GB/T 33757.2-2024 in English
VALIDEnergy saving ratio for distributed energy system of combined cooling, heating and power—Part 2: Multi-energies hybrid driven systems
- Issued on:2024-09-29
- Implemented on:2025-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
| Standard No: | GB/T 33757.2-2024 |
| Document status: | VALID |
| Title in English: | Energy saving ratio for distributed energy system of combined cooling, heating and power—Part 2: Multi-energies hybrid driven systems |
| Title in Chinese: | 分布式冷热电能源系统的节能率 第2部分：多能源互补驱动系统 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2024-09-29 |
| Implemented on: | 2025-04-01 |
| ICS Classification: | 27.010-Energy and heat transfer engineering in general |
| Chinese Classification: | F01-Technical management |
| Professional Classification: | GB-National Standard |
| Related Keywords: | energy system
power energy systems solar thermal energy calibration energy consumption conversion rules energy consumption fossil energy |
| Related Topics: | Energy Test System
|
《GB/T 33757.2-2024分布式冷热电能源系统的节能率 第2部分：多能源互补驱动系统》由TC459（全国能量系统标准化技术委员会）归口，主管部门为国家标准委。
Introduction
Analysis of the core content of the standard
GB/T 33757.2-2024, as a key component of the energy-saving evaluation system of distributed cooling, heating and power energy systems, focuses on standardizing the energy efficiency evaluation method of hybrid drive systems including fossil energy, renewable energy and hydrogen energy. The standard innovatively proposes the concept of calibrated energy consumption, which scientifically quantifies the energy-saving effect of the system by comparing the actual energy consumption with the benchmark energy consumption of the traditional production distribution method.
Comparison of key technical indicators
| Evaluation dimensions | Fossil energy system | Multi-energy complementary system | Improved efficiency |
|---|---|---|---|
| Energy input type | Single fossil fuel | 6 types of energy combination | +300% flexibility |
| Energy saving rate benchmark | Coal-fired power generation efficiency 40.8% | Photovoltaic power generation efficiency 14.5% | Differentiation conversion |
| Typical COP value | Absorption refrigeration 0.7 | Compression Refrigeration 4.5 | +542% Energy Efficiency |
Key Points for Implementation of Calculation Method
Energy Consumption Calculation in the Reporting Period
Appendix A of the standard specifies the energy consumption statistical formula in detail: Er = Fcons + Pcons + Hcons, where:
- Fuel energy consumption needs to distinguish between the combustion calorific value of fossil fuels and biomass fuels
- Electricity input needs to use different conversion factors according to the source type (grid electricity/renewable energy)
- Thermal energy consumption includes the equivalent calculation of external industrial waste heat and solar thermal energy
Calibration Energy Consumption Conversion Rules
The benchmark energy consumption model established in Appendix B includes:
- Fossil energy is uniformly converted into standard coal consumption
- Renewable energy is calculated based on original energy input
- The benchmark energy efficiency parameters in Table B.1 are used (such as 86% efficiency of coal-fired boilers)
System optimization suggestions
Based on the case study in Appendix C of the standard, the following improvement directions are proposed:
1. Load matching optimization: It is recommended to adjust the cooling, heating and electricity ratio to 1:0.8:0.6 to improve the waste heat utilization rate of the absorption chiller
2. Equipment selection and upgrade: Photovoltaic systems should give priority to components with a conversion efficiency of ≥18%, and the compression refrigeration COP should be above 5.0
3. Operation strategy innovation: Establish a hybrid energy storage scheduling model based on meteorological forecasts to achieve temporal complementarity of different energy sources
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