Alternator/Compressor System for off Engine Refrigeration
The Rapid-Power integrated
alternator/compressor system has been designed to overcome
significant operating and reliability limitations inherent in
current off-engine refrigerated body trucks.
Our system deals specifically with the following design criteria,
1. Electrical accessory loads.
2. Compressor mounting & drive belts.
The Rapid-Power integrated system includes a high output at idle
alternator, and a precision-machined compressor and
alternator-mounting bracket. The refrigeration compressor is driven
off a separate pulley so that no modifications are made to the OEM
drive belt system.
Electrical accessory loads
An OEM alternator is not usually capable of dealing with extra
electrical accessories at engine idle, consequently the electrical
load from the refrigeration condenser and evaporator fans and
compressor clutch coil causes battery discharge at idle. This
condition will severely shorten battery life, can cause starting
failure in the event of engine stalling, can shorten the life of
refrigeration fan motors and can cause slow running of fan motors
which reduces refrigeration efficiency.
A Rapid-Power alternator covers the entire electrical load at
engine idle including; cabin air conditioning, all lights,
windscreen wipers and body refrigeration with battery charge always
being maintained at 28Volts or 14V depending on the vehicle type.
A Rapid-Power alternator does not require an idle up device
to achieve these results.
Existing, off engine refrigeration fit-outs may require the
compressor to be driven via one or two of the alternator drive
belts. This reduces belt wrap on the alternator pulley, which in
turn can cause alternator belt slip and reduced belt life. For these
vehicles the Rapid-Power system provides an auxiliary pulley mounted
between the water pump and fan that drives the compressor. No
modifications to the existing truck components are required.
The Rapid-Power compressor-mounting bracket is a billet machined
aluminium block that mounts the compressor in a fixed position. This
system ensures correct belt wrap on all pulleys and does not
interfere with OEM drive belt system.
The system outlined above is vehicle specific; with each model
designed to bolt on to existing engine block mounting holes.
Installation is simple and requires no mechanical adjustment of any
original engine components. This system prevents belt
miss-alignment, eliminates premature belt wear, eliminates battery
undercharge, improves refrigeration efficiency and accommodates
increases in refrigeration capacity if required. The vehicle
operator can use all electrical accessories at all times without
causing any battery discharge.