Call for tenders for the manufacturing of the temperature control System for the Indoor Unit of the Cryogenic Compressor System of ALMA.
An active thermal management system is needed to keep the ICCU within the required temperature range of +5° C to +28°C. Especially the Adsorber would be affected if operated outside the defined temperature range. Possible contamination could be the consequence which would affect the whole cryogenic system. A non acceptable maintenance effort or damages of the Cryogenic system would be the result. Therefore a proper Control system for heating and cooling is required and needs to be realised. The Control System will be located within a protective enclosure of the Indoor Compressor Unit.
This is a build-to-print procurement. The Contractor shall validate the design described in the Technical Specifications and the drawings.
The European Southern Observatory (ESO) wishes to identify potential bidders for the build-to-print manufacture of a temperature control system which will control the environmental operating conditions of the indoor unit of the cryogenic compressor system of ALMA. The attached document provides further details on the scope of work.
The call for tenders will be issued by ESO to selected companies on March 3rd. If you are interested in this opportunity, please reply to this email by March 3rd 2010, so we can put you in contact with ESO.
Please provide your name, company name and address in your reply, together with a brief resume of your company.
Robert Pfab
Mail to TENDEROPPORTUNITIES@stfc.ac.uk
Purpose of the procurement
The Atacama Large Millimeter and Sub-Millimeter Array (ALMA) will be operated on the Chajnantor plateau 5000m above sea level in the Altiplano of the northern part of Chile.
The Cryogenic System of ALMA is part of the infrastructure and provides the necessary cooling for the low noise receiver within the front end vacuum vessel. It is mandatory for the successful astronomical observations that the Cryogenic System operates reliable in terms of temperature stability and robustness.
The central part of that system is the He compressor unit, which are located outside of the receiver cabin on the antenna platform. The selected compressor concept for the ALMA application is divided in two units, the Indoor Compressor Control Unit (ICCU), and the Outdoor Compressor Unit (OCU).
The ICCU is designed for the indoor Laboratory use and a protection against the environmental influences is mandatory to provide the required operational condition specified by Sumitomo. Therefore a protective Enclosure including an active temperature control system is required to guarantee the necessary protection and operational temperature.
Type of Business
Electro Installation, Wiring, Cabling, Verification and testing of the PLC based control electronic.
Competencies required
The Contractor shall demonstrate his ability to manufacture the control electronic based on examples of previous projects.
In particular the Contractor shall provide evidence of expertise in the following technical fields:
Electro installation
Wiring and assembling of control electronic according to specification and drawing
Verification Tests on PLC (programmable logic computer) based control electronics