Air climate control system for railway

UPEC PRODUCTS AND SERVICES
FOR RAILWAY INDUSTRY
AIR TURBO TECHNOLOGIES
INDUSTRIAL GROUP
www.att.upec.ua
AIR CLIMATE CONTROL SYSTEM
Air-cycle Turbo Technology (ATT) for new generation of HVAC-systems is intended for heating, ventilation and air conditioning of buildings, industrial premises and warehouses, motor vehicles and railway rolling stock, in particular, passenger railway cars, as well as other mobile and stationary
objects. Special design of the machine provides more intense local cooling of the heat-generating units (power panels, control systems and process
equipment).
ATT is a fully variable air-cycle system working in the summer (t = +25...50°C) as an air conditioner and in the winter
(t = +7...-40°С) as an air-to-air heat pump. Simultaneously ATT works as a ventilation system. All ATT heating modes use only electrical
energy – no fuel combustion, no electric coils.
ATT ADVANTAGES
1. Fully environmentally friendly (no refrigerant and oil). The absence
of refrigerant is especially important for vehicles (for example,
passenger railway cars) due to the potential refrigerant circuit leak in
conventional air conditioners caused by vibration and impact loads
2. High energy efficiency with a low re-circulation rate. In cold
periods, the heating rate is 2.8...4.2 in the temperature range
+7...-50°C; in warm periods, the cooling rate is 1.3...1.6 in the
temperature range +25...+50°C with fresh air supply of up to 100%
3. Fully variable operation in any weather conditions
4. High air quality in cooled (heated) premises (with teperature
+20...24°C and fresh air supply of 50...100%; in summer with
relative humidity 40...60%)
5. No vibration and acceptable noise level
6. Low specific weight and dimensions
7. Easy serviceability
8. Low operating costs
High energy efficiency of ATT is ensured by optimal thermodynamic air-cycle scheme, unique highly efficient heat exchanger and turbo
compressor, as well as low aerodynamic resistance of its valves and ducts. For example, ATT-30/60 uses a turbo compressor with a compressor stage (adiabatic efficiency of 86%) and a turbine stage (internal efficiency of 87%). The turbo compressor rotor has a built-in high-speed
motor with efficiency of 92%, which charges from a frequency inverter with efficiency of 97...98%. The rotor is supported by air bearings with
mechanical efficiency of over 99%. Heat efficiency of the heat exchanger reaches 94% at resistance of up to 500Pa.
Turbo compressor
Heat exchanger
Comparison of ATT with conventional conditioner and boiler in railway cars
Parameters
ATT
Ambient air temperature and relative humidity, °C/%
Heating or cooling productivity, kW
3
Air supply (13...16°C in summer and 30...50°C in winter) in car, m /h
ATT
Boiler
ATT
CAC
Heating
-20/70
55.0
2000...3700
5000
2000...3700
24
0...50
19.0
85...90
>18
22
0...50
16.5
Rated temperature in car, °С
Recycling ratio in car, %
Power consumption, kW (maximum)
ATT — UPEC Air-cycle Turbo Technology
CAC
Air Conditioning
40/30
29.0
26.0
46.0
hot water
heating
22
85...90
50.5
0/100
21.0
-
2000...3700
-
24
0...50
7.0
9.0
CAC — conventional air conditioner
In the air conditioning mode, the ATT is highly competitive with
the CAC in energy consumption and cooling productivity, and also
shows a significant advantage in the fresh air supply into the cars,
which is very essential. In addition, the absence of refrigerant and oil
in the machine cycle makes ATT fully environmentally friendly and
results in significantly lower operating costs.
In the heating mode, the CAC performance is limited. Most CACs
operate at ambient temperature of 0...-5°C with a relatively low
heating productivity of 2.2...2.6. At lower ambient temperatures, the
heat pump capacity and heating productivity are considerably
reduced, resulting in the necessity to maintain and operate a boiler
as well. In addition to that, a boiler consumes nearly three times
more electricity than the ATT.
As a result, in the railway passenger cars the ATT fully replaces conventional air conditioners, coils or boilers, leading to a significant reduction
in power consumption in cold periods and a considerable increase in the fresh air supply into the car in both cold and warm periods, the reduction of the car weight by 4 tonnes (reduction of the passenger stock weight by 75...80 tonnes) and decrease of the operating costs due to
absence of the refrigerant.
ATT-60/120 for stationary use
ATT-30/60 for passenger cars
The ATT-30/60 can be used for climate control in both passenger
railway cars and stationary applications.
The ATT-60/120 is designed for climate control of stationary indoor
areas of any purposes.
Parameter
Cooling/heating productivity (summer/winter), kW
Air supply to premises (including 50 ...100% fresh air), m3/h
Temperature of air supplied to premises (summer/winter), °C
Rated motor power, kW
Power consumption (depending on the operating mode), kW/h
Power supply: current type/voltage/frequency
Relative air humidity in premises (summer), %
Noise level (depending on the operating mode), dB
Unit dimensions, mm
Weight, kg
Warranty period
ATT-60/120
20...60/20...120
4000...7400
6...14/25...50
20
5...20
40
10...40
~3ph/380 V/50 Hz
40...60
40...65
2160x1830x655
3000x2800x1500
700
1500
up to 2 years
Service life time
UPEC Industrial Group
Air Turbo Technologies
4, Marshal Batitskiy Str.
61038 Kharkiv, Ukraine
ATT-30/60
10...30/10...60
2000...3700
up to 10 years
phone: +38 057 738-15-50
mobile: +38 050 323-70-78
[email protected]
www.att.upec.ua
www.upec.ua

Download Report