H-25 Series

Middle and Small Capacity Gas Turbines - For 50Hz / 60Hz

High reliability gas turbines for industrial customers

CATALOGUE: GTCC Power Plants

Features

Standalone Gas Turbine Output: 40MW class

Combined Cycle Output: 60MW / 120MW class

Co-generation Efficiency: More than 80%

Total commercial operating hours

Over 12.5 million hours

As of January 2025

Highest-in-class thermal efficiency for mid-to-small scale gas turbines.
Exceptional reliability proven by cumulative operation records of more than 12.5 million hours.
Optimized heat recovery performance ideal for cogeneration systems.
Superior cost-effectiveness through long-life design and easy maintenance.

Featured Case Studies

Contributes to Taiwan’s energy policy objectives through enhanced plant efficiency and reduced CO₂ emissions

Mitsubishi Power has received an order for an H-25 gas turbine from Chang Chun Petrochemical. By converting existing heavy oil and coal-fired boilers to high-efficiency natural gas-fired H-25 gas turbine systems, we will contribute to reducing CO₂ emissions.

Read the full story

Overview

The H-25 Series gas turbines are a heavy duty type that attains high efficiency on the basis of ample experience in manufacturing gas turbines.

They achieve high efficiency with heat recovery steam generators, as co-generation systems or combined cycle power plants.

The H-25 Series features simple cycle gas turbine output of 41 MW and a combined cycle output of around 60 MW for a 1 on 1 configuration and around 120 MW for a 2 on 1 configuration. When applying cogeneration, they supply a maximum of around 70 metric tons of steam per hour.A compressor shaft end drive reduces the effect of thermal expansion on alignment

Heavy duty structure: A highly reliable structure in consideration of ease of maintenance and long continuous operation
High efficiency: High performance in various power generation cycles (simple, combined and co-generation)
Fuel flexibility: Natural gas, off gas, light oil, kerosene, bio-ethanol, etc.
Package type: Easy to transport and install

Configuration

		H-25
Compressor	Number of Stages	17
Combustor	Number of Cans	10
Combustor	Cooling Method	Air Cooled
Turbine	Number of Stages	3
Rotor	Number of Rotors	1
Output Shaft		Cold End
Rated Speed		7,280 rpm
Gas Turbine	Approx. L × W × H	7.9 × 3.8 × 3.9m
Gas Turbine	Approx. Weight	55 ton

Simple Cycle Performance

		H-25
Cycle		50/60 Hz
ISO Base Rating		41.0 MW
Efficiency		36.2 % LHV
LHV Heat Rate		9,949 kJ/kWh
LHV Heat Rate		9,432 Btu/kWh
Exhaust Flow		114 kg/s
Exhaust Flow		253 lb/s
Exhaust Temp		569 °C
Exhaust Temp		1,056 °F
Emission	NOx	15 ppm@15%O₂
Emission	CO	9 ppm@15%O₂
Turn Down Load		50 %
Ramp Rate		3.4 MW/min
Starting Time		22 minutes

Combined Cycle Performance

		H-25
1 on 1	Plant Output	60.1 MW
1 on 1	Plant Efficiency	54.0% LHV
2 on 1	Plant Output	121.4 MW
2 on 1	Plant Efficiency	54.5% LHV
Starting Time		55 minutes

Performance Correction Curves

Effects of Compressor Inlet Temperature on Gas Turbine Performance (Typical)

Effects of Barometric Pressure on Gas Turbine Performance (Typical)

Package Design

The package design of the H-25 Series has the following advantages.

Minimize on-site installation work and time
Flexible layout
Short delivery period

Weight

	Package	H-25
1	Gas Turbine	55 ton
2	Lube Oil Tank, Reduction Gear and Auxiliaries	63 ton
3	Generator	83 ton
4	Air Intake System	36 ton
5	Exhaust System (excluding silencer duct, stack)	8 ton

Typical Plant Layout: Simple Cycle

Typical Plant Layout: Co-generation

Typical Plant Layout: 1 on 1 Combined Cycle

Typical Plant Layout: 2 on 1 Combined Cycle

A co-generation plant with the H-25 Series gas turbine produces the highest steam supply volume in the turbine class and high thermal efficiency.
We offer system engineering in response to a request for a combination of electric power and steam.

	H-25
Power Output	39.6 MW
Heat Output (6 MPa / 300 deg C)	79 ton/h
Overall Efficiency (LHV)	More than 80 % LHV

The figures specified above represent gross performance figures for gas fuel under ISO conditions (atmospheric pressure of 1,013 hPa, atmospheric temperature of 15°C and relative humidity of 60%).

System Configuration

Steam Flow without HRSG Supplementary Firing

Steam Flow with HRSG Supplementary Firing

Delivery Records Example

C.A. Electricidad de Valencia

Country/Region	Venezuela
Plant	Planta Castillito
Plant specifications × Qty	Simple cycle × 1
Year of operation	2006 started

PetroChina International Jabung Ltd

Country/Region	Indonesia
Plant	Betara Gas Plant
Plant specifications × Qty	Co-Gen x 3+1
Year of operation	2006-7, 2018 started

Hitachi Ltd

Country/Region	Japan
Plant	Rinkai Power Station
Plant specifications × Qty	Simple cycle × 2
Year of operation	2006 started

Bahamas Electricity Corporation

Country/Region	Bahama
Plant	Blue Hills Power Station
Plant specifications × Qty	Simple cycle x 5
Year of operation	2002,3,6,7,13 started

Other Delivery Records

Client / Plant	Country/Region	Year of starting operation	Plant specifications × Qty
Chang Chun Pertoichemical Co.Ltd / Miaoli 1&2	Taiwan	Under Construction	Cogeneration x 2
Chang Chun Plastics Co.Ltd Dafa	Taiwan	2026	Cogeneration ×1
Dongguan Texwinca Textile & Garment Ltd. / Dongguan Texwinca CHP Project	China	Under Construction	Co-generation × 1
Qingdao Gaoxin Thermoelectricity Co. Ltd. / Gas- Steam Combined Cycle Co-generation Project	China	Under Construction	Combined cycle × 2
Lee & Man Paper Factory Co., Ltd /　Dongguan Lee & Man Paper Factory Co., Ltd. CHP Project	China	2021	Co-generation × 1
China Resources Power (ZhuHai) Co., Ltd./ China Resources Power (ZhuHai) Co., Ltd. Natural Gas Distributed Energy Project	China	2022	Combined cycle × 2