Mall Corporation - Maidstone
The new 19XR5050 chiller has now been running without problem since early 2007 and has now reached An approximate run time of 3100 Hrs (Jan 2008). Addition work to the BMS and Control systems has now refined the condenser water temperature, cooling tower operation and chilled water distribution allowing additional operational savings to be made by the client.
Click photos to enlarge
Chiller Replacement Work - Wells Street - London - W1
Chillmech Engineering Staff have successfully replaced a 'York' YCWA 5HE 180 Air Cooled Liquid Chiller located at roof level of a commercial office complex in 'Wells Street' ( Oxford Street ) London W1.
The existing York Chiller was installed in 1994 and provided approximately 630 Kw of cooling to various fan coil units and Air Handling Units within the Building.
Two new 'Carrier' 30RB342 'Aqua Snap' Air Cooled ( Multi Scroll Compressor ) Chillers were selected to replace the 'York' Chiller with. Each of the new units has a Nominal Cooling Capacity of approximately 325 Kw.
Click photos to enlarge
Work was undertaken during the winter period to minimum disruption and discomfort to staff within the building. In order to meet stringent noise levels in this area of London the New Chillers were provided with 'Inverter' Control of all condenser fan motors and all compressors have been enclosed within acoustic housings. The new Chillers now provide the efficient and economical usage required by the client while minimising the noise output.
Approx value of work undertaken: £120,000
Commissioned: April 2006 and handed over after 1st Year to client in May 2007.
Chiller Replacement Work - Southampton Marina
Frequent failures and expensive repair bills on existing 'Trane' LCGAE 207 Air Cooled chillers located at a prestigious office complex in the 'Ocean Village' area of Southampton Marina called for swift replacement work to be carried out. Click photos to enlarge
Click photos to enlarge
Within a very short time our Engineers De-commissioned both of the Trane CGEA Chillers ( approx 160 Kw each ) and replaced them with 2 x Carrier 30RA160 'Aquasnap' Air Cooled Chillers. Each providing 167 Kw of Cooling to the building. The Majority of the replacement and cranage work undertaken during just one weekend with final commissioning taking place just 4 days after.
The roof area on this site was particularly confined and the introduction of the new 30RA Chillers enabled additional service and air space around the equipment to allow on-going maintenance and upkeep of the Chillers. The ultra quiet and efficient 'Flying Bird' condenser fans on the new chillers also helps to push the heat rejected from the equipment out through the roof support gridwork
Additional work was required to replace DX cooling circuits to the 'Fresh Air' Air Handling unit and various other Split Systems was also undertaken at the same time to enhance the entire building.
Commissioned: August 2006
Project Value: Approx £ 117,000
Mascalls School - Paddock Wood - Kent
A new 'Art Exhibition Centre' has recently opened to the public within the Mascall's School Grounds. The new Art Centre is built on the site of the old school music room which was demolished to make way for this purpose built accommodation for an ever increasing array of art exhibitions.
Many of the Art Exhibitions require that the room is conditioned to provide a constant minimum temperature of 20 oC and a Humidity level of approx 50% RH. To meet these general demands Chillmech Limited installed a 'Trane' WSH 060 Rooftop Package 'Heat Pump' complete with all necessary insulated ductwork, internal air grilles and fresh air intake. Click photos to enlarge
Click photos to enlarge
An internally mounted electronic temperature / time controller is responsible for maintaining a steady room temperature 24/7 and the adjustable 'Fresh Air' intake helps to maintain a fairly steady humidity level.
The new Package system is capable of approx 20 Kw of summer cooling to the Building via four ceiling mounted diffuser grilles. Heating for the Winter period is provided via ' Reverse Cycle' Heat Pump operation and this enables up to 21 Kw of heat to be introduced.
Obviously the new system needed to be as quiet as possible and noise was reduced to a minimum by using larger than necessary supply air ductwork and air supply grilles. The return air is recovered from low level within the exhibition Centre and returned back to the roof package unit by using internal bulkheads and void spaces. The system works very peacefully.
Local media attention pulled in more than 3,500 visitors during the first three exhibitions including many educational visits from across the region. The gallery visitor's book is now brimming with compliments describing Mascalls Gallery as "Paddock Wood's little gem", "full of visual wonders" and curating exhibitions of "stunning work".
