17
GB
1.
GENERAL
DESCRIPTION
1. General description
JUPITER is the range of precision air conditioners developed by TRANE™, conceived and designed specifically to meet
the air conditioning needs of call centers and Internet providers, data-processing centers and, more generally, any
technological environment characterized by high levels of heat value to dissipate. To guarantee the proper operation of the
equipment in such installations, it becomes essential to keep the temperature and humidity conditions constant throughout
the year; that is why we speak of controlling the ambient conditions, not just cooling. The air-conditioning systems intended
for the purposes of “comfort” are designed specifically to guarantee the well-being of the people in the room and are
generally incapable of ensuring that the ambient conditions required by technologically sophisticated equipment can be
kept constant, especially in the presence of much higher specific heat loads. In precision air-conditioning applications,
on the other hand, there are four main objectives to pursue, which prompt important design decisions that distinguish
precision air-conditioners from those intended to ensure personal comfort:
(1)
In the air-conditioning of large technical rooms used for telephone and Internet applications, the density of the heat load
(per unit of surface area) is very high, even as much as 6-10 times the density of the heat load in comparable areas used as
commercial offices, for instance. Standard air-conditioning equipment designed for ensuring comfort are unable to cope
with such densities and types of heat load, especially concerning the total absence of any latent load characteristic of
technological applications.
(1) The capacity of maintaining the temperature and humidity within the tollerances indicated depends on the system and ambient conditions in which the unit is installed;
the values indicated are therefore only possible in optimum conditions
Air temperature control
The air conditioners in the JUPITER range are able to control the air temperature in the conditioned room with utmost
precision, adapting their cooling or heating capacity to the heat load in the room by means of sophisticated microprocessor
control PID algorithms designed and developed by TRANE™. They are also able to react promptly to any major changes
in the heat load, restricting to a minimum any oscillation in the ambient temperature with respect to the set point which
depending on the version may be based on the air return temperature or the discharge temperature.
Air humidity control
The sophisticated equipment contained in the rooms requiring precision air-conditioning must be adequately protected
both from any condensation inside the room and from any static electricity charges. To achieve this objective, it is essential
to control the humidity level in the room extremely accurately. In fact, an excessively high humidity level can lead to
condensation forming inside the electronic equipment, whereas if the humidity level is too low there is a danger of a
prevented and avoided.
High airflow rate
The conditioners on the JUPITER range are the outcome of an accurate fluid dynamics study which has enabled the airflow
to be optimized, ensuring high specific air flow rates in order to guarantee a high SHR [Sensible Cooling/Total Cooling
Rooms occupied by equipment used for telephone or internet transmission, as well as large data processing centres
require high airflows to cope with the ambient heat load without having to resort to excessively low air delivery temperatures,
thus guaranteeing uniform conditioning for all parts of the room. The high density of the heat loads which are characteristic
of such applications, together with the lower thermal inertia of the system, requires the number of cycles per hour to be
about 10 times more than that for an air-conditioning application for the purposes of comfort cooling in order to avoid
troublesome fluctuations in temperature.
Year-round operation (24 hours a day 365 days a year)
The air conditioners in the JUPITER range are designed to operate all year round without interruption and all of the
technical and procedural decisions have been made with a view to achieving an extremely high degree of reliability for
the equipment. The sophisticated research behind their design has combined an accurate selection of the components
involved with an innovative production process guaranteeing absolute reliability and increased energy efficiency,
fundamental aspects when constant control of the ambient conditions is required. These results are achieved not only
through appropriate selection of the components (resulting from the many years of experience acquired in the field of
air-conditioning for technological environments), but also through accurate design of the software used to design the
equipment and the rigorous testing carried in the TRANE™ research and development laboratory. This software is based
on the event prediction principle, which enables action to be taken in advance on the strength of analysis on the trends of
the room temperature, guaranteeing precision and optimizing energy consumption.
Energy efficiency
The air conditioners in the JUPITER range have been designed to operate all year round, it is necessary, therefore, for the
units to be optimized in such a way as to guarantee minimum electrical absorption in all operating conditions resulting in
reduced running costs. In order to guarantee maximum energy efficiency the units have been designed to optimize the heat
exchange surface and the fluid dynamics in order to reduce the electrical absorption of the fans and the compressors. All of
the versions are available with two types of fans, traditional and electronically commutated in order to minimize electrical
absorption.
