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Energy Trend Knowledge Base

Practical articles on energy audits, energy costs and modernisation — written by Energy Trend’s auditors and engineers.

  • Energy Efficiency in Industry, Energy technologies

Industrial heat pumps – when do they make sense and how do you assess feasibility?

An industrial heat pump should not be selected on the basis of unit capacity or catalogue COP. Selection should start from a matched heat source–heat sink pair. Project success depends on temperatures, hourly and seasonal profiles, simultaneous operating time, available electrical capacity, the heat transfer

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  • Energy Efficiency in Industry

Circular economy in business – how to move from an idea to concrete action?

Circular economy in business starts with a balance of raw materials, products, waste and water, not with recycling alone. This article shows how to identify costly streams, determine the causes of losses and compare consumption reduction, reuse, recovery, regeneration and the use of by-products. It

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  • Energy Measurements

Blower Door test for building airtightness – when to perform it and how to interpret the result?

A Blower Door test for building airtightness shows how much air passes through the building envelope under a controlled pressure difference and makes it possible to determine, among other things, the n50 air change rate. The numerical result must, however, be interpreted together with the

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  • Energy Efficiency in Industry

Corporate carbon footprint – how to calculate it and what data are required?

Calculating a corporate carbon footprint starts with defining organizational boundaries and collecting the right data, not with choosing a calculator. This guide shows what information to prepare for Scope 1, Scope 2 and Scope 3, how to select emission factors, and how to document data

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  • Energy audits, Energy Measurements

Compressed Air System Audit

A compressed air system audit should cover the entire system – from compressors and air treatment, through air receivers and the distribution network, to end uses. The measurement scope is selected to match the problem and operating profile, so energy, flow, pressure, dew point, air

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  • Energy costs, Financing and regulations

Technical and economic analysis of heat cost allocators

A heat cost allocator does not measure thermal energy, so the price of the devices alone is not enough to assess whether their use is justified. The analysis should examine the heating system layout, the condition of the building, radiators and risers, the method of

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  • Financing and regulations, Polish white certificates

White Certificates in Poland – how the energy efficiency certificate system works and when it can be used

White certificates in Poland make it possible to link an energy-efficiency improvement project with the additional value of transferable property rights. The sequence of actions is crucial: the audit and the application to URE must be prepared before the statutory “start of works”. We explain

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  • Energy audits, Lighting

Street lighting and indoor lighting audits – how do they differ and what should be checked?

Street lighting and indoor lighting audits require different approaches to inventory, measurements and assessment. This article explains what data to collect for lighting points and road geometry, and how to prepare measurements in production halls, warehouses, offices and other interiors. It also explains which elements

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  • Energy audits

Mandatory company energy audit in Poland – who is covered, what is the scope and how should a company prepare?

Check whether your company is subject to the mandatory company energy audit in Poland and how to determine its status correctly on the basis of the last two financial years. We explain the 90% scope, deadlines, ISO 50001/EMAS exemptions, obligations towards the Polish Energy Regulatory

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