TONGKUN HENGTONG

TONGKUN HENGTONG, a major PET producer in China, sought to recover low-temperature waste heat from its processes and reuse it as a valuable energy source.

EXERGY delivered three integrated high-temperature heat pump and Mechanical Vapour Recompression (MVR) lines, providing 14 MWth and upgrading waste heat at 60-70 °C into high-pressure steam for production, enabling significant energy recovery and improved operational efficiency.

Client name:
TONGKUN GROUP ZHEJIANG HENGTONG CHEMICAL FIBER CO., LTD.

Plant Location:
JIAXING CITY, CHINA

Date of implementation:
2025

Plant power:
~14 MWTH (TOTAL FOR THE 3 VCC+MVR SYSTEMS)

Application:
HEAT PUMP X-HEAT + MVR

HP UNIT:
Refrigerant:
R1233ZD

Compressor:
CENTRIFUGAL MULTISTAGE

COP:
3.2

Source:
HOT WATER 85-75°C

Sink:
HOT WATER 115-125°C

MVR UNIT:
Refrigerant:

R718 (WATER)

Compressor:
CENTRIFUGAL MULTISTAGE

Flow rate stream out:
6.64 T/H

Temperature out:
157.60°C

Pressure out:
3.75 BAR(A)

VCC + MVR:
COP:

3.71

Heating capacity:
4.6 MWT EACH

EXERGY has supplied an advanced industrial heat recovery solution for TONGKUN GROUP ZHEJIANG HENGTONG CHEMICAL FIBER CO., LTD. in Jiaxing City, China. The system combines EXERGY’s X-HEAT Heat Pump technology with a Mechanical Vapor Recompression (MVR) unit to maximize the recovery and reuse of thermal energy within the production process. Scheduled for start-up in 2025, the installation delivers approximately 14 MWth of sustainable heating capacity, helping the customer enhance process efficiency while significantly reducing energy demand.
Designed around high-efficiency multistage centrifugal compression technology, the plant upgrades low-grade heat into valuable high-temperature thermal energy for industrial use. By minimizing fossil fuel consumption and optimizing operating costs, the integrated Heat Pump and MVR solution supports a more sustainable manufacturing model. The project will avoid approximately 19,290 tonnes of CO₂ emissions per year, an environmental benefit equivalent to the annual electricity consumption of around 3,647 households, while ensuring reliable and efficient long-term operation.

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EXERGY has supplied an advanced industrial heat recovery solution for TONGKUN GROUP ZHEJIANG HENGTONG CHEMICAL FIBER CO., LTD. in Jiaxing City, China. The system combines EXERGY’s X-HEAT Heat Pump technology with a Mechanical Vapor Recompression (MVR) unit to maximize the recovery and reuse of thermal energy within the production process. Scheduled for start-up in 2025, the installation delivers approximately 14 MWth of sustainable heating capacity, helping the customer enhance process efficiency while significantly reducing energy demand.
Designed around high-efficiency multistage centrifugal compression technology, the plant upgrades low-grade heat into valuable high-temperature thermal energy for industrial use. By minimizing fossil fuel consumption and optimizing operating costs, the integrated Heat Pump and MVR solution supports a more sustainable manufacturing model. The project will avoid approximately 19,290 tonnes of CO₂ emissions per year, an environmental benefit equivalent to the annual electricity consumption of around 3,647 households, while ensuring reliable and efficient long-term operation.

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