Rail Gourmet, Euston Station

Project Name: Rail Gourmet / Network Rail Property / Spence
Location: Eurostar facilities, Euston station, London

Description

  • The building is a portal steel frame clad structure constructed within a closed area above Euston station, previously occupied by royal mail, now designated “the parcel deck”
  • The building was designed for catering provider “Rail Gourmet” to enable them to store and process both fresh and fast foods for distribution by attended trollies on main line train services out of major London stations.
  • The building also provides full cleaning facilities for both the food distribution utensils, crockery and the catering trollies by means of a specialist automated trolley cleaning machine.

Refrigeration (Searle / Danfos)

  • The building houses several storage, holding and preparation areas for fresh food, these designated areas were provided with nine number “Searle” wall hung evaporators, coupled to “Danfos” external condensers.
  • Each evaporator was equipped with a designated condensate pump transferring condensate to existing high level station drainage.
  • The practicalities of the tenants operational system was problematical to maintaining correct cold room temperatures as the tasks performed by staff were a continuous cycle allowing external warm air from the trolley wash areas to infiltrate the holding areas and conversely allowing cooled air to escape. Aura construction liaised with the tenants management team, and a series of curtain air locks and staff education implemented, a good working solution prevailed and all the tenants requirements were met.
  • All units were installed and commissioned by aura construction engineers, and cold rooms on completion maintained a set temperature of 3c.

Air Conditioning (VRF Mitsubishi Electric)

  • The building houses several administrative offices and staff break out areas, all these locations were provided with ceiling cassette / high wall ac units, the systems were served from two external condensers.
  • All units were installed and commissioned by aura construction engineers, and to the satisfaction of both the incoming tenant and Network Rail Property & retail.

Ventilation (Main Areas)

  • Ventilation to both the trolley wash area and administrative block was provided by a gas fired roof top AHU by “York” from this unit tempered air was distributed around the building in thermally insulated galvanised duct work.
  • The ventilation system was configured to provide a controlled heat recovery circuit with automated air quality monitoring, with manual override from main control panel.
  • The distribution within all areas was by ceiling mounted supply diffusers and ceiling mounted return air grilles.
  • Due to the AHUs necessity to be mounted within a building structure, the allotted roof penetration for flue gas discharge was remote from the AHU site and therefore aura construction designed and fitted a flue boost system incorporating a specialised booster fan inter-locked with the burner controls, discharging into a stainless steel twin wall flue suspended from the building structure to designated exit point in roof to allow safe discharge of gas exhaust.
  • The entire AHU and ducting installation works were carried out by aura construction engineers with specialist commissioning engineers employed for the AHU commissioning and air balancing.

Ventilation (general)

  • Within the building were several toilet blocks and general storage areas, these areas were fitted with localised ventilation systems comprising inline fans coupled with matched attenuation with distribution via galvanised duct work.
  • All general ventilation systems were either under the dictate of the building control system or energised via light switch operation with run on timers.

Domestic services

  • The central complex was provided with hot and cold services to WC blocks, sinks, trolley wash machine, industrial dishwashers, and localised wash down points. Remote and back of house areas were provided with point of use electric water heaters.
  • The main hot water circuits were provided with softened water provided from a “Lowora” duplex water softener
  • The main hot water services were provided from a “Hamworthy” direct gas fired water generator mounted within a purpose built plant room adjacent to the building. This unit was fitted with a “Hamworthy” fan assisted flue system coupled to a stainless steel twin wall flue discharging to atmosphere via main building opening.
  • All the hot water feeds were provided with a secondary loop to provide constant hot water at all outlets, with blending stations at all WHB outlets.
  • Due to the trolley washing machine requiring high volumes and pressure, the water services necessitated the inclusion of a booster pump which provided boosted water to both the trolley wash and all other areas, with pressure reducing sets at outlet points as required. The booster pump was provided with automatic run and stand by functions, coupled with duty sharing, to ensure continuity of supply.
  • The main incoming cold water feed was via a storage tank mounted above the boiler plant room, this tank providing a 12 hour back up in the event of water stoppage.
  • The water generator and AHU were provided with a gas supply from station local services, via an electric gas solenoid safety shut off valve, with a localised emergency push button shut off.

Drainage

  • The location of the building on the station upper deck prohibited the use of gravity drainage within the foot print of the building, and therefore all soil and waste services within the building were pumped with the exception of the WC block, which had the benefit of an existing 4” soil connection which was used for the new WC block.
  • The remainder of the waste services were catered for by localised macerators of varying sizes, ranging from small domestic units for isolated single sinks, to large industrial macerators employed at the trolley wash and industrial dish washers.
  • All pumped wastes were piped to high level and connections made to existing station soil pipes running above the building or localised soil stacks at building support columns, dependent upon location.
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