Danfoss NeoCharge Technology -A Revolution in 2024.pdf

Nueva tecnología de Danfoss para disminuir la carga de refrigerante en sistemas de refrigeración

1. 1| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Danfoss NeoCharge:
Optimizing Low
Charge Ammonia
Systems
Hernan Hidalgo,
Sr. Director Business Development

2. 2| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Decarbonization in Industrial Refrigeration
through Innovative Solutions
Natural
Refrigerants
•NH
3, CO
2, and HC in focus
•HFOis also supported
Applications
•Larger transcritical CO
2
systems (“industrial design”)
•Industrial heat pumps
•Low-charge NH
3 systems
Technology
•Higher pressure and
temperature platforms
•Energy-saving devices (e.g.,
large ejectors)
NH
3 CO
2 HC

3. 3| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
A Continuous Journey for Optimization
Energy Efficiency / Refrigerant Charge
NH
3 CO
2

4. 4| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Ammonia DX
A simple & reliable approach
Danfoss Standard
Superheat Control
relies on reliable
sensors reading actual
superheat under
various loading and
operating conditions

5. 5| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Ammonia DX
A well-known Solution
The minimum stable
superheat allows for the
system to perform well.
Superheat requires the
evaporating temperature to
be lower to compensate.
It calls for larger evaporators
and Higher energy
consumption ~ 5 to 15%
higher.

6. 6| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Enthalpy
Pressure
2 1
X=0
X=1,00
X=1,07
Effects of Superheat
Superheat introduces a higher
energy consumption:
Requires lower evaporating
temperature than recirculated
systems ~ 10F
Higher power consumption
Compressor sizing: superheat
may increase motor size,
VFD power panel size

7. 7| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Operating with Stable & Controlled Superheat
From DX to NeoCharge–Moving up on Efficiency

8. 8| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Direct expansion system performance
0
20
40
60
80
100
120
0 0.2 0.4 0.6 0.8 1 1.2
Performance Index [
-
]
Gas quality -X-value [-]
Dry gas
Two
-
phase region
”wet”
Performance index for DX / Neo

9. 9| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Danfoss NeoCharge–DX evaporator Data
NH
3 CO
2
Start Superheat: 13.5F (7.5 C)
Ammonia evaporator: 15 TR
Evaporating Temperature:-20F

10. 10| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Danfoss NeoCharge–Moving up on Efficiency
Conventional DX

11. 11| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
NeoCharge–Efficiency / Controlled Zero Superheat
Danfoss NeoCharge:
•A Solution package that delivers :
5 to 15% lower energy consumption
compared to standard DX.
•Advanced algorithm delivers controlled
zero superheat
•Liquid feed modulation is possible with
the new ICADB
•Existing Plants: Easy retrofit, Increase
efficiency
•New Installations: Reduced investment
with total distributed control via Modbus
Connectivity
NeoCharge Control panel:

12. Neo for Recirculated Evaporators

13. 13| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Evaporator
V=100 l
WetSuction
pipe 4inch
32 ft
Tot
50 lbs

29 lbs
79 lbs
60 lbs
37 lbs
97 lbs
35 lbs
15 lbs
50 lbs
24 lbs
22 lbs
46 lbs
NH3 28TR
-31°F
Design
r=3
Actual
r=4,65
Controlled
r=1,5
Saving
Pumped System Uncontrolled vs. Controlled circulating rate

14. 14| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Constant circulating rate vs. uncontrolled circulating rate
(constant mass flow)
Capacity reduction impact Ice build-up impact

15. 15| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Uncontrolled Recirculated Evaporators Feed
As a
result:
Most existing plants were designed
with 3:1 or 4:1 recirc rate.
At full load and after an efficient
defrost, the evaporators would
start running at the design recirc
rate.
Most modern evaporators are
designed with 1.5:1 recirc rate
Over time, recirc rate will increase
up to twice the design operation
•Systems run with up to 40% higher ammonia charge
•Increased pressure drop in risers, higher Power

16. 16| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Circulation ration impact on pipe riser
Constant mass flow 50%
part load, pressure loss
increases from 0,0045 to
0,0074 bar/m 65%
In a 16’ (5 m) riser, the
pressure loss
corresponds to approx.
0,9F at full load and 1.6F
at 50% load

17. 17| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
NeoChargefor Recirculated Evaporators
Easy to mount Neo Sensor on
evaporator tubes
Suitable for New and Existing Plants
Stable and controlled recirc rate of
1.2 to 1.5:1 continuously over the
operation of the evaporator.
Liquid feed modulation is possible
with the new ICADB in ICF valve
stations
Existing installations can expand
capacity and still reduce ammonia
charge up to 40%

18. 18| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
0
20
40
60
80
100
Classical Pump
system
Controlled
Pump system
Classical DX
system
WDX system
100
50-60
~50 ~50
Refrigerant charge index (kg refrigerant / kW cooling)
Classical central pump system = Index 100
Super compact units
Large central system
Large central system
Super compact units

19. 19| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Compressor work index @ constant cooling capacity
Large central ammonia systems
0
20
40
60
80
100
120
140
Older 4:1 recirc system Modern Systems Neo Recirculated Classical
DX system
Neo DX Techn
Additional comp work:
Uneven distribution
Additional comp work:
Superheat
Additional comp work: ∆P
(wet) return line
Nom compressor work
Refrigerant charge index
Improvement 1-2%
Improvement 0-20%
Improvement 5 - 15%

20. 20| Classified as BusinessDanfoss NeoCharge: Optimizing Low Charge Ammonia Systems IIAR 2024
Futureproof: Energy Efficiency and Low Charge Technologies
Stainless Steel
Portfolio
NeoCharge: Ultra
High Efficiency
High Efficiency
Purgerlow-charge
PLC Based Controls
and Supervisory