Supply of power generators in the Torre Espacio Skyscraper

The following project was an immense challenge, not only because of the height of the systems but also due to the requirements of the project regarding fire protection and fuel spillage in such a singular building: a unique installation.
It required automation and control of the gas oil supply needs from the main tank to the daily service tanks in all three power generators located at different altitudes. One on the roof, 270 m high, and the other two at 198 m from the propulsion unit of the pressure unit.
The area for the main tank is classified as ATEX, which conditions the manufacture of the system -it must comply with the applicable regulations. Other conditions required anti-spillage safety measures due to the increased requirements regarding environmental control, being a public access building.

SOLUTION ADOPTED BY INPRO

PIPE LINE

The gas oil distribution piping was made from carbon steel.
Pipes were selected according to the criteria of standard DIN 4755 indicating that gas oil speed in propulsion pipes must be between 1 and 1.5 m/s and in suction pipes between 0.2 and 0.5 m/s.

MAIN TANK INTERSTITIAL CHAMBER DETECTION

To detect leaks in the double skin of the main tank, we chose a DDP-25 vacuum system with regenerative pump and fluid separation valve. This significantly decreases the possibility of false alarms, which occur more often with other detection methods. That detection system complies with standard EN 13160-1, Class 1.

MAIN TANK CONTROL

A digital level display is installed, with EDM-40 continuous analog probe for local reading of the capacity of the tanks and analog outputs (0-10V – 4/20 mA) as well as a 95 dB alarm to prevent overfilling while unloading the truck.

PUMP SYSTEMS

A “split” pressure group is installed, consisting of two bodies (benches). The body with control elements (pressure switch, manometer, expansion tank and alternative remote control) is installed on the roof due to the pressure required to pump the gas oil up to that altitude. The propulsion body (motor pumps, filter, retention valves and vacumeter) is installed inside the building. The installation areas in the lower part of the building are classified as ATEX, so the propulsion body of the pressure unit has protection degree IP-55/ EExeIIBT4.

DAILY SERVICE TANK FILLING

Daily service tank filling on the roof is controlled by an overfilling control and safety system consisting of: filter, N.C. filling control solenoid valve, flow limiter, N.O. filling control solenoid valve. The solenoid valves are managed with the SMMR-2 control panel that receives signals from the two level monitoring probes in the daily service tanks, one for operation and one for safety. For overfilling spillage safety redundancy, a flow switch is installed in the vent.
At the inlet of the daily service tanks for the intermediate power generators located 72 m under the roof, a control unit is installed, consisting of: Filter, pressure reducer, N.C. solenoid valve and N.O. solenoid valve 230 Vca. Due to spillage safety reasons, a pressure valve is installed after the reducer, connected to the return pipe to the main tank.

PROJECT PICTURES

ELEMENTS OF THE INSTALLATION SUPPLIED BY INPRO

PROBE EDM40

Continuous level display and control unit completely adapted to the needs of the installation. Displays the level at all times, expressed as a percentage. All required operations can be done via the relay module and the analog communication output. Customized manufacture makes this unit perfect for all kinds of tanks and a wide array of fluids.
•    Standard operating temperature: 40ºC that can be adapted to reach up to 125ºC.
•    Control unit in standardized module (DIN 43700) 96 x 43 x 100, can be mounted with panels.
•    Flexible probe with sealed head, can be fastened with 2’’, 11/2’’ or 1’’ nuts. Mounted with aluminum or standardized flange.
•    Overfilling warning alarm triggering with 95 dB acoustic signal, automatic shut-off and reset push button with IP-55 protection. It complies with the requirements of the standard MI-IP03 on “Oil Installations for own consumption”.

INTERSTITIAL CHAMBER DETECTOR DDP-25

Vacuum leak detector for interstitial chamber in double-skinned tanks according to EN 13160-1, Class 1.
•    Has a regenerative pump controlled with an adjustable vacustat. Thus keeping a -400 mBar pressure between the inner and outer skins of the double-skinned tank. When dropping below 380 mBar, the pump regenerates the vacuum; if there are any holes, the negative pressure does not regenerate; the alarm triggers upon reaching 340 mBar.
•    These units are perfect for tanks of up to 3 m of diameter.

COLLECTOR TRAY WITH SPILLAGE DETECTOR

Placing collector trays under certain elements of the installation is recommended. Particularly, equipment that could leak due to its characteristics or during maintenance tasks. Placing a spillage detector for the tray gives the possibility of creating protocols.
•    Furnace-painted plate tray with the appropriate size for each circumstance.
•    Spillage detector in the control panel and detection probe. Infrared optical sensor for oil and water, conductivity sensor for water or both, mounted on the same probe.
•    Standard 1.5 m probe.
•    The control unit of the detector is mounted in a box with impact-resistant plastic cover. The control unit contains two voltage free relays, one for commuting and the other one usually open.

SOLENOID VALVES

Set of solenoid valves to control the filling process and safety against spillage due to excessive levels.
•    Chrome plated brass Y-shaped filter, with stainless steel 0.05 mm mesh PN16.
•    Gas oil N.C. solenoid valve to control the filling process.
•    A regulated and sealed container (flow limiter) adapted to the desired flow, consisting of a chrome plated brass valve and nylon seals.
•    Gas oil N.O. solenoid valve to control the filling process.

PRESSURE REDUCING VALVE

Adjust the propulsion pressure to the burner or pump line operating needs.
•    “Output pressure adjustable with manometer or fixed, depending on the model.
•    ÖFlow between 20 and 3,000 L.

LEVEL SWITCH

SMMR level switches perform the operations required for the filling process and the tank overfilling alarms and protocols. Custom manufacture based on actual needs.
•    Probes manufactured from different materials to work with fluids such as gas oil, oil, water, milk, etc.
•    Probe with sealed head, can be fastened with 2’’, 11/2’’ or 1’’ nuts, mounted with aluminum or standardized flange.
•    For controlling pumps, solenoid valves, alarms, etc…
•    Control box with relays and power supply.

PRESSURE UNIT GP-GEMT

Split gas oil pressure unit that allows automatic supply to burners and pumping to emergency generators via pressure adjustment, at heights of over 60 meters. The start-up and stop operations with a pressure switch are conducted in the control body located at the highest part of the installation, using the pumping power of the gear pumps at high pressure that allows reaching great heights. Control cables must be laid.
Propulsion Body
•    Gear electric pumps with three-phase or mono-phase supply.
•    Vacumeter.
•    Aluminum filter, retention valves and safety valve with exhaust line.
•    Motor protection IP-55
•    Alternative electronic control management system
•    Vacumeter
•    Aluminum filter, retention valves and safety valve with exhaust line.
Control Body
•    Expansion vessel with membrane.
•    Operation and minimum safety pressure switch
•    Possibility of all-or-nothing outputs for incident control from central control with 3, 4 or 6
signals. GSM alarm system via SMS messages or modem connection.

 

 

 

 

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