Issue 03/2023 (March)

BioLNG in terms of properties is almost the same medium as LNG. The differences are due to the source of both. In our country,LNG production is minimal compared to countries such as the United States, Qatar or the United Arab Emirates. However, it turnsout that in the case of bioLNG, there is potential in our domestic resources that can be exploited for the production of fuel witha negative carbon footprint. The following article will discuss 2 issues in bioLNG production: how to do loading of bioLNG onto cryogenic tankers with ensuringprocedures related to legal metrological control, and how to control the liquefaction process of biomethane to secure process facilities using TDLAS technology.

The widespread introduction of gas condensing devices ensures high energy efficiency and is classified as a heating device with a closed combustion chamber. The high efficiency of these devices results from the use of special concentric chimney systems.The effect of this is a chimney heat exchange, because the heat from the flue is transferred to the concentric air duct, which causes the heated air to be supplied to the combustion chamber. When using this type of equipment, not only energy efficiency issues are equally important, but also the safety aspects of their use by eliminating the risk of carbon monoxide poisoning. The article presents the constructions of air-flue gas systems used for gas appliances with a closed type C combustion chamber.

One of the challenges of the energy transformation and European Union climate policy is the introduction of electromobility,thus ensuring appropriate levels of critical raw materials supply. In the context of the automotive market electrification, the productionof lithium-ion batteries used to power modern electric vehicles is of particular importance. A promising alternative tothe critical metals acquisition – lithium and cobalt from natural resources is their recovery from polymetallic waste Li-ion batteries,which would allow for the diversification of raw material sources and their reuse following the circular economy principles.

Heating water for hot water supply accounts for about 20% of a standard home’s total energy consumption, with most of the load going to heating water for bathing or showering. The cost of hot water generally ranks second in terms of housing and utilities in residential buildings, second only to the cost of heating. Studies have shown that a person needs 1/10 of the water used in a shower for hygiene procedures. Thus, about 90% of the hot water supplied to the shower tap is discharged into the sewage system. Reusing energy from wastewater will save heat energy and reduce the total cost of hot water. The article is devoted to studying the use of heat recovery frdomestic wastewater to increase the energy efficiency of buildings.

Nowadays, due to the progressing water deficit, increasing attention is paid to the possibility of retaining rainwater at theplace where precipitation occurs. In terms of selecting the method for local rainwater management, the financial profitability of the investment is a very important issue for an investor. In the article, the profitability of two methods of drainage theselected facilities of the wind power plant is analyzed. The solutions with an absorbing well and infiltration boxes were taken into account. The indicators of financial profitability classified as discount methods were used in the analysis. The investigation made it possible to determine the relationship between investment costs and profits in terms of achieving investment viability. The analysis concerns the specific object, so its results are not universal. However, they can be helpful in the case of similar investments, which is especially important because of the fact that draining rainwater from selected wind plant facilities is necessary.