Adsorption Heat Pump Using HFC Refrigerants

Riffat, Saffa; Williams, Michelle D.; Corr, Stuart J.

doi:10.1002/(sici)1099-114x(199705)21:6<481::aid-er277>3.0.co;2-7

Cited by 19 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is concluded that the adsorption isotherms should be related to adsorbate properties such as the size and the polarity of the molecules. Other more ozone-friendly working fluids for refrigeration, such as 1,1,1,2-tetrafluoroethane (R134a), R410a, R290, and R507a, were also investigated on activated carbon. − These isotherm data, together with the sorption isosteric enthalpy of the specific adsorbate–adsorbent system, are related to the adsorption characteristics of the utilized refrigerant. Some newly developed refrigerants, such as R1234yf and R1234ze, are proven to have less ozone depletion potential (ODP) and greenhouse potential (GHP).…”

Section: Introductionmentioning

confidence: 99%

Unary Adsorption Isotherms of 2,3,3,3-Tetrafluoropropene on Activated Carbon

Hou

Zhao

2022

J. Chem. Eng. Data

View full text Add to dashboard Cite

Adsorption isotherms of 2,3,3,3-tetrafluoropropene (R1234yf) on two kinds of activated carbon (PA-01 and NS-01) have been measured using the volumetric method. The adsorption equilibrium temperature is in the range of 273−353 K with an interval of 20 K. The pressure range is up to about 0.5 MPa. Specific surface areas of activated carbon PA-01 and NS-01 are 967.5 m 2 •g −1 and 928.3 m 2 •g −1 , respectively. The Langmuir−Freundlich equation and the Dubinin−Astakhov equation have been adopted to correlate the experimental data. Both models could describe the adsorption equilibria satisfactorily in the study range. The saturation amounts of adsorption on activated carbons PA-01 and NS-01 at 293 K are 5.1526 mmol/g and 4.9057 mmol/g, respectively. The isosteric enthalpy has been also analyzed. It demonstrates that the adsorption of R1234yf should be mainly based on physical interaction.

show abstract

Section: Introductionmentioning

confidence: 99%

Unary Adsorption Isotherms of 2,3,3,3-Tetrafluoropropene on Activated Carbon

Hou

Zhao

2022

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…In addition, using water as a refrigerant has two main limitations: (1) its low vapor pressure and (2) its high freezing point, which limits its application in refrigeration cycles operated below 0 °C. Adsorption heat pumps using hydrofluorocarbons (HFC)/activated carbon pairs have been reported . Moreover, adsorption cooling systems using HFC have recently shown to be very efficient …”

Section: Introductionmentioning

confidence: 99%

“…Adsorption heat pumps using hydrofluorocarbons (HFC)/activated carbon pairs have been reported. 12 Moreover, adsorption cooling systems using HFC have recently shown to be very efficient. 13 A critical step in developing efficient CTES and TES units is the choice of the adsorbent-refrigerant pair.…”

Section: ■ Introductionmentioning

confidence: 99%

Systematic Search of Suitable Metal–Organic Frameworks for Thermal Energy-Storage Applications with Low Global Warming Potential Refrigerants

García

Bahamón

Vega

2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Refrigeration processes based on physical adsorption are promising candidates for replacing high energy-intensive vapor compression cycles. Such adsorption-based refrigeration cycles facilitate the application of renewable energies and allow energy storage, that is, both cold thermal energy storage (CTES) and TES. In CTES and TES applications, the choice of a suitable adsorbent-refrigerant working pair plays a crucial role. In this work, we have conducted the first computational screening of experimentally available metal−organic frameworks (MOFs) for CTES and TES units using three low-global warming potential (GWP), fourth-generation refrigerants: hydrofluoroolefin (HFO) R1234yf, R1234ze(E), and the blend R513A, in order to search for the best MOF-refrigerant pair for this application. For comparison, the third-generation refrigerant R134a currently in use is also considered. The choice of these refrigerants is based on the need to deploy low-GWP refrigerants after the ratification of Kigali's agreement, suitable for different cooling applications. A total of 40 MOFs, belonging to several representative structural families were studied, including IRMOF, M-MOF-74, ZIF, COF, NU, and MIL topologies. We conducted Grand Canonical Monte Carlo simulations to establish a relationship between the adsorptive capacity and material properties. Results show that MOFs with open metal sites have a strong interaction with R1234yf and R1234ze(E), making them more suitable for TES. Conversely, MOFs presenting large pore sizes, such as Cr-MIL-101 and IRMOF-10, MOF-200, have a low affinity for HFO and large working capacities, showing a considerably higher CTES energy density than the currently used activated carbons/R134a pairs. It is also observed that the M-MOF-74 family is not suitable for CTES under the given operating conditions, but some of them may be appropriate for TES applications. Therefore, this study guides the selection of MOFs suitable for thermal-storage applications with this new class of low-GWP refrigerants, helping in meeting cooling global demand combined with intermittent sources of energy in a step toward achieving the sustainable energy scenario.

show abstract

Adsorption Working Pairs

Wang

2014

Adsorption Refrigeration Technology

View full text Add to dashboard Cite

Adsorption Heat Pump Using HFC Refrigerants

Cited by 19 publications

References 1 publication

Unary Adsorption Isotherms of 2,3,3,3-Tetrafluoropropene on Activated Carbon

Unary Adsorption Isotherms of 2,3,3,3-Tetrafluoropropene on Activated Carbon

Systematic Search of Suitable Metal–Organic Frameworks for Thermal Energy-Storage Applications with Low Global Warming Potential Refrigerants

Adsorption Working Pairs

Contact Info

Product

Resources

About