MRC has recently introduced HVAC system in the product line. MRC has successfully built a new plant for manufacturing of HVAC systems with complete facility to test the systems with scada controlled testing lab. MRC proudly introduces its HVAC system with ‘KESTREL’ Brand name.
MRC produces purpose built total climate control systems to provide the best in passenger comfort for mass transit vehicles. Combining state of the art equipment designs with quality materials, MRC knows what it takes to deal with tough, varied and extreme environmental conditions.
Air conditioning systems are made up of the following elements: Air conditioning unit:
For the passenger compartment
For the driver’s cab Air renewal in the room:
Fresh air supply
Partial recycling of air from the room Air distribution:
Ducting and air diffusion network Extraction of exhaust air:
Partial extraction of the air from the room towards the exterior Temperature control system:
Automatic temperature controller with the associated program
Temperature control sensors and man-machine interface (display unit) Additional heaters:
Floor heater
Duct heater Electrical installation:
Electrical panel energy converter
Air conditioning in trains: a combination of know-how and
high-tech products to ensure exceptionally long service lives
Specifications
The work to design an air conditioning system for railway applications requires considerable
experience and first-class engineering quality to meet the many different challenges involved;
here are some of the main aspects:
• Equipment service life: 20 to 30 years,
• Thermal, acoustic and electrical performances levels expected in the
ventilation, heating, cooling and pre-conditioning modes,
• Shocks and vibrations generated during running and/or by other sources (diesel engines),
• Climatic operating conditions, variations in carriage occupation rates, sudden cut-offs
in the electric power supplies, time for putting into service, compliance with maintenance
intervals, etc.
• Reliability, maintainability and diagnostics.
Preliminary studies
• Calculation of thermal performance levels in the various modes, commitments as to
noise levels, undertakings as to failure rates,
• Concept of air distribution and diffusion in the vehicle,
• Concept of command and temperature control,
• Mass balance and electricity consumption,
• Communication with the train bus or other communication systems,
• Concept of failure management, maintenance and diagnostics,
• CAD of the various elements making up the air conditioning system in relation to the
constraints concerning volume, mechanics, and electrical interfaces. Validation
During the validation phase on the equipment manufacturer’s premises:
• Validation of the components without prior railway references,
• Construction of a prototype or initial series unit,
• Performance and safety tests on an initial series unit or a prototype,
• Vibration and noise level measurement tests on an initial series unit or a prototype,
• Software pre-validation of the temperature control and communication systems.
