Abstract
Presents the results of studies of innovative materials in the field of renewable energy.The paper proposes a design and a formula for assessing energy efficiency of the heat pump air dryer, which uses zeotropic hydrocarbon mixtures of saturated hydrocarbons as a working agent and applies the principle of a counter-current heat exchanger with a variable temperature of both the working and the drying agents. Energy efficiency of the heat pump is achieved by means of obtaining a greater part of heat from renewable energy sources, in this case by cooling the air and condensing the water vapors in the heat pump. A conducted analysis identified correlations in establishing the marginal real coefficient of performance of the compression heat pump dryer running on zeotropic hydrocarbon mixtures and operating a cycle with variable temperatures of both the working and the drying agent in the evaporator and the condenser of the heat pump. According to the established correlations, the marginal real coefficient of performance of the compression heat pump dryers running on zeotropic hydrocarbon mixtures of 40 mol% of R600a and 60 mol% of R601 is 1.92 times higher than that of the same dryers running on only R600 (n-butane).
Highlights
IntroductionDrying agricultural and other types of produce, including grassy forage, vegetables, fruits, grains, timber, pottery and other materials, accounts for a significant energy consumption
Drying agricultural and other types of produce, including grassy forage, vegetables, fruits, grains, timber, pottery and other materials, accounts for a significant energy consumption.A literature review [1,2,3,4,5] demonstrates that grassy forage, grains, vegetables, fruits, different types of timber, and other materials are dried most properly and effectively with heat pumps at low temperatures using the air as the drying agent with its complete recirculation and dehydration
Energy efficiency of the heat pump is achieved by means of obtaining heat from a renewable energy source, in this case by cooling the air and condensation of water vapors in the heat pump
Summary
Drying agricultural and other types of produce, including grassy forage, vegetables, fruits, grains, timber, pottery and other materials, accounts for a significant energy consumption. A literature review [1,2,3,4,5] demonstrates that grassy forage, grains, vegetables, fruits, different types of timber, and other materials are dried most properly and effectively with heat pumps at low temperatures using the air as the drying agent with its complete recirculation and dehydration. At the same time, when a source or sink for heat has limited volumetric heat capacity, for example, the drying air [7], whose temperature changes significantly while it is being dehydrated in the evaporator and being heated in the condenser, using a substance with a constant boiling point as a working agent [8,9] is characterized by reduced efficiency of non-renewable energy (electricity from thermal power plants, gas, etc.) used to drive the compressor
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
