TABLE OF CONTENTS

Small ammonia chiller cold room cooling
Introduction
Johnson Controls has built and supplied a small ammonia unit for keeping a storage
cold for ready for sale products. The room temperature is +10°C
In Denmark the maximum charge when using HFC refrigerants is 10 kg. This could be
interpreted as the reason for going ammonia. However, in this case the main reason for
using ammonia is the company policy to reduce its carbon foot print and using natural
refrigerants is one of the ways Novo Nordisk hopes to do that.
About the company
Since its start in 1885, Johnson Controls has grown
into a global leader in building efficiency, automotive
experience, and power solutions. JCI is one of the
leading companies of refrigeration and chiller solutions
based on natural refrigerants. It offers products and
services that optimize energy use and improve comfort
and security.
More information at:
www.johnsoncontrols.com
Contact Information
Alexander Cohr Pachai
Alexander.C.Pachai@jci.com
(+45) 8736 7159
About the system
The high efficiency of ammonia helps to reduce the running cost of the system. The
inverter insures that the compressor can adjust the capacity to the requirements at
any time of day giving an optimal efficiency. The compressor furthermore has two unloaders
allowing the load to become relatively low before the compressor is cut out.
As the final product is temperature sensitive the reliability of the chiller is very important
to the customer. The design and the way the system works is regarded as so safe that
the customer has decided only to install one unit instead of two.
The compressor is inverter driven which gives a very high efficiency especially in low
load periods. The unit is placed on a roof which makes the installation very simple to
access and it presents no problems if a new compressor needs to be installed in case of
an unexpected break down.
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