EKSC Series Flooded Screw Water (Ground) Source Heat Pump Unit
Water Circulating Type R134a
Overview
Water (ground) heat pump system is an efficient
and energy-saving air-conditioning system that uses the
shallow geothermal resources (also known as ground source
energy, including underground water, soil, or
ground surface water) to provide heating and cooling.
The system realizes shift of low temperature thermal
energy to high temperature thermal energy by introducing
few electricity energy. The ground source energy is used
as the heat source for heat pump in winter and the
cooling source for air-conditioner in summer. The unit
consumes energy of 1 kW to obtain more than 4 to 5 kW
cooling/ heating capacity. The energy sources from
underground. The system does not discharge any waste gas,
water, or residue, making it an ideal green air-conditioner
that can be widely used in office buildings, hotels,
schools, dormitories, hospitals, guesthouses, malls, villas,
and residential areas.
Unit Features
1.Single system flooded evaporator Multi-compressor
single-system design.
The industry-leading single-system flooded evaporator design and
multicompressor single-system design enable the single
compressor system to provide cooling capacity of up to 500 RT.
The compressors start one by one, greatly reducing shock of
the startup current on the grid. In partial load, the
dual compressors run by turns, providing a long life cycle.
2.Oil separation efficiency as high as 99.95%
The air return outlet of the flooded evaporator is directly connected to the air suction inlet of the compressor. The
optimal built-in oil route lubricating system is equipped with
an innovative external efficient oil separator, which has a
unique structure to change the flow direction and works with a
multi-layer high-density oil filter to deliver the optimal oil
separation effect with efficiency of more than 99.95%. The air
return outlet of the flooded evaporator is directly connected
to the air suction inlet of the compressor. This
effectively reduces pressure loss and ineffective overheat of
the air suction pipeline. Such design is compact, efficient
and energy-saving.
3. Environment-friendly R134a refrigerant ,
The refrigerant injection amount is reduced by 50% or
more compared with a traditional flooded unit. The
lubricant injection amount is reduced by 50% or more compared
with a traditional flooded unit. Applicable to heat pump, full
heat recovery, and cooling accumulation conditions.
.
4. Efficient and stable R134a flooded screw compressor
■ EK’s latest leading R134a efficient dual-screw
compressor technology specifically designed for flooded unit
is used. The maximum cooling capacity of a single-compressor
system can reach 450 RT, efficiently reducing the number of
compressors while obtaining high full-load COP. The full
series unit meets
national requirements for energy efficiency of
energy-saving air-conditioning products.
■ Direct connection design
The air return outlet of the flooded evaporator is
directly connected to the air suction inlet of the compressor.
This effectively reduces pressure loss and ineffective
overheat of the air suction pipeline. Such a design is
compact, efficient and energy-saving.
■ Oil supply upon pressure difference
The optimal built-in oil route lubricating system is
equipped with an innovative external efficient oil separator.
The oil is supplied through pressure difference. The structure
is simple, safe and efficient.
■ Oil spray and noise reduction
The unique oil spray and noise reduction function can spray a
small amount of lubricant to the air exhaust side, and form an
even oil film on the surface of the rotor to absorb
sound energy and reduce the overall noise of the compressors.
In addition, the even oil film can efficiently lubricate and
seal, reducing the leakage amount and improving
compressor efficiency.
■ Motor cooling
International famous efficient dual-pole three-phase
F-level insulation induction motor is used. The independent
motor cooling and heat dissipation design efficiently reduces
the air suction pressure loss and invalid overheat of air
suction. A PT100 temperature sensor is built in, and an INT69
module array is configured to protect the motor, providing
active control on motor temperature rise. The coil temperature
of the compressor motor can be accurately monitored and
regulated to ensure long-term and wide-range running of the
motor in the running range of the compressors
■ The design of smart control on even spray for
liquid refrigerant is adopted, improving the compressor
efficiency while fully reducing the risks of large-amount
leakage of refrigerant and lubricant. In addition, no heat is
discharged to the equipment room, saving the initial
investment and running expenses for cooling equipment in the
equipment room.
■ Capacity spool
The spool-type load adder/reducer device is used as
the compressor regulation mode. The capacity spool
structure configures a highly reliable international brand
electromagnet for precise control and perfect match with
actual load to ensure efficient running of the unit, provide
comfort and save the energy.
■ Dual-layer shell
A fine dual-layer shell f o r g e d b y g r a y c a s
t iron and processed by precision M/C machine tools
is used. A threedimensional precision tester is used to
test the processing precision, ensuring that the gap
of the compressor meets the requirements of
highefficiency calculation.
The dual-layer design complies with
pressure-bearing requirements, and reduces the noise. Such a
high-strength and high-rigidity design ensures long-term
running of the compressor.
5.Efficient heat exchanger
■ All internal heat exchange pipes use efficient heat exchange
copper pipes with inner and outer
threads to ensure optimal heat exchange flow rate of the
refrigerant and chilling medium, enhance the
heat transfer at the water side and refrigerant side, optimize
the heat transfer efficiency, reduce energy
consumption of the unit, and lower the running expenses.
■ The evaporator adopts the latest efficient flooded design to
efficiently reduce the filling amount of
the refrigerant by 50% or more compared with a traditional
flooded heat exchanger.
■ The unique built-in over-cooling design of the system can
fully avoid hydraulic shock of compressors and improve the
cooling capacity and efficiency of the unit.
■ The multi-level automatic oil return system accurately
returns oil regardless of theliquid level, eliminating
impact on heat exchange efficiency.
■ The standard piping mode provided by the heat exchanger is
trough coupling connection (with short
tube), facilitating field installation. Each evaporator and
condenser is equipped with independent air exhaust and water
drainage devices.
6.Precise and efficient liquid level control
■ The full series adopts liquid level controller with
high-resolution digital display and international famous brand
electronic expansion valve to steadily control the liquid
level of the evaporator at the optimal position so that the
unit achieves the optimal heat exchange effect at any load.
This ensures high performance running of the unit and
apparently improves the efficiency under partial load.
7.Smart Control
■ The large-screen LCD developed by EK is directly
connected to the digital control center, greatly improving
efficiency and providing monitoring, data recording, security
protection, and easy operations.
■ The chilled water outlet temperature is controlled to a
precision of ±0.2oC. Various sensors in the system can
accurately transfer signals and data to the controller so that
the controller can protect unit parts in a timely manner,
ensuring reliable running of the unit.
■ Three-level password protection prevents mis-operation
by non-professional personnel and ensures safe running of
the unit. In addition, multiple protection functions are
provided.
■ All running parameters and alerts of the unit can be
recorded and saved.
■ The start/stop of the unit can be remotely controlled and
data can be transmitted over Internet.
8.Centralized control
EK centralized control system adopts the
industryleading control solution. The product configuration
is applicable to the control system solution for the chilled
pump, cooling pump and cooling tower.
Multiple persons are allowed to control and monitor the unit
on the homepage of a Microsoft-based web
browser.
competitive advantage