Total cost of all A/C and Ventilationwork: Approx £ 18,000
Commissioned during: September 2006
The Royal National Theatre - Southbank - London
As part of an on going replacement and energy saving drive by the Royal National Theatre, an Existing 1976 'Carlyle' Air Handling Unit serving the 'Front of House' area has recently been replaced with a new ECE modular 'Inverter' Controlled Air Handling Unit. Click photos to enlarge
Click photos to enlarge
The new AHU was specifically designed to accommodate a new type of 'Adiabatic' Type Humidifier which is being tested as a low energy alternative solution in place of previous 'Steam Type' ( Vapac ) - electrode steam generators. Initial results for the Humidifier section alone have shown that the electrical savings made between July and December 2007 are a fraction of the normal cost.
An equally sized steam humidifier would have operated at approximately 30 Kw power consumption on full load wheras the adiabatic equivalent requires only 900 watts ( at full load ) of electrical consumption. The only small drawback is that the new humidifier requires much more water flow to maintain the correct humidity and frequent cleaning of the wetted filter pads and drain tray.
Chillmech Limited worked closely alongside 'Walter Meier Ltd' ( Axair Climate Ltd ) engineers on this project to enable the fitting of their 'Condair' SH2 Adiabatic Humidifier unit. The Fitting and Control of the new system was made efficiently and quickly, the system is now connected to the RNT BMS 'Trend' System and allows 10% to 100% of humidity control to be maintained.
The new AHU Commissioned during July 2007.
Total Value of this project approx: £48k
Swansea - Vrv System
Chillmech Engineering staff have installed and commissioned a new 'Daikin' VRV111 ( Variable Refrigerant Volume ) 'Heat Pump' Comfort Cooling system into a commercial building in Swansea - Wales. The installation will help to combat the very high temperatures experienced within the building between May and September each year and also to provide a more economical heating system for the winter period.
The building was previously heated by individual wall mounted electric panel heaters which were extremely inefficient and costly to run. The new system only uses a third of the electrical power to provide the maximum heat needed. Suffice to say all wall mounted electric heaters have now been removed. Click photos to enlarge
Click photos to enlarge
The installation of the new A/C was made even more complicated in that all services had to be surface run inside trunking which therefore involved nearly all 'Out of Hours' working so that none of the office staff were prevented from undertaking their 'Day to day' business.
The completed system comprises of a Daikin RXYQ8P and RXYQ10P size outdoor condensing unit which are connected to approx 26 various size indoor units.
A remotely adjustable DCS601 Intelligent Touch Controller is installed to provide full control to the equipment. The system is monitored via BMS open protocol software from the clients Head Office in London.
Total value of all work: Approx £ 90k
Commissioned during Late 2006.
Mall Corporation - Maidstone
part of a continuing refurbishment and replacement schedule
for the Shopping Centre Management, Chillmech Limited have replaced
one of the original ( 1976 ) Carrier 19EA8583DN ( R12 ) Centrifugal
Liquid Chillers located in the Main Plant Room with a new generation
19XR5050 Carrier centrifugal chiller which uses an environmentally
acceptable R134a refrigerant. The original chillers have been
operating and very reliable since commissioning in 1976 but
they rapidly approach the end of their useful working life.
Centre Relies on a constant supply of Chilled water to the Mall
Areas, shops and offices to maintain the working environment.
During peak summer ambient temperatures a total cooling demand
of approximately 3000 Kw is required to maintain conditions
within the Centre. The replacement work has been completed ahead
of the 2006 summer season so that cooling can be relied on by
the Shoppers and Management of the Centre during the forthcoming
of the hardest tasks during the replacement work was removing
the old cooler/condenser shell of the original 19EA chiller
from within the plant room. This weighs approx 7.5 Tons and
eventually had to be cut up on site before transporting the
sections through the loading bay doors.
new chiller is expected to be more efficient than the original
chiller and Chillmech 'On Site' Engineers will be closely monitoring
electrical consumption for the new machine in 2006 to enable
us to identify actual cost savings to the client. A short delay
in delivery of the chiller to site was created by the specialist
3.3Kva ( 3300 volt ) motor which runs the compressor section
as this had to be specially made by 'Carrier' at their US manufacting
Value of work approx £ 250k
Ltd have been succesful at winning a significant contract at
'The Department for Education and Skills' in Westminster - London.
During August 2005.
contract involved the planned replacement of all 'Service Pumps'
within the basement levels of the building and was undertaken
over a period of 16 weeks and finally completed ahead of schedule
at the end of December 2005.
involved replacement of heating Pumps, Sump Pumps and Booster
Sets within the basement plant rooms and the Project needed to
be undertaken without any disruption to the building. The Booster
sets were purpose made by Manufacturer 'New Haden Pumps Limited'
and all three replaced over just one weekend which included the
entire replacement of all electrical cables, pipework connections
and pressure vessels. Water Services were restored to the building
before 5pm on Sunday evening.
total value of all work carried out exceeding £250k
19th 2005 saw Three Carrier 30RA240 air cooled liquid chillers
being lifted onto the roof of a PWC Plc Building in Farringdon
Street - London.
