
Re-commissioning of main plant £XXXX (3 weeks)
Pressurisation units, pumps, boilers, chillers, fan coil units. Provide report
regarding any new information revealed by this activity.
Remote plant monitoring 24/7/365 £XXXX (per year)
This work is monitoring only, on the existing equipment and therefore the
Lock down service can not apply.
Some degree of energy monitoring is achievable with changes being
implemented by attending site as and when agreed.
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6. Surrey County Council – Quadrant Court
Notes
Intentionally left blank.
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7. Surrey County Council – Quadrant Court
Energy Report
Existing Systems
The primary existing systems are: -
Lighting Controls, LTHW (Low Temperature Hot Water), Chiller (CHW), Fan Coil Units
(FCU).
Lighting Controls
The lighting system consists of a Philips Lightmaster intelligent lighting system,
consisting of a PC interface, network architecture, power architecture, lighting
modules, PIRs, local lighting level sensors and exterior lighting sensors.
This provides the foundation for a very powerful tool for energy savings.
The Building Controls Network
The BMS (Building Management System) is a current generation Trend IQ3
system consisting of a PC interface, network architecture, 4 off IQ3 controllers
and IO modules (input output modules), sensors, actuators, switches and
inverters as required to operate each piece of equipment.
This provides the second very powerful tool with which to implement energy
changes.
LTHW (Low Temperature Hot Water)
The heating system consists of 4 off boilers (220Kw each), primary (5.5Kw)
and secondary pumps (15 Kw, VT circuit) and subsidiary circuits. We did not
observe a CT circuit system.
Chiller (CHW)
Consisting of 2 off chillers, 2 CHW pumps (22 Kw approx) and subsidiary
circuits.
Fan Coil Units (FCU)
The FCU and perimeter heaters operate similarly in that each unit is fitted with
heating and cooling valves a dedicated controller and are networked together
to facilitate the formation of groups controlled be a single setpoint and
amalgamated sensor values.
Observations on the Day
This building, originally handed over in 2006 is, as one might expect in
excellent condition. The controls for both lighting and M&E services are of a
modern and well thought out design, balanced against capital expenditure.
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8. Surrey County Council – Quadrant Court
Lighting
There are some aspects that should be investigated in order to maximise
energy savings and these are: -
Integration of the lighting PIRs to the BMS, this would allow the HVAC
systems to be shut down when the rooms are not used.
Integration
Inverters already connected to the BMS can be used to collect energy
information about the activities of pumps and motors. Particularly as these are
already being modulated to meet some need.
Human Factors
The lighting PIRs should be fitted with range limiting shields, available from
Philips. This will prevent the activation of the lighting modules from activities in
the corridors.
Airside System
Air supply plant in some areas in looking somewhat untidy, but generally
remains in excellent condition since 2006. Access to some of these areas is
restrictive and as such additional H&S aspects must be considered.
Chiller
As the building is only 3 years old the chillers have a long life expectancy
before we can consider any investment in hardware, however there is room for
improvement in the supply of CHW at unnecessarily low temperatures with
respect to ambient conditions.
LTHW
As the building is only 3 years old the boilers and pumps have a long life
expectancy before we can consider any investment in hardware, however there
is room for improvement in the supply of LTHW at unnecessarily high
temperatures with respect to ambient conditions.
Demand Control (boilers and chillers)
Some opportunities exist for addressing the issues of demand by using the
local sensors on FCU and perimeter heating, loop temperature sensors and
return air in order to optimise the demands placed on the M&E services.
Submetering
The sub-metering mounted on the main incoming switch is not used to collect
information; this worthwhile investment will assist in the identification of high
energy use areas around the building
Incoming Voltage Regulation
The relatively new technique of incoming voltage regulation offers further
savings. The device regulates down stream voltage to optimise power
consumption. In general the claims of 20% are generous whilst a realistic
saving of 10% - 15% is easily achievable.
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