Air Cooled Screw
-
Capacity: 90-460 TR
-
Compressor: Semi Hermetic Single Screw Compressor
-
Compressor No: 1/2
-
Refrigerant: R134a
-
Evaporator: Flooded Shell and Tube
-
Inverter: Standard VFD’s
-
Made In: China
High-efficiency & Energy-saving
IPLV – Reflecting Energy Saving Performance of
Air Conditioning Unit in a More Scientific Manner
The Integrated Part Load Value (IPLV) is calculated by the weighted factor of the unit operation time under specific workload based on the coefficient of performance (COP) in part load (100%, 75%, 50% or 25% load). In most cases, the central air conditioning system operates in part load and the IPLV just indicates the overall efficiency level when the unit works in part load. Therefore, the IPLV can reflect the energy saving performance of air conditioning unit in a more scientific manner.
IPLV = COP in 100% load x 2.3% + COP in 75% load x 41.5% + COP in 50% load x 46.1% + COP in 25% load x 10.1% (GB standard)
High IPLV – Saving Running Cost
DAIKIN Inverter air cooled screw chiller unit adopts the latest inverter single-screw compressor and the most advanced inverter technology to achieve higher efficiency in part load and more precise control. In the operating conditions specified in national standards, the IPLV of the unit can reach 4.63(GB), 28% higher than the conventional air cooled screw unit. Thus the unit operates in a more energy saving manner.
Energy Saving Calculation
Project overview: An office building in East China has a construction area of 11,000 m2 , in which the air conditioning area is 9,300 m2 . The cooling load is 1,395 kW. The unit works for cooling for 270 days, running for ten hours every day.
Optional solution:
Energy Saving Efficiency With the excellent COP in part load, the inverter air cooled screw chiller unit can save at least 20% power consumption of the main unit compared with the conventional air cooled screw chiller unit all year round. Solution Summary With the outstanding part load performance, the inverter air cooled screw unit particularly applies to the places where the annual load fluctuates greatly, the part load runs for a long time, and the air conditioning load changes a lot due to obvious time/area division and large people fluctuation. For example, hotels, hospitals, office buildings and public buildings.
Note: The operating condition and weighted calculation method of the heating IPLV are not defined in the national standards, so the cooling IPLV is used for calculation.
Note: The standard commercial electricity is charged by 1 Yuan/kW.h.
High IPLV Design Technology
Inverter Single-screw Compressor
The unit adopts the inverter single-screw compressor and controls the inverter to implement stepless speed regulation with the microprocessor, thus realizing 12.5% to 100% continuous output.
Electronic Expansion Valve
The unit adopts the most advanced electronic expansion valve to precisely control the flow of refrigerant entering the evaporator. Thus the unit applies to multiple operating conditions and provides multiple control functions to guarantee its efficiency.
Economizer
The unit adopts the circular plate economizer to improve its degree of supercooling, thus greatly enhancing its cooling capability and energy efficiency.
Pure Counterflow Shell and Tube Evaporator
The unit adopts the pure counterflow shell and tube evaporator with the latest energy saving & environmental protection concept to perform reverse heat exchange between the refrigerant and refrigerating medium, thus implementing more adequate evaporation at ultrahigh temperature and higher heat exchange efficiency.