BOMAT Expands Heat Exchanger Portfolio for CHP Systems from 150 to 1,500 kW

BOMAT Energiesysteme GmbH, a German manufacturer specializing in corrosion-resistant heat recovery technology, has expanded its product lineup for combined heat and power (CHP) installations, including those operating on biogas and sewage gas. The enhanced range now addresses smaller installations starting at 150 kW and scales up to 1,500 kW, providing operators with strategic options: capture waste heat from exhaust streams for productive use, or implement fuel-saving retrofits that lower emissions.

Constructed with high-performance composite piping, BOMAT heat exchange systems support two distinct efficiency pathways: waste heat valorization for revenue or energy savings, and operational retrofits that reduce fuel dependency. Both approaches typically deliver thermal performance gains averaging 10%.

By capturing otherwise-lost thermal energy, BOMAT systems increase the effective output of CHP installations while decreasing dependence on supplementary fuel and lowering overall emissions. For facilities interested in monetizing recovered heat, the expanded product range provides scalable, economically viable options—whether offsetting internal heating expenses or supplying energy to district heating networks.

“Our systems recover thermal energy while simultaneously reducing operational expenses,” explains Volker Wiersbitzki, sales engineer at BOMAT Energiesysteme GmbH. “When deployed in fuel-saving configuration, consumption drops by up to 15% for natural gas applications and up to 10% for oil-fired systems. This typically generates payback within four years.” The technology also cuts acidic emissions by up to 60% and reduces CO₂ output by as much as 15%, supporting regulatory compliance and sustainability objectives.

In real-world applications, operators are converting waste heat into tangible value: German municipalities heat public swimming facilities, food producers such as bakeries use recovered energy for process water and space conditioning, while wastewater treatment plants integrate it into existing thermal systems. Beyond direct cost savings, heat recovery reduces fuel requirements and strengthens sustainability performance.

Built for Harsh Operating Environments

CHP systems running on biogas and sewage gas generate highly corrosive exhaust streams at elevated temperatures—a challenge BOMAT addresses through strategic material selection. The company’s engineering team selected heat exchanger tubes fabricated from a high-performance composite combining polyphenylene sulfide (PPS) and graphite (GR). This material pairing delivers exceptional chemical resistance alongside strong thermal conductivity, enabling BOMAT heat exchangers to function reliably below the acid and water vapor dew point—conditions where conventional stainless steel equipment frequently deteriorates.

Engineered to handle exhaust temperatures reaching 400°C under cooling conditions, BOMAT exchangers incorporate a fouling-resistant surface finish and a modular slide-in register architecture that streamlines maintenance procedures. Individual heating elements can be extracted without complete system disassembly, minimizing operational interruptions and ensuring sustained performance under continuous operation.

Operating Principle

Hot exhaust gases flow through PPS-GR modules within the BOMAT heat exchanger, transferring thermal energy to a secondary fluid such as water or water-glycol solution. The superior thermal conductivity of PPS-GR tubing ensures effective heat transfer. As exhaust gases cool, water vapor and acidic constituents condense, capturing latent heat while reducing airborne pollutants. The modular architecture facilitates routine cleaning and inspection, maintaining consistent performance in challenging operating conditions.

Democratizing Advanced Heat Recovery Technology

The broadened product range extends high-efficiency heat recovery and fuel-saving retrofits to a wider spectrum of CHP installations. Newly introduced models address smaller facilities that previously lacked suitable solutions for corrosive exhaust environments, delivering the same proven technology deployed in larger systems. BOMAT systems start at €16,500 depending on configuration. The retrofit-compatible design minimizes installation expenditure, positioning BOMAT as a practical upgrade for CHP plants across the size spectrum.

BOMAT heat exchangers integrate seamlessly into existing CHP infrastructure and are typically installed as the final component in the exhaust pathway. Recovered thermal energy feeds into established heating systems or serves process heating requirements.

Beyond its primary CHP focus, BOMAT supplies heat recovery solutions for industrial furnaces, including melting and heat treatment equipment where exhaust gases often represent untapped energy resources. Many systems are custom-engineered for specific project parameters, demonstrating BOMAT’s technical adaptability and application expertise. The company also produces condensing heat exchangers and neutralization systems for OEM clients. BOMAT’s solutions serve municipal infrastructure, industrial processes, and energy systems where they exemplify the precision and durability characteristic of German engineering.

BOMAT will showcase its expanded model range at the Biogas Convention in Nuremberg, December 9-11, 2025.

About BOMAT GmbH

Established in 1982 and based in Überlingen, Germany, BOMAT Energiesysteme GmbH manufactures corrosion-resistant flue and exhaust gas heat exchangers for combined heat and power systems and industrial applications. The company specializes in ceramic and PPS-GR-based condensing technology engineered for demanding conditions including biogas and sewage gas combustion. As a member of the puren-group, BOMAT delivers innovation, engineering versatility, and German manufacturing precision through energy-efficient solutions that reduce fuel consumption, emissions, and operating costs. With more than 85,000 completed projects, over 10,000 customers, and presence in more than 40 countries, BOMAT serves as a trusted partner in heat recovery technology.