Energy-Saving 15MW Condensing Steam Turbine Generator Unit N15-4.9

• Customization: Available
• After-sales Service: Global After-Sales Service
• Warranty: 12 Months After Supply
• Model NO.: N15-4.9
• Power: 15MW
• Generator Type: Synchronous Generator
• Certification: CCC, ISO, TLC, CE
• Standard: Nonstandard
• Form: Impulsive
• Material: Comply with Standards
• Medium: Steam
• Adjustment Method: Electro-Hydraulic Regulation
• Steam Inlet Pressure: 4.9MPa
• Steam Inlet Temperature: 470ºC
• Steam Consumption: 3.95kg/Kw.H
• Speed: 3000r/Min
• OEM, ODM: Available
• Transport Package: Sea and Land Transport
• Specification: Different power
• Trademark: Anhui Zhengyufeng
• Origin: Wuhu, Anhui, China
• Production Capacity: 100

Product Description

Product Parameters

Type of steam turbine	15MW Condensing Steam Turbine generator
Model No. of steam turbine	N15-4.9
Rated power	MW	15
Rated speed	r/min	3000
Rated steam inlet pressure	Mpa	4.9
Rated steam inlet temperature	ºC	470
Rated steam inlet flow	t/h	59.25
Rated exhaust steam pressure	Mpa	0.007
Rated steam consumption	kg/kw.h	3.95
Max component weight	ton	~30
Dimension	meter	7.5*4.97*2.7
OEM service is available. According to customers's parameter requirement, we can customized R&D,produce and supply steam turbines

Other models of condensing steam turbines

Model	Power (MW)	Steam inlet parameter		Steam consumption (kg/kw.h)	Steam intake (t/h)	Speed (r/min)	exhaust  pressure (Mpa)
		Pressure (Mpa)	Temperature (ºC)
N1.2-0.155	1.2	0.155	195	9.76	11.71	3000	0.007
N4-0.88	4	0.88	280	6.5	26	3000	0.008
N6-3.43	6	3.43	435	4.6	27.6	3000	0.0076
N15-4.9	15	4.9	470	3.95	59.25	3000	0.007
N25-8.83	25	8.83	535	3.58	89.5	6500/3000	0.006
N15-3.43	15	4.9	470	4.1	61.5	3000	0.007

Generator parameters

dynamo					Exciter
model	capacity	Voltage	Power Factor	efficiency	power	Voltage
	KVA	V		%	KW	V
QFK-3-2	3750	6300 3150	0.8	95.3	30	100
QF-3-2	3750	10500 6300	0.8	95.3	30	100
QF-6-2	7500	10500 6300	0.8	96.4	45	150
QF-7-2	8750	10500 6300	0.8	97	45	150
QF-12-2	15000	10500 6300	0.8	97	65	230
QF-15-2	18750	10500 6300	0.8	97	65	230
QF-25-2	31250	10500 6300	0.8	97.4	105	230
QF-30-2	37500	10500 6300	0.8	97.6	105	230

 

Product Description

Condensing Steam Turbine

A condensing steam turbine refers to a turbine where steam, after expanding and doing work inside the turbine, fully enters the condenser to condense into water, except for a small amount of shaft seal leakage.

Working Principle

After steam expands and performs work in the turbine, almost all of it (except for a small amount of shaft seal leakage) enters the condenser to condense into water. The exhaust steam of the turbine is cooled in the condenser, causing its volume to sharply shrink and form a vacuum. This reduces the exhaust pressure of the turbine, increases the ideal enthalpy drop of the steam, and thus improves the thermal efficiency of the power plant system.

Main Application Fields

Condensing steam turbines are the most common type used in power plants and marine systems:

 

• Thermal Power Plants: Typically integrated with boilers and generators to form power generation units, converting the chemical energy of fuel into electrical energy.
• Marine Applications: Used as propulsion power plants to provide thrust for ships.

 

YTS's Technical Advantages

1. Customized design. The independently developed high-efficiency steam turbine unit is a multi-stage impulse steam turbine with small enthalpy drop. Different from the steam turbine rotors of other manufacturers, it is designed with 2-4 more pressure stages; the design reduces the flow stage distance, so that more stages are arranged in the flow part, the enthalpy drop of each stage is reduced, the flow diameter is reduced, and the blade height loss is significantly reduced. The turbine flow part also optimizes the profile design of the blades, nozzles, and baffle nozzles, effectively reducing all losses in the turbine flow part, thereby improving the mechanical conversion efficiency of the turbine, and having a wider load adaptability and overload capacity.

