Cogeneration, as an efficient method of energy production, is becoming an increasingly important topic in the context of efforts to improve energy efficiency. In this article, we analyse its potential to support sustainable development and provide practical guidance on its effective use in various industrial sectors.
Role and applications of cogeneration
Cogeneration, also known as combined heat and power (CHP), is an efficient energy-generation process that enables the simultaneous production of heat and electricity in a single unit or installation. This integrated energy process uses waste heat generated during electricity production for heating or cooling purposes, significantly increasing the efficiency with which primary energy is used. Cogeneration uses a range of technologies, such as gas turbines, internal combustion engines, steam boilers and CHP systems fuelled by biomass or natural gas, which can be adapted to specific needs and local conditions. The benefits of this process include higher energy efficiency, lower greenhouse gas emissions and greater energy independence, making cogeneration an important tool in the pursuit of sustainable development and the optimal use of energy resources.
When does cogeneration become economically viable?
Cogeneration, also known as co-generation, has long been regarded as one of the most efficient solutions for energy production. But when exactly does it become economically viable? In conventional power plants, the thermal energy generated during electricity production is often wasted. Cogeneration instead enables electricity and heat to be produced simultaneously, thereby increasing overall energy efficiency. The key to cogeneration’s economic viability is the ability to make full use of the recovered heat. In winter, this heat can be used to heat buildings, production halls or other spaces. However, the real financial benefits arise when the heat can also be used effectively during the summer months. In summer, the recovered heat can be converted into cooling using absorption chillers, which provide cooling for buildings or industrial processes. Another option is to generate steam for industry, where it is essential for many processes. For this reason, cogeneration becomes economically viable primarily for companies with a constant year-round demand for heat or cooling. By using recovered heat not only in winter but also in summer, these companies can significantly reduce their energy bills. The environmental aspect should not be overlooked either. Thanks to cogeneration’s higher energy efficiency, harmful greenhouse gas emissions are significantly lower than with conventional energy-production methods. This means that investment in cogeneration not only brings financial benefits but also contributes to environmental protection.
Cogeneration and mandatory energy audits
Cogeneration, as an advanced energy-generation technology, plays a key role in improving the energy efficiency of companies. By generating heat and electricity simultaneously, cogeneration enables optimal use of primary energy, minimizing losses and reducing fuel consumption. This integrated energy process allows companies not only to reduce energy-related operating costs but also to cut greenhouse gas emissions, thereby contributing to an improvement in environmental conditions. In the context of energy-efficiency requirements in Poland, companies are required to carry out an energy audit aimed at identifying areas where energy efficiency needs to be improved. However, instead of treating this mandatory company energy audit as a one-off exercise, companies can use it as a starting point for implementing cogeneration-based solutions. Integrating cogeneration into a company’s energy strategy can not only deliver measurable financial benefits through energy savings and lower operating costs, but also support sustainability and energy-efficiency objectives.