Searched for: author%253A%2522Gudjonsdottir%252C%2520V.%2522
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Gudjonsdottir, V. (author)
One of the most important steps we can take to minimize global warming is to become more energy efficient. An important example with potential for improvement is the large amount of energy wasted through waste heat streams in industry. For a long time there has already existed a solution that can efficiently upgrade waste heat streams to useful...
doctoral thesis 2020
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Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author)
Heat pumps can efficiently upgrade waste heat from the industry and in that way reduce emissions. One of the main reasons why heat pumps are not applied to a greater extent in industry are large payback periods. Compression–resorption heat pumps (CRHP) enhanced by wet compression are considered a very promising option that can have higher...
journal article 2020
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Shi, Liang (author), Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author)
Heat pumps can drastically reduce energy requirements in industry. Operating a compression resorption heat pump with an NH<sub>3</sub>-CO<sub>2</sub>-H<sub>2</sub>O mixture has been identified as a promising option that can have an increased performance compared to only NH<sub>3</sub>-H<sub>2</sub>O. In this paper an important process of the...
journal article 2020
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Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author), Goethals, A. (author)
Compression-resorption heat pumps (CRHP) utilizing wet compression are a very promising option to upgrade waste heat from industry. CRHPs have the potential to have higher coefficient of performance (COP) than the traditionally used vapour-compression heat pumps (VCHP). However, commercial solutions utilizing wet compression are not available...
journal article 2019
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Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author), Rexwinkel, G. (author), Kiss, AA (author)
Upgrading waste heat by compression resorption heat pumps (CRHP) has the potential to make a strong impact in industry. The efficiency of CRHP can be further improved by using alternative working fluids. In this work, the addition of carbon dioxide to aqueous ammonia solutions for application in CRHP is investigated. The previously published...
journal article 2017
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Shi, Liang (author), Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author), Rexwinkel, Glenn (author), Kiss, Anton A. (author)
Compression resorption heat pumps (CRHP) are a promising option to upgrade waste heat from industry. Alternative working fluids can further improve the efficiency of CRHP. The ternary mixture NH3-CO2-H2O has been identified as a promising working fluid for CRHP and has the potential to further enhance the coefficient of performance (COP) of the...
conference paper 2017
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Gudjonsdottir, V. (author), Infante Ferreira, C.A. (author)
Couple of models have been developed to calculate thermodynamic properties of NH3-CO2-H2O systems. These models are typically an equation of state for the vapor phase and an activity coefficient model for the liquid phase (Que &amp; Chen, 2011). The activity coefficient models can be divided into three groups based on previous studies, Pitzer...
conference paper 2016
Searched for: author%253A%2522Gudjonsdottir%252C%2520V.%2522
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