 

2. Optimize the blade profile and synchronously match the baffle. Through thermal calculation, follow the law of "energy conservation", match and optimize the original unit design operating parameters with the actual operating conditions, and at the same time, match the new baffle. The purpose is to revise the flow area and improve the flow structure, so that the unit can work effectively and smoothly, thereby achieving the purpose of energy saving and efficiency improvement.
3. All the replacement parts of our company are upgraded according to the original factory materials of the parts, and high-specification configuration is adopted to ensure the safe operation of the unit. The design service life of the main parts is not less than 30 years.

 

4. The overall transformation design and implementation capabilities of the project, with the overall transformation design and implementation capabilities, not only for the main problem points of the flow part of the unit, but also for overall optimization, including auxiliary equipment, electronic control, heat recovery, condensing system, etc., to ensure that the entire power station system achieves operational balance, so as to meet the long-term safety, efficiency and stable operation requirements of the unit.
 

 

 

Simple Maintenance and Less Overhaul Time

The integral rotor and full-circumference steam inlet structure design enable the unit to operate without failure under any load required by the system, with the following main features:

A.	For models with the same rotation speed, direct connection to the generator ensures high efficiency, improving efficiency by more than 5% compared to domestic similar units, with a smaller volume and floor area.
B.	The flow part design and calculation of the steam turbine are more reasonable, and the profile of all blades in the flow part is in line with the most advanced blade profiles in the world, enhancing work efficiency.
C.	The turbine shaft seal and blade tip steam seal adopt internationally advanced seal structures, effectively reducing shaft seal and interstage steam leakage.
D.	The rotor diameter is reduced, the blade length is increased, various contact clearances are further compressed, the steam seal has strong tightness, reducing steam leakage, and steam is fully utilized to do work under the same working conditions, thus achieving high efficiency and more power generation.
E.	Integrally forged rotor assembly structure: The rotor uses an integral forging, which is an integrally forged rigid rotor. The impeller and shaft are integrated, increasing operational safety and stability.
F.	Multi-stage pressure stages: Its unique multi-stage flow design significantly improves the unit efficiency. The optimization of the flow structure enables the unit to output more power and do more work under the same working conditions, directly generating energy-saving economic benefits.
G.	Increase the length and quantity of comb-teeth steam seal from original 36 teeth to 45 teeth, and the tooth height is also increased, which effectively reduces steam leakage;

Operational Characteristics and Technical Advantages

• The internal efficiency of the steam turbine is high, and the steam consumption is low. Compared with the steam turbines of other manufacturers, the designed internal efficiency of the same working condition model is increased by about 5%.
• The designed steam turbine unit has small operation vibration, and the current unit vibration is within 0.015mm.
• The designed steam leakage of the turbine is reduced compared to the traditional models of other manufacturers.
• The regulation system adopts an independent anti-wear hydraulic oil pure electro-hydraulic regulation system. Compared with other manufacturers that use low-pressure oil regulation and emergency protection systems shared with oil stations, the oil motor has a large pulling force, is not prone to sticking, has high regulation accuracy, and fast emergency shutdown response speed. It eliminates the hidden dangers of regulation and safety oil system failures caused by water ingress, emulsification, and deterioration in the shared lubrication oil system, and is more economical and safer than anti-friction oil.

Comparing with similar steam extraction back pressure steam turbine units from domestic market, it can improve efficiency by 10% to 30%, reduce the unit dimension and occupy less space at the same time. The optimization of the flow structure enables the unit to produce more power under the same working conditions, thus generate energy-saving economic benefits.

 

