Natural Gas Pressure Differential Power Generation And Refrigeration Systems

Natural gas pressure differential power generation and refrigeration technology harnesses the pressure energy of pipeline networks — converting it into electricity while simultaneously producing usable cooling energy. This reduces pressure energy losses, minimises pipeline vibration and noise, and enhances network stability.

The principle is simple: high-pressure natural gas passes through a radial turbo-expander, converting pressure energy into mechanical energy, which drives a generator to produce electricity. No gas is burned. No emissions are produced. Zero-carbon output, from inlet to grid.

From Wasted Pressure to Measurable Value

Electricity

The turbo-expander recovers pressure energy from the pipeline and converts it directly into zero-carbon electricity — no gas burned, no fuel consumed.

Cold Energy

As gas expands, its temperature drops significantly. A heat exchanger captures this cold energy and delivers it to wherever cooling is needed — also zero-carbon.

Carbon Footprint

Pressure energy previously wasted across throttle valves is now converted into electricity and cooling — raising energy efficiency and reducing the enterprise's carbon footprint.

High-pressure natural gas must be throttled down before distribution. Instead of wasting that pressure drop, we convert it into usable energy.

How Pressure Differential Energy Recovery Works

High-pressure natural gas must be throttled down before distribution. Instead of wasting that pressure drop, we convert it into usable energy.

High-Pressure Gas Inlet

Natural gas enters the system at high pressure from transmission pipelines (typically under 10 MPa), carrying unexploited pressure energy that would otherwise be wasted across throttle valves.

Turbo-Expander Generator

A precision turbo-expander converts the pressure drop into shaft rotation, driving a generator to produce clean electricity — zero fuel, zero emissions.

Simultaneous Refrigeration

As the gas expands, the Joule–Thomson effect causes its temperature to drop sharply. High-efficiency heat exchangers capture this cold energy and deliver it as usable cooling for downstream applications — with zero additional energy input.

Low-Pressure Gas Outlet

The outlet low-pressure gas exits at stable pressure and temperature, fully meeting downstream distribution requirements and regulatory standards.

What we offer

Our Core Systems

Modular systems, each customised to your pipeline specifications and site conditions.

300 kW Unit

Compact unit for small-to-medium gas pressure-reduction stations. Converts a single pressure drop into clean electricity and usable cooling energy.
Output: 300 kW
Cooling capacity: 300 kW
Expander efficiency：≥86%
Turbine speed：40000 rpm
Inlet pressure: Under 10 MPa
Modular & scalable design
Fully automated control

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500 kW Unit

Mid-range unit for city-gate stations and industrial users with higher flow rates.
Output: 500 kW
Cooling capacity: 500 kW
Expander Efficiency：≥86%
Turbine speed：40000 rpm
Inlet pressure: Under 10 MPa
Modular & scalable design
Fully automated control

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1000+ kW Unit

High-capacity unit for major pipeline hubs, gas storage facilities, and petrochemical plants.
Output: ≥1000 kW
Cooling capacity: ≥1000 kW
Expander efficiency：≥87.5%
Turbine speed：40000 rpm
Inlet pressure: Under 10 MPa
Modular & scalable design
Fully automated control

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GYXTW

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Break Out Pigtail

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FTTH Duct cable

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Project Prerequisites

Our systems are designed for a wide range of natural gas pressure-reduction sites. If your project meets the following baseline conditions, it is well-suited for pressure-difference power generation and refrigeration.

Expansion Ratio ≥ 1.1, Gas Flow Rate > 10,000 Nm³/h, Available Site Area > 50 m²

Our Solution

Tailored Solutions for Your Business

Whether you produce, transport, or consume natural gas, our systems turn pressure energy into value.

Gas Producers, Transporters & Distributors

Every pressure-reduction point in the supply chain — from wellheads to city gate stations — is a potential power plant. Our systems recover this wasted energy to deliver on-site electricity and cooling, cutting costs and creating new revenue streams. City Gate Stations & Pressure-Regulating Stations (PRS) Gas Processing Plants & Compressor Stations Underground Gas Storage Facilities Pipeline Transmission Hubs with Pressure Letdown Distribution Network Pressure-Reduction Points

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Large-Scale Natural Gas End Users

Industrial facilities that receive high-pressure natural gas must reduce pressure before use. Our systems recover this unavoidable pressure drop to generate on-site electricity and cooling — reducing grid dependence and lowering operating costs. Power Plants & Cogeneration Facilities Chemical & Petrochemical Complexes Steel & Metallurgical Plants Ceramic, Glass & Building Materials Manufacturers Food Processing & Pharmaceutical Factories

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WHO WE ARE

A technology-driven company powered by R&D and innovation.

Founded in 2020, Joulong Energy is a Sino-academic joint venture commercializing cutting-edge tech from the Chinese Academy of Sciences. We specialize in converting wasted natural gas pipeline pressure into clean electricity and cooling.
Through the development and integration of our proprietary Pressure-to-Power systems, we help industrial clients drastically improve energy efficiency and cut carbon emissions, driving progress toward a more sustainable energy future.