GB/T 39779-2021Design guidelines for distributed energy system of combined cooling, heating and power (English PDF)

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.

5.4 The distributed energy station of combined cooling, heating and power

(hereinafter referred to as "distributed energy station") shall be set up close to users; the site planning and building requirements shall comply with the relevant regulations of GB 50016 and DL/T 5508-2015.

a) The exhaust gas emission and chimney setting shall meet the requirements of GB 13271;

b) The noise value of the distributed energy station shall meet the requirements of GB 3096, GB 12348, and GB 22337;

c) The environmental vibration of the distributed energy station shall meet the requirements of GB 10070;

d) The discharged water quality shall meet the requirements of GB 8978 and GB/T 31962.

a) The design load shall include the design day calculation load and the hourly load throughout the year; the cooling and heating loads include building load and technical load;

b) The design load of each stage of the project: estimation shall be adopted in the earlier-stage planning stage; calculation shall be adopted in the mid-term design stage; actual measurement shall be adopted in the later-stage operation stage;

c) For the design load, give priority to adopt or refer to the measured data; then, obtain it by calculation. For the calculation of the cooling and heating load, see GB 50736;

d) For the design load analysis of the distributed energy system of combined cooling, heating and power, see DL/T 5508-2015.

a) For the power subsystem, see Appendix A, Appendix B, and Appendix C in GB/T 36160.2-2018;

b) For the refrigeration and heating subsystem, see Appendix B and Appendix C in GB/T 36160.1-2018;

c) Refer to Figure A.2. for the cold storage and heat storage system.

6.5 Refrigeration and heating system

6.5.1 The refrigeration and heating system of the distributed energy system of combined cooling, heating and power is composed of electric refrigeration and heating system, exhaust-heat refrigeration and heating system, exhaust-heat recovery boiler and auxiliary equipment. For specific parameter requirements and forms, see GB/T 36160.1-2018.

6.5.2 The exhaust-heat utilization system shall follow the design principles of temperature matching and gradient utilization; the selection of the refrigeration and heating system shall comprehensively consider factors such as project characteristics, load characteristics, energy quality coefficient of the output medium, and economic efficiency.

6.5.3 The application equipment of the refrigeration and heating system shall be determined according to the prime mover's exhaust heat parameters. The exhaust heat shall be used when the exhaust gas temperature is >=120 °C and the cooling water temperature is >=75 °C. The energy efficiency of the selected refrigeration and heating equipment shall meet the requirements of GB 19577 and GB 29540.

6.5.4 The prime mover and the refrigeration and heating equipment shall adopt a one-to-one configuration; for micro gas turbines and internal combustion engine generator sets with a small unit capacity, a many-to-one form can be used, and the same model of modular combination should be used for the generator sets.

6.5.5 The design of the refrigeration and heating system shall still comply with the relevant regulations of GB/T 36160.1-2018, GB 50019 and GB 50736.

7.1 General provisions

7.1.3 The distributed energy project shall undergo special system adjustment, which includes six stages, namely project establishment, data collection, inspection and testing, analysis and diagnosis, rectification implementation, and effect verification.

7.1.5 The operation and management of the distributed energy system of combined cooling, heating and power shall comply with relevant regulations in

7.1.1 The distributed energy system of combined cooling, heating and power

shall strengthen operation management and standardize project evaluation to achieve efficient operation of the system.

7.1.2 The operation management strategy, control and use methods, operation

instructions, and settings of different working conditions of the distributed energy system of combined cooling, heating and power shall be used as technical data management, which should be entrusted to professional institutions to study and formulate.

7.1.4 The distributed energy system of combined cooling, heating and power

shall develop comprehensive, safe and reliable emergency management measures for accidents. For key parts which are of high temperature, high pressure, inflammable and explosive, and prone to emergencies, risk analysis and safety evaluation shall be carried out in advance, and emergency plans and long-term preventive emergency measures shall be formulated.

GB 50365, GB/T 51131, GB/T 17981-2007, GB/T 36160.1-2018, GB/T 36160.2-2018, and GB/T 33757.1.

7.2 Operation evaluation

7.2.1 After the distributed energy system of combined cooling, heating and power has been in stable operation for at least one year (including at least a complete refrigeration season and a complete heating season), refer to Figure 1 and Appendix B for the following measurements, verifications, and evaluations:

a) For the evaluation results of 6.2.5 in the design stage, perform evaluation and review in the operation stage, to verify whether the performance meets the indicator requirements of 4.6;

b) According to the annual cooling, heating, power supply and power consumption and fuel consumption of the distributed energy system of the exhaust-heat utilization ratio is lower than 75% for a long time, the operation mode shall be optimized and adjusted.

7.4 Personnel and management

7.4.1 The operation of the distributed energy system of combined cooling, heating and power shall have professional operation and management personnel; the personnel shall be complete; the technical level shall be reasonable; they shall have relevant professional knowledge such as safety, health, and energy saving.

7.4.2 Operation management personnel shall undergo professional training and shall be employed after passing the assessment; the employing department shall establish and improve the personnel training and assessment system, and shall keep relevant files.

7.4.3 The operation management department shall establish the energy management system of the enterprise according to GB/T 23331; formulate the energy management system according to GB/T 15587; formulate and improve the target parameters suitable for the distributed energy system of combined cooling, heating and power according to GB/T 36713.

7.4.4 Public institutions shall establish an energy management system and energy management evaluation indicators for the distributed energy system of combined cooling, heating and power in accordance with GB/T 32019 and GB/T 30260.

7.4.5 For the distributed energy system of combined cooling, heating and power that is under the energy conservation monitoring, relevant measures for energy conservation monitoring shall be formulated in accordance with GB/T 15316.

7.4.6 The distributed energy system of combined cooling, heating and power

should be managed through building information models, smart equipment emergency management models, asset management databases, and equipment maintenance and repair databases.