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1
District Heating Solutions
Page 2
2
Clean Energy Heating Policy
34%
50%
70%
0%
10%
20%
30%
40%
50%
60%
70%
80%
2016 2019 2021
Ratio of Clean Heating
Sever Cold Area
Cold Area
Cold Winter &
Hot Summer Area
Warm Area
Winter Clean Heating Plan for the Northern Region
(2017-2021)
- Issued on Dec.27,2017
- Jointly issued by 10 ministries and commissions
- The clean heating rate in the northern region will reach 50% in
2019, and 70% by 2021, replacing 150 million tons of looseburning coal
- For “2 + 26” urban areas, by 2021realize clean heating and
remove all coal boilers below 35 tons in urban areasin county
townsthe clean heating rate reach 80% and remove all coal
boilers below 20 tons; In rural areas, the rate of clean heating
reaches more than 60%.
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3
Heating
Energy
Efficiency
Low
Ambient
Heating
Capacity
Reliability
The Challenges of Low Ambient Heating With Air
Source Heat Pump
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4
Emerson Low Ambient Temperature ASHP Solutions
EVI Scroll Heating Technology
• Create a second suction port in the scroll
• Through the second suction circuit, increase the refrigerant flow and
enlarge the enthalpy difference of the main refrigerant circuit
Normal module refrigerant circulation
EVI module refrigerant circulation
EVI Compressor
EVI Cycle Schematic Diagram EVI Cycle Pressure-enthalpy Diagram
Brazed plate
heat exchanger
Expansion
Valve
Vapor Injection
Evaporator
Increasing
cooling capacity
increasing
heating
capacity
Optimized
compression
process
Main flow + injection flow
main flow
injection flow
Condenser
Page 5
5
EVI and Liquid Injection System Schematic
Diagram
Condenser
Evaporator
Economizer
Sol V
EXV
EXV
Liquid Injection
EVI
Filter drier
Enthalpy
Pressure
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6
Operating Range Comparison Between EVI and
Liquid Injection Compressor
• The minimum evaporating temperature of Copeland
Scroll™ ZW series EVI compressor is as low as -35 ℃. It
can meet the heating requirements at lower ambient
temperature. This is helpful for the application of ultra-low
temperature air source heat pumps in severe cold areas
such as Xinjiang province.
• The wide envelope also ensures the reliability of heat
pump systems equipped with EVI compressors in low
ambient temperature applications.
EVI ZWseries
Liquid injection
100%
87%
77%
67%
59%
104%
93%
82%
74%
66%
58%
52%
0%
20%
40%
60%
80%
100%
120%
0-5-10-15-20-25-30
HCOP (W/W)
Evaporating temperature ()
Heating Capacity Comparison
4%
6%
8%
9%
11%
* 55 Condensing temperature
EVI
Liquid Injection
Heating COP Comparison
100%
88%
77%
68%
60%
108%
98%
90%
82%
73%
63%
52%
0%
20%
40%
60%
80%
100%
120%
0-5-10-15-20-25-30
HCOP (W/W)
Evaporating temperature ()
EVI
Liquid injection
12
%
16%
20
%
21
%
8
%
* 55 Condensing temperature
EVI VS Liquid System Advantages
Project Advantages
Heating
Capacity
↑ 8-10%
↓ Number of units
↓ Electrical heating
↓ Initial
investment
Heating COP
↑ 15-20% ↓ Running cost ↓ Payback
period
Liquid Injection
Condensing Temperature(
Evaporating Temperature
Page 7
7
Excellent Heating Performance Effectively Shortens
Payback Period
Emerson EVI
Liquid
Injection
Reduce discharge
temperature
Yes
Yes
Increase heating
capacity
Increase
No
Improve heating
efficiency
Improve
Decrease
Air-side Heat
Exchanger
Water-side
Heat
Exchanger
Electrical
Heater
Economizer Piping Total
+
-
0
The liquid injection system has higher applied cost than EVI system (base).
