Lämpöentalteenottomenetelmä

Lämpöentalteenottomenetelmä, often translated as heat recovery or heat recovery method, refers to a range of technologies and processes designed to capture and reuse waste heat that would otherwise be lost. This recovered heat can then be utilized for various purposes, such as heating buildings, preheating water, or even powering industrial processes. The primary goal of lämpöentalteenotto is to improve energy efficiency by reducing the need for primary energy sources.

There are several common methods employed in lämpöentalteenotto. Heat exchangers are a fundamental component, allowing heat to transfer from a warmer medium to a colder one without direct contact. This can be seen in systems where exhaust air from a building is used to preheat incoming fresh air, or in industrial settings where heat from a hot liquid stream is used to warm a cooler one. Another approach involves using heat pumps, which can absorb low-grade heat from sources like ambient air, soil, or wastewater and upgrade it to a higher temperature for heating purposes. Energy recovery ventilators (ERVs) and heat recovery ventilators (HRVs) are specifically designed for building ventilation, recovering a significant portion of the heat from outgoing stale air to warm incoming fresh air. In industrial applications, waste heat can be captured from flue gases, cooling water, or process streams. The implementation of lämpöentalteenotto is driven by economic benefits, such as reduced energy costs, and environmental considerations, like lowered greenhouse gas emissions.