RHOSS TCCEY 114, Инструкция по эксплуатации

Страница: 19 / 84

SECTION I : USER
19
I SECTION I :: USER
I.1 VERSIONS AVAILABLE
The available versions belonging to this product range are listed below.
After having identified the unit, you can use the following table to find
out about some of the machine's features.
T
Water production unit
C
Cooling only
H
Heat pump
A
Air-cooled with centrifugal fans
E
Hermetic compressors
Y
R410A refrigerant fluid
Number of
compressors cooling capacity (kW) (*)
1 14
1
17
1 21
1
26
1 28
(*)
The power value used to identify the model is approximate, for the
exact value, identify the machine and consult the enclosed documents
(
A1 Technical Data).
-
Standard unit
T
Unit with pump and storage
H
Unit with high head pump and storage
I.2 ADAPTIVEFUNCTION PLUS
The new AdaptiveFunction Plus adaptive control logic is an exclusive
RHOSS patent and the result of a long collaboration with the University
of Padua. The various algorithm processing and development
operations have been implemented and tested on the Compact-Y range
of units in the RHOSS Research&Development Laboratory by means of
numerous test campaigns.
Objectives
 To always guarantee optimal unit operation in the system in which it
is installed. Evolved adaptive logic.
 To achieve the best performance from a chiller and a heat pump in
terms of energy efficiency with full and partial loads. Low consumption
chiller.
Operating logic
In general, the actual control logics on chillers/heat pumps do not
consider the features of the system in which the units are installed; they
usually control the return water temperature and there aim is to
guarantee the operation of the chillers, giving less priority to the system
requirements.
The new AdaptiveFunction Plus adaptive logic contrasts these logics
with the objective of optimising chiller operation according to the system
characteristics and the actual thermal load. The controller regulates the
flow water temperature and adjusts itself according to the operating
conditions using:
 the information contained in the return and flow water temperature to
estimate the load conditions, thanks to a particular mathematical
function;
 a special adaptive algorithm that uses this estimate to vary the start-
up and switch-off threshold values and position of the compressors;
optimised compressor start-up control guarantees maximum precision
in the water supplied to the utility, thereby reducing the fluctuation
around the Set-point value.
Main functions
Efficiency or Precision
Thanks to the advanced control, the chiller can run on two different
control settings in order to obtain the best possible performance in
terms of energy efficiency and therefore, significant seasonal savings or
high water delivery temperature precision:
1. Low consumption chiller: “Economy” Option
It is known that chillers work at full load for only a very small
percentage of their operating time and at partial load for most of the
season. Therefore, the power they must supply generally differs from
the nominal design power, and partial load operation significantly
affects seasonal energy performance and consumption.
This makes it necessary for the unit to run as efficiently as possible
with partial loads. The controller therefore ensures that the water flow
temperature is as high as possible (when operating as a chiller) or as
low as possible (when operating as a heat pump) whilst being
compatible with the thermal loads, which means it shifts, unlike
traditional systems. This prevents energy waste associated with the
unnecessarily onerous chiller temperature levels being maintained,
thereby guaranteeing that the ratio between the power to be supplied
and the energy to be used to produce it is always optimised. The
right level of comfort is finally available to everyone!
Summer:
the Compact-Y unit with 4 shutter steps allow for significant
seasonal electrical energy savings.
Y
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
0
X
4 5
6
7 8
9
10
X
Year divided into months (1 January, 2 February, etc.)
Y
Power consumption (kWh)
Single-compressor unit with fixed Set-point.
Bi-compressor unit, 2 shutter steps with fixed set-point.
Bi-compressor Compact-Y unit, 3 shutter steps with
sliding set-point.