The mathematical modelling of the absorption refrigeration machines used in energy systems

Rusowicz, А.

doi:10.15199/8.2018.2.4

Cited by 4 publications

(4 citation statements)

References 1 publication

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“…In Poland, thermo-modernization programs are very well developed, aimed at reducing energy consumption, and thus reducing air pollution. Unfortunately, not everything has been achieved yet (Owczarek & Baryłka, 2019;Rusowicz & Ruciński, 2011;Kajurek et al, 2019). While the quality of outdoor air in the current legal system in Poland is difficult to improve, it becomes very important to maintain good indoor air quality.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Possibilities of Improving Environmental Conditions in Lecture Halls Using Mechanical Ventilation

Grzebielec

Szelągowski

Bruzi

2020

The 11th International Conference ENVIRONMENTAL ENGINEERING 11th ICEE SELECTED PAPERS

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Didactic classes are conducted in lecture halls usually adapted from the technical side to present content. Audiovisual and sound systems are installed. Unfortunately, in many cases, classrooms are designed from the point of view of air conditioning and ventilation, just like office rooms. As a result, during classes, even in rooms where air conditioning occurs, the conditions change so unfavourably that both teacher and students experience discomfort. The work analyzes the change in temperature, CO2 concentration, PM2.5 concentration and relative humidity in the room, where heat gains from people and equipment as well as moisture gains exceed design values. The work uses a channel-free Respireco recuperator with cyclic operation. First, the thermodynamic properties of the recuperator itself were checked, and then it was tested in a selected Polish primary school. The results show that this type of recuperators are able to provide correct indoor climatic conditions in lecture halls. The use of mechanical ventilation using a recuperator with a ceramic heat recovery caused the CO2 concentration in the room to drop by 50% during classes. However, PM2.5 concentration was maintained at a level three times lower than in a room without mechanical ventilation. It should therefore be concluded that the use of mechanical ventilation with recuperation not only reduces heating costs but also significantly improves air quality.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Possibilities of Improving Environmental Conditions in Lecture Halls Using Mechanical Ventilation

Grzebielec

Szelągowski

Bruzi

2020

The 11th International Conference ENVIRONMENTAL ENGINEERING 11th ICEE SELECTED PAPERS

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“…Some ways of using waste heat sources are known, such as absorption and adsorption technologies [2,3]. Currently, thermoelectrics is one of the latest technologies recognized in many applications.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Generation Of Current – Theoretical And Experimental Analysis

Ruciński

Rusowicz

2017

Archives of Thermodynamics

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This paper provides some information about thermoelectric technology. Some new materials with improved figures of merit are presented. These materials in Peltier modules make it possible to generate electric current thanks to a temperature difference. The paper indicates possible applications of thermoelectric modules as interesting tools for using various waste heat sources. Some zero-dimensional equations describing the conditions of electric power generation are given. Also, operating parameters of Peltier modules, such as voltage and electric current, are analyzed. The paper shows chosen characteristics of power generation parameters. Then, an experimental stand for ongoing research and experimental measurements are described. The authors consider the resistance of a receiver placed in the electric circuit with thermoelectric elements. Finally, both the analysis of experimental results and conclusions drawn from theoretical findings are presented. Voltage generation of about 1.5 to 2.5 V for the temperature difference from 65 to 85 K was observed when a bismuth telluride thermoelectric couple (traditionally used in cooling technology) was used.

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“…On the one side, regulations prohibit the use of another refrigerants commonly used in the compressor type of refrigeration Kuczyński et al 2013;Rusowicz et al 2014;Śmierciew et al 2017). On the second side, adsorption units are able to work at lower heat sources temperatures than the absorption units types (Fernandes et al 2014;Lucia 2013;Rusowicz, Ruciński 2011). On the third side technical solutions should increase general energy conservation coefficient (Ruciński et al 2016;Rusowicz et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of Outside Temperature on the Operation of the Adsorption Chiller

Grzebielec

Laskowski

Ruciński

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Adsorption refrigeration systems are characterized by a lower coefficient of performance than the compressor type device or even absorption, but can utilize waste heat at lower temperature. The aim of the study was to determine which external parameter has the greatest impact on the efficiency of the adsorption device. As a result of experimental studies there was found that this is not the temperature of the feed but particularly the temperature of external air. For this reason, it is recommended that the adsorption device should cooperate with evaporative spray coolers, instead of with popular dry coolers. This solution will increase annual efficiency of adsorption unit approx. by 25% and significantly reduce the costs of cold generation.

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The mathematical modelling of the absorption refrigeration machines used in energy systems

Cited by 4 publications

References 1 publication

Analysis of the Possibilities of Improving Environmental Conditions in Lecture Halls Using Mechanical Ventilation

Analysis of the Possibilities of Improving Environmental Conditions in Lecture Halls Using Mechanical Ventilation

Thermoelectric Generation Of Current – Theoretical And Experimental Analysis

Influence of Outside Temperature on the Operation of the Adsorption Chiller

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