Temat: CO2 heat pump - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Operating characteristics of transcritical CO2 heat pump for simultaneous water cooling and heating
Autorzy:: Sarkar, J.
Bhattacharyya, S.
Powiązania:: https://bibliotekanauki.pl/articles/240930.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: charakterystyki pracy
eksperyment
pompa ciepła
symulacja
CO2 heat pump
experiment
performance characteristics
simulation
Water cooling and heating
Opis:: The effects of water-side operating conditions (mass flow rates and inlet temperatures) of both evaporator and gas cooler on the experimental as well as simulated performances (cooling and heating capacities, system coefficient of performance (COP) and water outlet temperatures) of the transcritical CO2 heat pump for simultaneous water cooling and heating the are studied and revised. Study shows that both the water mass flow rate and inlet temperature have significant effect on the system performances. Test results show that the effect of evaporator water mass flow rate on the system performances and water outlet temperatures is more pronounced (COP increases by 0.6 for 1 kg/min) compared to that of gas cooler water mass flow rate (COP increases by 0.4 for 1 kg/min) and the effect of gas cooler water inlet temperature is more significant (COP decreases by 0.48 for given range) compared to that of evaporator water inlet temperature (COP increases by 0.43 for given range). Comparisons of experimental values with simulated results show the maximum deviation of 5% for cooling capacity, 10% for heating capacity and 16% for system COP.
Źródło:: Archives of Thermodynamics; 2012, 33, 4; 23-40
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Effect of the type of heat sources on carbon dioxide emissions
Autorzy:: Rabczak, S.
Proszak-Miąsik, D.
Powiązania:: https://bibliotekanauki.pl/articles/124035.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: CO2 emission
heat pump
heat source
greenhouse gases
Opis:: A lot of attention is nowadays devoted to the problem of generally defined ecology. It is absolutely essential in case of systems and sources generating heat due to their direct influence on the environment through emitting post-process products to the atmosphere which are, most frequently a result of combustion. Therefore, constant searchers are made to optimize the operation of heat sources and to acquire energy from sources for which the general balance of carbon dioxide emission is zero or close to zero. This work compares the emissions of equivalent CO₂ from selected systems with the following heat sources: coal, gas furnace, heat pump, and refers results of the analysis to aspects connected with regulations concerning environmental protection. The systems generating thermal energy in the gas furnaces, coal, biomass, as well as the compression heat pumps with the lower heat source as ambient air or ground were taken under consideration, as well as centralized systems for the production of heat based on the combustion of coal, gas, oil, and biomass. the Emission of carbon dioxide for the installation of cogeneration and absorption heat pump were also calculated. Similarly obtained amount of extra emission necessary for the proper operation maintenance of heating devices via the supplied electricity from external source, the mostly fuel-fired power plants for fuels as previously mentioned. The results of the calculations were presented in tables and graphs.
Źródło:: Journal of Ecological Engineering; 2016, 17, 5; 186-191
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Study of the heat pump for a passenger electric vehicle based on refrigerant R744
Autorzy:: Canteros, Maria Laura
Polansky, Jiri
Powiązania:: https://bibliotekanauki.pl/articles/2091374.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: R744 (CO2)
heat pump
battery electric vehicle
thermal comfort
Opis:: Energy management plays a crucial role in cabin comfort as well as enormously affects the driving range. In this paper energy balances contemplating the implementation of a heat pump and an expansion device in battery electric vehicles are elaborated, by comparing the performances of refrigerants R1234yf and R744, from –20◦C to 20◦C. This work calculates the coefficient of performance, energy requirements for ventilation (from 1 to 5 people in the cabin) and energy required with the implementation of a heat pump, with the employment of a code in Python with the aid of CoolProp library. The work ratio is also estimated if the work recovery device recuperates the work during the expansion. Comments on the feasibility of the implementation are as well explicated. The results of the analysis show that the implementation of an expansion device in an heat pump may cover the energy requirement of the compressor from 27% to more than 35% at 20◦C in cycles operating with R744, and from 15% to more than 20% with refrigerant R1234yf, considering different compressor efficiencies. At –20◦C, it would be possible to recuperate between around 30 and 24%. However, the risk of suction when operating with R1234yf at ambient temperatures below –10◦C shows that the heat pump can only operate with R744. Thus, it is the only refrigerant that achieves the reduction of energy consumption at these temperatures.
Źródło:: Archives of Thermodynamics; 2022, 43, 2; 17--36
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Analysis of the conversion of primary energy into heat focused on a heat pump with a working substance (refrigerant) CO2
Analiza konwersji energii pierwotnej w ciepło przy zastosowaniu pompy ciepła z CO2 jako czynnikiem roboczym (chłodniczym)
Autorzy:: Hrnková, Bronislava
Hečko, Dávid
Kapjor, Andrej
Mičko, Pavol
Vantúch, Martin
Powiązania:: https://bibliotekanauki.pl/articles/2055092.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:: primary energy
heat pump
CO2
refrigerant
energy efficiency
energy demand
energia pierwotna
pompa ciepła
czynnik chłodniczy
efektywność energetyczna
zapotrzebowanie na energię
Opis:: The need for research in the field of energy efficiency and the ecological aspects of primary energy use is currently receiving considerable attention in the framework of European Union policy as well as in the Slovak Republic. It is necessary to deal with this issue not only for the needs of normal operations, but especially in the current situation, when due to the threat of the COVID-19 virus, the requirements for thermal energy are increased. A suitable way to achieve this is the use of renewable resources, in Slovakia mainly biomass, solar, wind, water and geothermal energy. Ambient air, ground heat, heat contained in groundwater and various other waste heat from technological processes represent a huge potential for the use of low-potential energy. The article is focused on solving the problem of conversion of primary energy into heat using thermodynamic cycles and compressor circulation with working substance (refrigerant) CO2.
Potrzeba badań w obszarze efektywności energetycznej i ekologicznych aspektów wykorzystania energii pierwotnej skupia obecnie dużo uwagi w ramach polityki Unii Europejskiej, jak również w Republice Słowackiej. Konieczne jest zajęcie się tym problemem nie tylko dla zapewnienia normalnego funkcjonowania, ale szczególnie w obecnej sytuacji, gdy w związku z zagrożeniem wirusem COVID-19 wzrastają wymagania i zapotrzebowanie na energię cieplną. Odpowiednim sposobem na osiągnięcie tego jest wykorzystanie zasobów odnawialnych, na Słowacji głównie biomasy, energii słonecznej, wiatrowej, wodnej i geotermalnej. Powietrze atmosferyczne, ciepło ziemi, ciepło zawarte w wodach gruntowych i różne inne rodzaje ciepła odpadowego z procesów technologicznych stanowią ogromny potencjał wykorzystania energii niskotemperaturowej. W artykule skupiono się na rozwiązaniu problemu konwersji energii pierwotnej na ciepło za pomocą obiegów termodynamicznych sprężarkowych z czynnikiem roboczym (chłodniczym) CO2.
Źródło:: Structure and Environment; 2021, 13, 2; 59--64
2081-1500
Pojawia się w:: Structure and Environment
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "CO2 heat pump" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język