The installation involved the removal of three existing YORK
AWHP 90 Heat Pumps, all associated pipework and electrical services
before the new chillers were able to be positioned onto the
prepared bases and piped up to the existing chilled water headers.
of the new chillers will provide a nominal cooling duty of approx
252 Kw for cooling the 7 heavily occupied floors of this building.
This work completes a 3 year structured replacement of all chillers
in the building which now totals NINE x 30RA240 chillers in
all at a total cost of around £500k
client has been very happy with the new chillers and their ability
to control the leaving chilled water at 7 oC has made the performance
of the other equipment in the building far more efficient. Reliability
of the new 'Carrier' equipment has seen only one problem within
the last three years ! and this has been a failed condenser
fan motor, which was quickly replaced under warranty by 'Carrier
Engineering team are responsible for ongoing project work for
replacement of some of the older 'Carlyle' Air Handling units
at the Royal National Theatre - Southbank - London.
work has involved the removal of a ( 1976 Year ) Carlyle Air
Handling unit from one of the internal Plant Room Areas. The
work could only be undertaken during nightime and weekend periods
to minimise any noise disturbance to Matinee or Rehearsal Performances
within the Theatre Areas of the Building. Once the old unit
had been removed in sections by our engineers it was replaced
with a new ECE modular System which included inverter motor
control, Humidifier unit, cooling and heating sections.
new Air Handling unit has vastly improved air quality to one
of the larger Rehearsal Rooms and along with several ductwork
revisions has now also improved air distribution within the
same area. The new system enables the best possible use of 'Free
Cooling' by using outside fresh air to the room before any cooling
is provided by mechanical means.
Press Release for new 'Carrier' 30HXC260 chillers installed
in Department for Education and Skills - Westminster - London
of Installation: May 2004 through to September 2004
H + V News - 23rd April 2005
of work: £ 441,000.00
four 'Carrier' Global chillers in a B2 level basement plant
room with only a standard doorway for access called for what
Michael White, Managing Director of Chillmech Limited, describes
as "keyhole surgery"!
the original R22 reciprocating chillers were installed in the
basement of Sanctuary Buildings, around 20 years ago the plant
room was built around them. Replacing them involved complex and
careful planning to ensure that the 8-storey building, home to
the Department for Education and Skills, was never without cooling
during the working week. It was also important that noise levels
were kept to a minimum so as not to disturb ministerial meetings
that take place in the building.
that's where the keyhole surgery came in" says Chillmech's
MD Michael White.
allow access, a hole measuring 1.5m2, the largest possible because
of surrounding obstacles, was cut into the plant room wall.
The original chillers were then dismantled one by one and together
with associated piping were removed through the hole. The floor
surface in the plant room was then prepared and the first two
Carrier units, each measuring 3.9m long, 2.1m high and 1 metre
wide were taken in piece by piece and reassembled within the
plant room, together with chilled water pipe work, electrical
services and a BMS interface module. After these first units
were installed and commissioned, the exercise was repeated with
the second pair of chillers.
new chillers supply chilled water to 1320 fan coil units within
the building and rooftop air handling plants to maintain comfort
for the 1800 people working within the building.
chillers installed at the
ITN Headquarters building in
news, October 25th 2003
Dealer of the Year
2003 UK Sales Conference
White, Director and Co-owner of Chillmech Limited received the
prestigious accolade of Carrier Air Conditioning Dealer of the
Year 2002-3, at this year's Carrier Dealer Conference, held recently
at a medieval manor near Stratford on Avon. The Award was presented
by David Appel Managing Director of Toshiba Carrier UK Ltd.
the Award for his company's record sales of Carrier equipment
Michael entered into the spirit of the event by accepting his
nomination as 'King for the day' and then presided over an entertaining
medieval banquet -during which my lord Tyson was punished by the
Master of Ceremonies for his truculent attitude!
Limited who are based in Paddock Wood, Kent was founded in 1976,
and bought by its current directors in 2000. It specialises in
providing its clients with a comprehensive package for new or
replacement Chillers and has undertaken installations directly
for GlaxoSmithkline plc, Price Waterhouse plc, and ITN to name
a few. Michael White said, "We have been growing steadily
over the last four years and we are delighted to achieve this
Issue 3 - 1999
supplies the full range of
Carrier equipment. Known as a
heavy equipment dealer, the
company specialises in higher
capacity centrifugal and large
water chiller projects"