Modular Water Source/ Geothermal Heat Pump Unit
DR/DV standard model for underground circulation conditions
|Basic modules|| ||EKWD021CRDR/DV||EKWD032CRDR/DV||EKWD043CRDR/DV|
|Underground circulation mode||Nominal Cooling Capacity||kW||76||113||153|
|Nominal Heating Capacity||kW||79||115||159|
|Total Power of Nominal Cooling Capacity||kW||13||20.4||27.2|
|Total Power of Nominal Heating Capacity||kW||16.8||26.0||34.3|
|Water flow||Application side||m³/h||13.1||19.4||26.3|
|Heat source side||m³/h||15.3||22.9||31.0|
|Nominal Cooling Capacity||kW||67.7||102||137|
|Nominal Heat Recovery Capacity||kW||85||128||172|
|Total Nominal Power||kW||17.3||26||35.0|
|Nominal water flow at the heat recovery side||m³/h||14.6||22.0||29.6|
|Nominal water flow at the evaporation side||m³/h||13.1||19.4||26.3|
|Water heater mode||Nominal Heating Capacity||kW||72||109||146|
|Total Nominal Power||kW||20||30.6||41.0|
|Nominal water flow at the hot water side||m³/h||14.6||22.0||29.6|
|Water flow at the heat source side|
|Application side (air conditioner side)||kPa||19||35||32|
|Heat source side||kPa||26||20||19|
|Application side (evaporator)|| ||Plate||Shell-and-tube|
|Heat source side (condenser)|| ||Shell-and-tube|
total pipe diameter
|Volume Adjustment||Steps|| ||2||3||4|
|Regulation mode|| ||Fuzzy control|
|Compressor||Model|| ||Fully hermetic volute|
|Lubricant|| ||Mineral oil (SUNISO 3GS)|
|Refrigerant||Flow control method|| ||Electronic expansion valve|
|Dimensions||L x H x W||mm||1647x1202x632||2247x1488x710|
|Unit weight||Net weight||kg||452(517)||703(818)||887(1040)|
1, The modular water source/geothermal unit supports applications
in all conditions and can switch between multiple modes to fully
meet user needs for cooling, heating, and hot water. With an
innovative water system, the energy-saving unit delivers an EER as
high as 5.7, provides higher energy efficiency when working at a
partial workload, and saves energy by 50% compared with other
systems after operation in a year.
2, The unit is designed with a comprehensive water system and
consists of efficient components carefully selected and designed
for a low operation noise. The unit supports fuzzy volume
regulation for a narrow range of temperature changes and quickly
reaches the set temperature. In addition, the unit provides hot
water at a set temperature as high as 55°C quickly and steadily to
meet requirements for comfortable hot water in all places..
3 With modular design, the unit starts step by step, reducing the
shock on the grid, and maintenance of a single unit does not affect
running of other units. In addition, the unit provides multiple
built-in security protection functions, and supports intelligent
and centralized control, facilitating daily management.
4, The leading-edge shell design allows the unit to be installed in
an outdoor space such as terrace and rooftop without the need of a
dedicated room. The unit delivers a long lifecycle and runs for
long. Units may be installed in batches according to project
progress. One water system that works in multiple modes saves
investment on other devices such as heating and hot water supply
devices, thereby saving the energy..
5, The 32RT and 43RT basic modules support free combination of
master units and slave units to form 1 to 16 units, providing as
many as 153 solutions for a cooling capacity as high as 688RT.
6, The unit sends control signals to valves of the water system to
easily switch between the water source/geothermal heat pump mode,
heat recovery mode, and water heater mode, meeting requirements for
cooling, heating, and hot water around the clock.
7, The unit easily implements variable primary flow pumping, which
helps the central air conditioning system save energy by 30%.
8, The modular design allows transportation by using elevators and
manual forklifts and eliminates the need for hoisting.
9, The modular design allows units to be moved separately and
assembled, facilitating installation work.
10, The unit works with efficient volute compressors,
shell-and-tube condensers, and dry evaporators, and is carefully
designed by EK experts upon strict comprehensive tests for model
selection. This ensures that the unit works in a least energy
consuming way. The unique evaporator structure and efficient
compressor technologies allow the unit to reach an EER as high as
5.7 when working at full workload and to save more energy at a
11, The evaporator and condenser use efficient heat exchange copper
tubes for thorough evaporation and condensing and a higher
efficiency. A baffle plate is mounted inside the evaporator to
change the water flow direction, further enhancing heat exchange.
The system flow structure is simple, heat exchange is stable, and
maintenance is easy.
12, Combinations of modules allow volume regulation for more steps
and support precise control by 11RT at each step. This helps the
unit stay in the optimal energy conservation state and work
efficiently around the clock.
13, The control system of the unit sends out intelligent control
signals for the cooling tower, cooling water pumps, and chilled
water pumps, automatically regulates the temperature of the cooling
water by controlling the fan of the cooling tower, and reduces
energy consumption of the cooling water tower. This enables
automatic flow control for pumps in line with the transducer, which
helps the central air conditioning system save energy by 30%.
14, The unit is built with pressure protection, antifreeze
protection, overload protection for compressors, and water flow
protection, ensuring security of the unit. The system provides the
self diagnosis function. The controller sends an alert upon a fault
and displays the fault code.
15, The unit centralizes system management functions, adopts a
modular structure, and starts step by step, reducing the shock on
the grid. The unit ensures balanced wear for compressors, which
increases its lifecycle. Failure of a single compressor in the unit
does not affect normal running of other units. Repair and
maintenance work of a single unit do not affect running of other
16, The unit can implement fuzzy volume regulation according to the
set temperature to ensure a narrow range of temperature
fluctuation. The unit adopts vibration isolation technologies and
multi-plenum noise reduction techniques for strict comparison,
selection, and improvement of components. Professional noise
reduction design for the structure and pipeline ensures
leading-edge vibration and noise performance of the unit.
17, The unit adopts shell design and does not require a dedicated
equipment room. It may be installed at any proper place indoors,
outdoors, or at rooftop. The shell adopts powder spraying technique
with anti-UV coating materials, which fade slowly over a long time
and greatly improve anti-erosive capabilities. The unit is small
and compact, and may be moved by using an elevator or manual
forklift. No professional hoisting devices are required, saving
installation expenses. Combinations can be formed with little space
during installation, reducing the land area required for placing
18, Modules and relevant devices may be added up at any time
according to changes of the application environment, thereby saving
initial investment and operating expenses. A design margin is not
required during model selection of the master unit, which may be
increased at any time. This reduces wastes.
19, The unit is applicable to heat recovery scenarios. It performs
precise monitoring on the temperature of the heat recovery circular
water (circular water of the condenser), automatically outputs
signals, and controls switching between cooling water and heat
recovery circular water, thereby implementing optimal heat
With the help of over 40 years of experience in design of air
conditioner units, EK combined the advantages of water source heat
pump systems and heat recycler systems to launch the first modular
water cooled air conditioner (water source heat pump) unit in the
industry, that is, EKWD series modular water source/geothermal heat
pump unit. This series unit can work in water chilling mode, water
source heat pump mode, water source heat pump + hot water mode,
cooling + hot water mode, and hot water mode, thereby meeting
customer needs for multiple purposes, energy efficiency, stability,
reliability, intelligent control, flexibility, and comfort.