Delivery of Split Air conditioning units for Offshore Thailand

OSV delivered two explosion proof split air conditioning units for offshore Thailand during March 2009. These units are to be used to air condition and pressurize a switchgear room and an emergency shelter. Each compressor / condenser unit included an Exd control panel which contained motor contactors and overloads controlled by a Siemens Logo PLC. The PLC is programmed to achieve temperature and humidity control as well as protect components such as compressor and fan motors. The PLC also receives a permissive to start from the platform system and reports back to the platform system the unit status and alarms if there is a malfunction.

The specification for the compressor/condenser section includes:-

• Units to be suitable to operate in a Class 1 Division 2 Group D hazardous area.
• Condensing unit frames of 316L stainless steel.
• Condenser coils to have copper fins and copper tubes with a coating to inhibit corrosion.
• R407C refrigerant

Control systems included hot gas bypass to give capacity control and reverse cycle operation which would automatically provide heating at times of low heat load.

The cooling performances are 18 kW for the switchgear room and 6 kW for emergency shelter.

OSV also provided the design of the HVAC system and all other HVAC components including combined aircon/pressurizing unit, fire dampers, pressurizing dampers, grilles and cowls, differential pressure switches, external ducting, room temperature controllers and Exd control panels.

OSV specialize in designing and building HVAC systems for areas classified as hazardous such as offshore oil and gas platfroms and analyzer houses.

OSV delivered two explosion proof combined air conditioning / pressurizing units for offshore Philippines during January 2009. These units are to be used to air condition and pressurize two mobile accommodation units which include a supply office and sleeper cabin. The air conditioning units are designed as single packages which include a pressurizing system and are designed to be recessed into the sides of the steel building.

The air conditioning unit specification includes:-

• External are classified as Zone 2 IIB
• Suitable for use in Zone 1 IIB during purge mode.
• Unit frame material of 316L stainless steel.
• Evaporator and condenser coils with copper fins and copper tubes with coating to inhibit corrosion.
• Two 100% pressurizing fans designed to operate as duty and standby.
• Independent PLC’s for control of pressurizing fans and air conditioning systems.
• Automatic purge mode followed by pressurization on system start

The cooling performance for each air conditioning unit is 14 kW.

OSV also provided the design of the HVAC system and all other HVAC components including HVAC control panels, fire dampers, electric purge/pressurizing dampers, louvres, and an Exd panel for gas and smoke detection and for purging and pressurizing the buildings.

OSV specialize in designing and building HVAC systems for areas classified as hazardous such as offshore oil and gas platforms and analyzer houses.

Air conditioning unit Panna-Mukta Offshore India HVAC

OSV Engineering Pte Ltd delivered an air conditioning unit in May for an offshore platform in India. The unit is to be used to air conditioning a DCS Control room located in a hazardous area classified as class 1, division 2 group CD on the Panna-Mukta Field. It is designed as a single package but includes duplicate air conditioning systems and duplicate pressurising systems all on one skid base. The pressurising systems comply with the requirements of NFPA 496 which include providing an airflow velocity of 0.305 m/s through all openable doors when simultaneously open. The pressurising section has 2 x 100% capacity with fan operation detection and automatic changeover to the standby fan if the duty fan fails. On duty fan failure a signal will be generated for alarm. There is a changeover damper which ensures that the duct from the standby fan is sealed. The unit operates using refrigerant R407C which is an environmentally friendly flourocarbon containing no bromine or chlorine.

The air conditioning unit cooling performance is 90 kW (2 x 100%)

The unit was delivered to Singapore for onward shipment for assembly into the module in India. OSV also provided the designs of the HVAC system and all other HVAC components including the control panel, heaters, dampers, ducting, grilles and diffusers.

OSV specialize in designing and building HVAC systems for areas classified as hazardous such as offshore oil and gas platforms and analyser.

Air conditioning unit en route to Poleng C Process Platform, Indonesia

OSV Engineering Pte Ltd delivered another air conditioning unit for an offshore platform in March 2007. The unit is to be used to air condition a Control room and an Electrical Equipment room on Poleng C Process Platform in Indonesian waters. It is designed as a single package but includes duplicate air conditioning systems and duplicate pressurising sytems all on one skid base. The pressurising sytems comply with the requirements of NFPA 496 which include providing an airflow velocity of 0.305 m/s through all openable doors when simultaneously open. Operation of the pressurisation fans is monitored and on failure of the duty fan the system will change over to the standby fan and alarm at a remote location.

The air conditioning unit cooling performance is 70kW (2 x 35kW)

The unit was delivered to Batam Island in Indonesia for assembly into the module. OSV also provided the design of the HVAC system and all other HVAC components including the control panel, heaters, dampers, ducting, grilles and diffusers.

OSV specialize in designing and building HVAC systems for areas classified as hazardous such as offshore oil and gas platfoms and analyzer houses.