Product Introduction

In some industries, such as petrochemical, steel, paper-making… etc., there is a lot of hot water, steam or gas generated in production process. Usually, all these heat resources will be discharged or cooled. It is not only polluting the atmosphere but also waste the latent heat…

Fossil fuel reserves depleted rapidly. There are many concerns about nuclear safety. How to use renewable energy, such as geothermal, biomass, solar energy source effectively?

High-pressure transmit and low-pressure use is the key features of steam. It mostly equips PRV in use site if there is heat demand in following process. However, the energy loss of the pressure is also the economic loss…

Today, these waste heat sources are all useful for screw expander generator. The screw expander provides a renewable power solution by converting low, medium and high temperature heat into electrical energy. It can achieve energy saving and environment protection. Undoubtedly, it is an efficient, clean and reliable way to achieve energy saving and environment protection.

Isentropic Efficiency More Than 70%

Kerry® Kaishan screw expander can reach up to 70% and higher. The isentropic efficiency of the general small/medium turbine in using saturated vapor as well as other expanders modified from compressor technology is about 55%. It means Kerry® Kaishan screw expander can generator more 30% power. The isentropic efficiency of Kerry® ORC screw expander power plant is even up to 85%~88%.

Avoids ”Water Impact” damage with higher reliability

When saturated vapor is expanded, vapor carrying liquid and gas, the small water drops will hit the blade at high speed, which we call “Water Impact”. Our steam screw expander use screw instead of impeller to avoid water impact damage, which substantially enhance in reliability.

Fits any potential waste heat

Kerry® Kaishan screw expander is able to recover and generate power from a broad range of thermal heat sources, including superheated steam, saturated vapors, two phases, hot water and other hot liquids. Steam turbine has difficulty to use the saturated steam flow rate of 2-3t/h to generate power. However, Kerry® Kaishan screw expander has overcome such short-coming.

Excellent performance of varying duties

Kerry® Kaishan screw expander can work well in unstable/fluctuating heat sources condition compared with the steam turbine. It is the best advantage of Kaishan screw expander.

Lower infrastructure and overall costs

Initial and overall cost for Kerry® Kaishan screw expander is lower. It can be installed in outdoor with small foundation. However, stream turbine have to be installed in inside building with bigger foundation and infrastructure.

Operation Wise

Kerry® Kaishan screw expander operator easily unattended, concurrently reduce the operation cost. In comparison, stream turbine needs at least a small team to monitor and operate.

The most important – Kerry® Kaishan screw expander can work in series to achieve higher efficiency

The most important is Kerry® Kaishan screw expander generator can working in series to achieve higher efficiency in according to customer conditions. For example, steam expander uses the pressure difference while ORC uses the latent heat of vaporization to generate power.