Thermocompressor and Boosters

Thermocompressor and Boosters

Reliable Vacuum Service for the Process Industries


Thermocompressor are a form heat recovery equipment used to boost low-pressure steam to higher pressures for reuse in additional applications. This equipment maximizes energy efficiency by reclaiming the latent heat energy of a low-pressure steam; compressing the vapor load to meet higher pressure and temperature requirements.

Thermocompressors are a type of ejector. Structurally, they are composed of four major parts (steam chest, motive nozzle, nozzle holder, and diffuser) and can be designed in single, multiple, or adjustable nozzle configurations. What differentiates thermocompressors from other ejectors is the target application of this equipment. The primary objective of a thermocompressor is to conserve energy within a system by converting “spent” steam into useful steam. Thermocompressors take advantage of low-pressure steam can be utilized as the motive and suction input to reduce resource consumption and support steam supply networks.


Thermocompressor and Boosters

Thermocompressors take pressure energy of motive steam and convert it into kinetic energy (high velocity steam), which entrains and then compresses the low pressure spent steam, converting it back to pressure energy. The motive steam is piped into a steam chest and expanded through a converging-diverging nozzle. This high velocity steam entrains the steam entering the low-pressure steam into suction chamber and the mixed process and motive steam are then compressed to an intermediate pressure as they pass through the diffuser (throat). The diffuser acts as a nozzle in reverse, reconverting velocity energy to pressure energy.

The precise dimensions and arrangement of thermocompressors components are expertly engineered to govern velocity/pressure conversions. The diffuser’s geometry moderates the outflow conditions of the mixed stream to the end-state required by the process. Thermocompressors can be designed to achieve specific outlet conditions of mass flow rate and temperature or meet certain suction flow rates with specific suction and discharge pressures.