Company Profile

Anhui Yuteshuang Energy Saving Technology Co., Ltd.(YTS) mainly focuses on thermal systems in large-scale manufacturing and high-energy-consuming industrial fields such as chemical industry, steel, coking, cogeneration, papermaking, printing and dyeing, sugar making, metallurgy, and construction materials. It is committed to the development and manufacturing of high efficiency and energy saving steam turbine, technical modification for efficiency improvement of industrial steam turbine flow structure, operation mode conversion, and comprehensive utilization of waste heat and waste pressure for power generation, and supply of second-hand steam turbine generator sets. It is also an investment service enterprise with the capability of overall systemic research, consulting, diagnosis, development, promotion, investment, construction and operation, including the production and supply of energy-saving and consumption-reducing products and the implementation of energy-saving plans. 
Our company currently owns 67 patents of utility model 23 invention patents, including "Energy-saving and consumption-reduction steam turbine" and "Safe noise-reducing steam turbine".
Our company's professional and technical capability, the quantity and quality of its cases are all in a leading position in Chinese domestic market. A single case can generate at least 1000kw/h of energy-saving electricity, and a single project can create more than 4.2 million yuan of energy-saving benefits per year. So far, our company's technical conversion investment projects have achieved the performance of total energy saving electricity of 800 million kWh annually, saved more than 250,000 tons of standard coal, and reduced emissions of carbon oxides and dust by more than 700,000 tons. It brings good economic and social benefits, and at the same time it has achieved a win-win situation for both parties and society.
Our company's core technologies and cases have been listed into National Recommended Catalogue, Guideline and Cases of Industrial Energy-Saving Technologies and Equipments of the Ministry of Industry and Information Technology (MIIT) of China for two consecutive years, National Industrial Power Demand-Side Management Reference Products (Technologies) Catalogue, National Industrial Advanced and Applicable Technologies Catalogue (First Batch), selected as National Energy Conservation Diagnosis Service Provider Recruitment Project for four consecutive years, which are released by Chinese Ministry of Industry and Information Technology (MIIT). Our company has been awarded over 80 national-level and provincial/ministerial-level certifications and honors to date.
Our company wins clients with honesty, and serves clients with high-quality products. Always adhere to the concept of energy saving, high efficiency and environmental protection and develop the new type efficient steam turbine independently. The company provides the one-stop service of scientific R&D, design and manufacturing, engineering installation. Comparing with same type of product in the market, the efficiency of the steam turbine is creased by 7 - 40%.

 

Detailed Photos

Power generation equipment; turbine power generator 

Our Advantages

Our company custom-designs and independently develops high-efficiency condensing steam turbine units, which are multi-stage small enthalpy drop impulse steam turbines. Different from the condensing steam turbine rotors of other manufacturers, the design has 2-4 more pressure stages; the design reduces the distance between flow stages, allowing more stages to be arranged in the flow part. The enthalpy drop of each stage is reduced, the flow diameter is decreased, and the blade height loss is significantly reduced. The flow part of the condensing steam turbine also optimizes the profile design of blades, nozzles, and diaphragm nozzles, effectively reducing all losses in the flow part of the condensing steam turbine, thereby improving the mechanical conversion efficiency of the condensing steam turbine and having a wide load adaptation capacity and overload capacity. This technology was selected into the 2019 China Industrial Energy Conservation Technology and Equipment Recommendation Catalog and Cases issued by the Ministry of Industry and Information Technology of China.

Our company's main technical configuration is to optimize the blade profile of conventional units. Through thermal calculation and following the law of "conservation of energy", the design condition parameters of the original unit are matched and optimized with the actual operating conditions. Meanwhile, new partitions are matched. The purpose is to revise the flow area and improve the flow structure, so that the unit can do work effectively and smoothly, thereby achieving the goal of energy saving and efficiency improvement.

The high-efficiency labyrinth teeth steam seals independently designed by our company have the following characteristics:

1. The labyrinth teeth are lengthened and densified. Based on the original 36 teeth, the density is increased to 45 teeth, and the tooth height is also increased.
2. It has better sealing performance. Tests show that under the same steam seal clearance and pressure difference, the densified labyrinth seal reduces leakage losses by approximately 30%-50% compared to conventional labyrinth seals.
3. It improves the moisture removal capacity in the blade passages of the wet steam region, reducing water erosion on the last few stages of moving blades.
4. It enhances the vibration damping of the shaft, weakens shaft vibrations, and inhibits the formation of steam-induced vibrations.
5. It effectively reduces steam leakage, allowing steam to perform work more efficiently, thereby improving the operational efficiency and safety index of the unit.

Product Service Life
All components of the condensing steam turbine adopt high-specification configurations to ensure safe operation of the unit. The designed service life of major components is not less than 30 years.

Excellent Hardware Processing Support and Testing Capabilities
With modern production workshops, dozens of sets of advanced hardware processing equipment, and a complete range of testing equipment, we can guarantee the processing accuracy of various components. All products undergo strict testing and inspection before leaving the factory, and corresponding reports are issued.

Certficates&honors

 

FAQ

1. Q: How to determine the parameters of steam turbine?
    R: Design steam turbine units with different working conditions according to the customer's current production technical parameters to meet production needs.
2. Q: How to determine the quality of steam turbine?
    R: You can do it through on-site field visits and provide relevant inspection and testing reports and other materials.
3. Q:How to install the steam turbine?
    R: After the steam turbine arrive at your site, we will dispatch relevant technical personnel to your country for on-site installation and debugging.
4. Q: How to ensure after-sales service?
    R: The company's technical staff solves difficult problems online and offline. If needed, our company can our company can dispatch relevant technical personnels to your country for on-site installation and maintenance.