Low energy
efficiency
Low energy
efficiency
Low heating
capacity
Heating Source Cost
Gas Boiler
Other LLI
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8
Indoor Temperature：20/15℃
Outdoor Temperature℃
Heating Capacity %
EVI Heat Pump
Traditional Heat Pump
EVI Advantages in Low Ambient ASHP System
• Greatly improve the reliability of heating in low ambient temperature
- Expand the operating range of the unit, and it can still provide high-temperature hot water stably at an
ambient temperature of -30
• Improve the heating capacity of the unit at low temperature
- Increased heating capacity by 10-20% at low ambient temperature
• Improve the energy efficiency of system, save running costs, and shorten the payback period
- Using economizer circulation to improve cooling EER 7 ～ 10%
- Improve heating COP by 20% at low ambient temperature
Page 9
9
9
Industry Standard Upgrade to Improve Energy
Efficiency Guidance
In 3-5 years, HSPF(APF) Will Be The Metrics of Low Ambient Temperature Heat Pump
Units. Firstly to Release IPLV(H) Evaluation System, Then to Synchronously Evaluate The
Revised High Water Temperature and APF(CSPF&HSPF).
GB/T 25127-2010 Product
Standard
IPLV, 41C water temperature
GB 37480-2 2019 Energy
Efficiency Standard
(based on V. 2010)
IPLV, 35/41/55C temperature
GB/T 25127-2019 Product
Standard
APF, 35/41/50C water
temperature
Scenario 1（revise
immediately）:
GB xxxx-2021 Energy
Efficiency Standard
APF, 35/41/50C water
temperature
Scenario 2 （to be revised in 5 years）:
GB xxxx-2024 Energy Efficiency Standard
APF, 35/41/50C water temperature
2010
2018 2019
2021
2024
For long-term, should
revise to 50˚C and
corresponding energy
efficiency.
IPLVH Level GB374802019
Released on Apr 4,
2019 and to be effect
on May 1st2020
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10
10
Emerson Low Ambient Application Product Profile
• Patented EVI technology
• The continuously expanding EVI
product line
• Rich EVI application experience
Emerson’s Decades of EVI Design, Manufacturing and System Application Experience
Guarantee The Reliable Design and Stable System Operation for Our Customers
exhaust
suction
EVI
10 20 30 60
HP
Capability
High Water Temperature
Applications
ZW Series
Low and Medium
EVI Series
Variable Speed
Series
0
10
20
30
40
50
60
70
-40 -20 0 20 40
Condensing Temperature
（˚C)
Evaporating Temperature(˚C)
ZW Low
ambient
temperature
high water
temperature
series
EVI low ambient
temperature
medium water
temperature
series
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11
Emerson EVI Scroll Heating Technology Summary
Perfect Solution for Heat Pump Heating System
Reliable
• Stable heating capacity under ultra-low ambient enables
the application of air-source heat pump units in north
regions
• Meet the heating needs of non-central heating area
Energy Saving
• Save operating costs by up to 70%
Environment
Friendly
• Replace coal boiler for heating, improve air quality
• From the perspective of primary energy efficiency, CO2
emissions can be reduced
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1212
Intellectual Property and Expert Assessment
Tsinghua University, Shanghai Jiaotong University and Harbin Institute of Technology
Have Highly Praised The Systems Using Emerson EVI and Variable Speed Technology
201420634719
Variable Speed Scroll Compressor
Copeland Scroll™ Variable Speed Compressor
Won Innovation Product Award
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Emerson’s Successful Case
A district heating project in Beijing
R32 heating project in a shopping
mall in Yining, Xinjiang
Heat pump heating project of a
ski resort in Jilin
R32 project in a scenic
spot in Beijing
Heating project in a residential
building in Shandong
A poverty alleviation industrial
base in Yining
A heating project in Ningyang, Ningxia
District heating project of a
community in Shandong
A district heating project in Tianjin
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