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GB/T 39779-2021: Design guidelines for distributed energy system of combined cooling, heating and power
GB/T 39779-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Design guidelines for distributed energy system of
combined cooling, heating and power
ISSUED ON: MARCH 09, 2021
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 6 
4 General rules ... 8 
5 Planning and decision-making ... 10 
6 Engineering design ... 12 
7 Operation management ... 17 
Appendix A (Informative) Configuration of the distributed energy system of
combined cooling, heating and power ... 20 
Appendix B (Informative) Scope of evaluation content of the distributed energy
system of combined cooling, heating and power ... 22 
Appendix C (Informative) General process of distributed energy project
approval and engineering construction ... 24 
Appendix D (Informative) Energy-converted standard coal reference
coefficients ... 25 
Appendix E (Informative) Various energy-converted equivalent electric
coefficient ... 27 
Appendix F (Informative) Energy quality coefficient of common cold and heat
quantity ... 28 
Appendix G (Informative) Energy equivalent value of energy-consumed
medium ... 29 
References ... 30 
Design guidelines for distributed energy system of
combined cooling, heating and power
1 Scope
This Standard specifies the general rules, planning and decision-making,
engineering design, and operation management which are involved in the
design of the distributed energy system of combined cooling, heating and power.
This Standard applies to the distributed energy system of combined cooling,
heating and power, which is based on gas fuels; it also applies to the design of
distributed energy project or distributed energy station of combined cooling,
heating and power, which is based on gas fuels. It can be used as reference for
the distributed energy system of combined cooling, heating and power, which
is based on liquid fuels, under the same technical conditions.
This Standard does not apply to the distributed energy system of combined
cooling, heating and power, which is driven by solid fuels, including renewable
energy, and other non-fossil energy sources.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 2589-2020, General rules for calculation of the comprehensive energy
consumption
GB 3096, Environmental quality standard for noise
GB 8978, Integrated Wastewater Discharge Standard
GB 10070, Standard of environmental vibration in urban area
GB 12348, Emission standard for industrial enterprises noise at boundary
GB 13271, Emission standard of air pollutants for boiler
GB/T 15316, General principles for monitoring and testing of energy
conservation
GB 50019, Design code for heating ventilation and air conditioning of
industrial buildings
GB 50028, Code for design of city gas engineering
GB 50040, Standard for design of dynamic machine foundation
GB/T 50087, Code for design of noise control of industrial enterprises
GB 50118, Code for design of sound insulation of civil buildings
GB 50365, Standard for operation and management of central air
conditioning system
GB 50736, Design code for heating ventilation and air conditioning of civil
buildings
GB/T 50852, Classification standard of building engineering consultation
GB 51131, Technical code for gas-fired combined cooling, heating and power
engineering
GB/T 51285, Standard for the energy-efficient effect evaluation of building
energy performance contracting
DL/T 5508-2015, Code for design of gas-fired distributed energy station
JG/T 299, Technical specifications of thermal storage equipment for cooling
and heating
NB/T 32015, Technical rule for distributed resources connected to
distribution network
NB/T 42029.5, Code for design of reciprocating internal combustion gas
engine power station - Part 5: Cooling system
3 Terms and definitions
Terms and definitions determined by GB/T 33757.1, GB/T 36160.1-2018, GB/T
36160.2-2018, GB 50365, GB/T 50852, GB/T 34913-2017, GB/T 2589-2020,
GB 51131, and the following ones are applicable to this document.
3.1
Distributed energy system of combined cooling, heating and power
Energy quality utilization ratio
The percentage OF the sum of the output equivalent electric quantity and
cooling (heating) quantity of the distributed energy system of combined cooling,
heating and power AND the sum of the input equivalent gas or liquid fuel heat
quantity and other energies.
Note 1: This term takes into account the difference in energy grade and quality,
which is different from 3.4 energy utilization ratio.
Note 2: Refer to the "second boundary" in Figure A.1 for the calculation
boundary.
3.6
Commissioning
The working procedures and methods that perform a whole-process
management through testing adjusting and balancing, performance verification,
acceptance and seasonal working condition verification of the distributed
energy system of combined cooling, heating and power, so as to ensure the
realization of the design intent and the satisfaction of the actual use
requirements of users.
4 General rules
4.1 The design of distributed energy system of combined cooling, heating and
power shall mainly consider:
a) Guaranteed supply of energy (gas);
b) Reasonable site selection and establishment;
c) Efficient and energy-saving system;
d) Economic operation;
e) Environmental protection.
4.2 The design activities of the distributed energy system of combined cooling,
heating and power should include planning and decision-making, engineering
design and operation management; the design content generally includes
feasibility study, engineering design, and project evaluation and assessment.
For preparation of each stage, see GB/T 50852, or refer to the contents of the
municipal public engineering design documentation depth regulations and the
constructional engineering design documentation depth regulations, but not
limited to the feasibility study of the project.
establishment and engineering construction of the distributed energy project
can be found in Appendix C.
5.2 The earlier stage of a distributed energy project is the planning and
decision-making stage; a feasibility study of the project shall be compiled
according to the requirements of 4.2 according to the complexity of the project.
5.3 For the feasibility study of the project, refer to Appendix B for the
assessment of the earlier decision-making stage, which includes:
a) This stage is a qualitative assessment, which shall perform analysis of the
technology and energy efficiency of the distributed energy system of
combined cooling, heating and power;
b) The assessment is based on the matching of project supply and demand,
energy saving rate, energy utilization ratio, environmental and social
impact, and supplemented by economic indicators;
c) The assessment shall meet the content requirements of 4.6 and be
calculated in accordance with GB/T 33757.1 and GB/T 36160.1-2018;
d) The assessment should refer to the "fi...