GB/T 38680-2020 in English
VALIDTechnical guidelines for central heating system using low grade industrial surplus heat
- Issued on:2020-03-31
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$117.00
| Standard No: | GB/T 38680-2020 |
| Document status: | VALID |
| Title in English: | Technical guidelines for central heating system using low grade industrial surplus heat |
| Title in Chinese: | 工业低品位余热集中供热系统技术导则 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-03-31 |
| Implemented on: | 2020-10-01 |
| ICS Classification: | 27.010-Energy and heat transfer engineering in general |
| Chinese Classification: | F04-Basic standards and general method |
| Professional Classification: | GB-National Standard |
| Related Keywords: | industrial waste heat system design single heat source
waste heat resource classification system waste heat industrial low-grade waste heat waste heat temperature |
| Related Topics: | heating
waste heat Thermal system instrument grade Industrial grade thermal system gold industrial grade Thermal Testing Technology GBT38680 GB/T 38680-2020 |
《GB/T 38680-2020工业低品位余热集中供热系统技术导则》由TC20（全国能源基础与管理标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Core Value and Technological Evolution of the Standard
This standard systematically constructs the industrial low-grade waste heat (≤95℃ liquid/≤200℃ flue gas/≤400℃ solid) heating technology system for the first time, filling the standard gap in my country's field of cross-industry waste heat coordinated utilization. Compared with traditional heating standards, its innovation is reflected in:
| Comparison dimensions | Conventional heating standards | This technical guideline |
|---|---|---|
| Heat source characteristics | Stable and controllable energy | Volatile industrial waste heat |
| System design | Single heat source as the main one | Multi-heat source networking + heat storage configuration |
| Business model | Fixed heat price settlement | Agreed return water temperature dynamic settlement |
Analysis of key technical indicators
5.1 Waste heat resource classification system
The standard innovatively proposes a three-dimensional classification method:
- Liquid carriers: including condensed water, acid, etc. A typical case is the waste heat recovery of circulating cooling water in a steel plant
- Gaseous carriers: such as coke oven gas. A cement plant uses 200℃ flue gas to heat 500,000 square meters annually
- Solid carriers: The utilization of slag waste heat requires the use of mobile heat storage technology
5.2 Quantitative evaluation indicators
Waste heat heating area ratio (ηs) is the core KPI. A certain industrial park saved 23,000 tons of standard coal annually by increasing this indicator to 35%. Calculation formula:
ηs = (Sr/St)×100%
Where Sr is the waste heat heating area, St is the total heating area
Key points for project implementation
6.3 Selection of heat storage device
For fluctuating waste heat, the standard requires the configuration of a heat storage capacity of not less than 75% of the design heat load. A chemical plant uses phase change heat storage modules to solve the problem of unstable heating caused by intermittent production.
6.7 Application of heat pump technology
When the waste heat temperature is less than the return water temperature, it is recommended to use an absorption heat pump. Cases show that the use of heat pumps can increase the waste heat utilization rate by 40%, and the investment payback period is less than 3 years.
| Technical Solution | COP Value | Applicable Scenarios |
|---|---|---|
| Conventional Heat Exchange | 0.6-0.8 | Temperature Difference＞30℃ |
| Compression Heat Pump | 3.0-4.5 | Areas with Adequate Electricity |
| Absorption Heat Pump | 1.5-2.2 | With Driven Heat Source |
Operation and Management Innovation
7.4 Business Model Innovation
The standard pioneered a return water temperature settlement mechanism, which links heat price with energy efficiency through the formula Qj=(Ts-T0)×M×Cp×τ×10-6. After implementation, a heating company reduced its return water temperature by 8°C, increasing its annual revenue by 1.2 million yuan.
7.10 Safety protection system
For special heat sources such as acid waste heat, it is necessary to establish:
- Corrosion monitoring system
- Double isolation valve group
- Emergency neutralization device
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 4272-2024 in English
General principles of thermal insulation technique for equipment and pipes
2024-09-29 -
GB/T 33651-2017 in English
In-situ measurements of heat loss through thermal insulation of equipments and pipes -- Infrared image method
2017-05-12 -
GB/T 38678-2020 in English
General technical requirements for shallow geothermal energy utilization
2020-03-31 -
GB/T 16664-1996 in English
Monitoring and testing method for energy saving of power supply distribution system of industrial enterprise
1996-01-02
