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GB/T 41087-2021: Technical specification for heat exchange system of solar thermal power plant
GB/T 41087-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.160
CCS F 12
Technical specification for heat exchange system of solar
thermal power plant
ISSUED ON: DECEMBER 31, 2021
IMPLEMENTED ON: JULY 01, 2022
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... 5 
4 System composition and parameters ... 6 
5 Normal use environment ... 8 
6 Technical requirements ... 8 
7 Testing content ... 15 
8 Technical documents and drawings ... 15 
Annex A (informative) Schematic diagram of the main flow of the heat exchange
system ... 16 
Technical specification for heat exchange system of solar
thermal power plant
1 Scope
This Standard specifies system composition and parameters of heat exchange system
of solar thermal power plant, environmental conditions for normal use, technical
requirements and test detection.
This Standard applies to heat exchange systems for water/steam, molten salt and
thermal oil media.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 150, Pressure vessels
GB/T 151, Heat exchanger
GB/T 5657, Technical specifications for centrifugal pumps (Class Ⅲ)
GB/T 12145, Quality criterion of water and steam for power plant and steam-
generating equipment
GB 12158, General guideline for preventing electrostatic accidents
GB/T 17116 (all parts), Pipe supports and hangers
GB/T 19518 (all parts), Explosive atmospheres - Electrical resistance traces heating
GB/T 20801 (all parts), Pressure piping code - Industrial piping
GB 23971, Heat transfer fluids
GB/T 24259, Petroleum and natural gas industries - Pipeline transportation systems
GB/T 32348 (all parts), Petroleum and natural gas industries - Pipeline
transportation systems
GB/T 36376, Solar molten salt (nitro type)
GB 50016, Code for Fire Protection Design of Buildings
GB 50764, Design code of power piping for power plant
GB 50974, Technical code for fire protection water supply and hydrant systems
GB/T 51307, Standard for design of solar power tower plant
DL/T 5054, Code for design of stream/water piping of fossil-fired power plant
HG/T 20507, Design code for instrument selection
HG/T 20549, Design Standard Piping Layout for Chemical Plant
NB/T 47044, Valves for power station
SH/T 3040, Specification for design of tracing piping and jacket piping in
petrochemical industry
SH/T 3073, Design Specification for Petrochemical Piping Support and Hanger
SH/T 3097, Specification for design of static electricity earthing in petrochemical
industry
TSG 21, Supervision Regulation on Safety Technology for Stationary Pressure Vessel
TSG G0001, Boiler Safety Technical Supervision Administration Regulation
TSG ZF001, Safety Technical Supervision Regulations for Safety Valves
TSG ZF003, Safety Technical Supervision Regulations for Bursting Disc Devices
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 heat exchange system
It consists of a series of equipment and its accessories for heat exchange between heat
transfer medium and working medium or heat storage medium.
NOTE: It mainly includes steam generation system and oil-salt heat exchanger system.
3.2 oil-salt heat exchanger
A device for heat exchange between molten salt medium and thermal oil medium.
3.3 preheater
follows:
The range of the steam-water side of the steam generation system (see Figure A.1 in
Annex A): FROM the feed water inlet of the preheater TO the steam outlet of the
superheater, the steam inlet of the reheater TO the steam outlet of reheater.
The range of molten salt side of the steam generation system (see Figure A.2): FROM
the molten salt inlet of the superheater TO the molten salt outlet of the preheater, the
molten salt inlet of the reheater TO the molten salt outlet of the reheater.
The range of thermal oil side of the steam generation system (see Figure A.3): FROM
the thermal oil inlet of the superheater TO the thermal oil outlet of the preheater, the
thermal oil inlet of the reheater TO the thermal oil outlet of the reheater.
The range of oil-salt heat exchanger system (see Figure A.4, Figure A.5): FROM the
inlet of the oil-salt heat exchanger of the system TO the outlet of the oil-salt heat
exchanger of the system.
4.2 Basic parameters
4.2.1 The basic parameters of design input mainly include the following:
a) Operating parameters: including flow, temperature, pressure, heat load;
b) Physical parameters: including medium composition, density, specific heat
capacity or enthalpy, vapor partial pressure, viscosity, thermal conductivity;
c) Allowable pressure drop;
d) System operation mode: including the number of starts and stops, the frequency
of load changes under various working conditions of the power plant;
e) Others.
4.2.2 The system and equipment life shall not be less than 25 years.
4.2.3 The system design pressure shall not be lower than the maximum working
pressure that may be reached during operation.
4.2.4 The system design temperature is not lower than the maximum operating
temperature that can be reached during operation.
4.2.5 The number of starts and stops of the heat exchange system of solar thermal power
generation can be performed as follows. The specific times shall be comprehensively
determined according to the operating characteristics of the power plant:
a) Cold start (stop over 72h) 10 times/year (24 times/year during commissioning);
b) Warm start (stop between 10h~72h) 250 times/year (320 times/year during
commissioning);
c) Hot start (stop time is between 1h~10h) 300 times/year (400 times/year during
commissioning);
d) Extremely hot start (within 1h of unit shutdown) 50 times/year (100 times/year
during commissioning);
e) Load step (load change value per minute > 10% of nameplate power) 15750 times
/ 25 years.
4.2.6 The temperature rise rate of the heat exchange system of solar thermal power
generation shall meet the operation requirements of the power station. On the premise
of ensuring the safe operation of the system and equipment, the temperature rise rate of
the heat exchange system of the tower solar thermal power plant shall not be lower than
6℃/min. The temperature rise rate of the heat exchange system of the trough solar
thermal power plant shall not be lower than 8℃/min.
5 Normal use environment
5.1 Ambient temperature: -50℃~60℃.
5.2 The ambient humidity shall not be higher than 95%.
5.3 The maximum wind speed shall not be higher than 30m/s.
6 Technical requirements
6.1 General requirements
6.1.1 The rated evaporation of the steam generation system shall match the rated
working conditions of the steam turbine. The maximum continuous evaporation shall
match the full open condition of the steam turbine valve. At the same time, the variable
working characteristics of the system shall be considered.
6.1.2 The rated working condition of the oil-salt heat exchanger system shall match the
rated working condition of the steam turbine.
6.1.3 The thermal efficiency of the system under the design co...