E-fuels, or synthetic fuels produced from green hydrogen and captured CO2, are a promising solution for achieving climate neutrality by replacing fossil in transportation industry. They help reduce greenhouse gas emissions efficiently utilize renewable energy surpluses. This study aims to assess the current state future potential of e-fuel production technologies, focusing on their scalability market integration. A comprehensive literature review trend analysis, including modeling based...

Abstract Adsorption refrigeration systems are able to work with heat sources of temperature starting 50 °C. The aim the article is determine whether in terms technical and economic issues adsorption equipment can as elements that produce cold using hot water from district heating network. For this purpose, examined was air conditioning cooperating drycooler, opportunities offered by network Warsaw during summer. It turns out efficiency device perspective not sufficient for production even...

The steam condenser is one of the most important element in whole power plant installation. Their proper design and operation makes a significant contribution to efficiency electricity production. purpose this article propose two-dimensional mathematical model that allows modeling work. In model, tube bundle treated as porous bed. analysis has been subjected two passes with capacity 50 MW. was compared results experimental studies. average error between experiment for difference cooling...

The diameter and configuration of tubes are important design parameters power condensers. If a proper tube is applied during the unit, high energy efficiency condenser itself can be achieved performance whole generation unit improved. assembly to replaced, one should verify whether chosen correct. Using that too large increases heat transfer area, leading over-dimensioning higher costs building condenser. On other hand, if small, water flows faster through tubes, which results in larger flow...

Abstract The trigeneration systems for production of cold use sorption refrigeration machines: absorption and adsorption types. Absorption are characterized namely by better cooling coefficient performance, while the adsorptive ability to operate at lower temperatures. driving heat source temperature can be as low 60-70 °C. Such allows them in district heating systems. article focuses on presentation research results devices designed work

Abstract The aim of the study was to examine efficiency thermal wave type adsorption refrigerating equipment working on a pair activated carbon and methanol. Adsorption units can work in trigeneration systems applications driven by waste heat. They be built also as part hybrid sorption-compressor systems, they are very popular solar refrigeration energy storage units. device examined this operates special mode called wave. This allows achieve higher rates than normal operation, significant...

The thermal diffusivity of building materials is an extremely important parameter influencing the subsequent comfort users. By definition, describes how quickly heat from a hot source can flow through material. Therefore, this includes both conductivity and capacity This often neglected in heat-related calculations which, case dynamic problems, leads to unreliable results. It should be taken into account that flows all at finite speed. On other hand, knowing correct value materials, it...

Abstract Thermoacoustic refrigerator uses acoustic power to transport heat from a low-temperature source high-temperature source. The increasing interest in thermoacoustic technology is caused due its simplicity, reliability as well application of environmentally friendly working fluids. A typical consists resonator, stack parallel plates, two exchangers and wave. article presents the influence position resonance tube frequency on performance with standing wave driven by loudspeaker, which...

Thermoacoustic refrigerators use acoustic power to transport heat from a low-temperature reservoir high-temperature through stack in resonance tube. These devices nowadays can be considered as an alternative cooling technology they environmentally friendly working fluids and have few moving components. This paper presents the design procedure of small thermoacoustic refrigerator with nominal 10 W. It explains choices reasons for using specific parameters. The strategy applies simplified...

Manufacturers of rotary heat recovery units describe them as a very high efficiency ventilation systems. In real system this device is not usually operated under optimal conditions. This due to the daily and annual changes in temperature relative humidity. order determine parameters exchanger mathematical model was constructed then implemented development environment. The paper presents modeling results job unit working conditions with regard temperature, air velocity rotor speed. It turns...

Abstract Mechanical vibrations from heavy machines, building structures, or the human body can be harvested and directly converted into electrical energy. In this paper, potential to effectively harvest mechanical locally generate energy using a novel piezoelectric-rubber composite structure is explored. Piezoelectric lead zirconate titanate bonded silicone rubber form cylindrical composite-like harvesting device which has structurally dampen high acceleration forces power. The was...

Abstract The internal diameter of a tube in ‘church window’ condenser was estimated using an entropy generation minimization approach. adopted model took into account the due to heat transfer and flow resistance from cooling-water side. Calculations were performed considering two equations for coefficient four different roughness values tube. Following analysis, obtained range 17.5 mm 20 (the current is 22 mm). calculated depends on positively related assumed model.

Experimental and theoretical studies on heat mass transfer in anti-condensation coatings Anti-condensation are widely used refrigeration, air conditioning ships technology. They can store a certain amount of water its own volume, then return it back favorable conditions. also to protect structures from the moisture. This paper presents results experimental research an coating under natural forced convection. obtained for horizontal inclined plates. data compared with different models computation.

The paper concerns in particular gas engine driven heat pump. It presents where the industry pump is used with a mechanical drive. There are mentioned main directions of development and first all pumps by engine. provides an overview advantages disadvantages this approach circuit diagrams reproduced powered Simple comparison shows emissions for creation electricity (electric motor) power (gas engine). A review applications Poland abroad presented. basic parameters systems, principles...

Abstract In automotive industry plants, which use injection molding machines for rubber processing, tar contaminates air to such an extent that fails enter standard heat recovery systems. Accumulated clogs ventilation exchangers in just a few days. the plant research was conducted, contamination causes blockage of ducts. The effect this phenomenon every half year channels had be replaced with new ones, since economic analysis has shown cleaning them is not cost-efficient. Air temperature...