Results 11 to 20 of about 3,003 (225)
Electrification of Heating-Requirements for Successful Wide-Scale Deployment. [PDF]
Wiley Interdiscip Rev Energy EnvironHeat pump test facilities at Ulster University for high‐temperature applications. ABSTRACT Electrification is potentially the most efficient method of decarbonization of space, water, and in certain instances, process heating through the deployment of electrically driven heat pumps. However, challenges are noted in terms of electricity network capacity
Hewitt NJ.
europepmc +2 more sources
Evaluation of R600a blended with various quantities of CuO, Al2O3 and SiO2 nanoparticles
Zaštita Materijala, 2022 In this work three different nanoparticle concentrations of CuO, Al2O3, and SiO2 are dispersed in R600a vapour compression refrigeration system. The experiment was carried out using nanolubricant concentrations of 0g/L, 0.2g/L, and 0.4g/L having CuO ...
Alagarsamy Senthilkumar +3 more
doaj +1 more source
Theoretical analysis of a Low GWP Refrigerants as a Drop in substitute of R134a in a Domestic Refrigerator [PDF]
Iranica Journal of Energy and Environment, 2018 Now a days Fridges and Air-conditioners are mostly used in domestic environment. The CFCs have been almost ruled out since 1995 due to their huge impact on the ozone layer, due to the above problem HFC refrigerants are introduced but these are having a ...
M. Shaik Sk, K. Srinivas
doaj +1 more source
Study on the Performance of New High Temperature Heat Pump Mixtures as Alternatives to R245fa
Taiyuan Ligong Daxue xuebao, 2023 Purposes At present, the contradiction between energy supply and demand is increasingly intensifying, and high-temperature heat pumps, as an energy-saving and emission-reduction technology, can upgrade a large amount of low-grade waste heat to high-grade
Biao FENG +4 more
doaj +1 more source
Energy Science &Engineering, Volume 11, Issue 7, Page 2330-2350, July 2023., 2023 The importance of the saturated vapor line in the temperature‐entropy field is examined. A working fluid and expander selection method is introduced to simplify the layout. Software is developed, and its working principle is discussed. The applicability of the new selection method is demonstrated.
Axel Groniewsky +2 more
wiley +1 more source
Theoretical investigation of the thermal performance of a novel solar loop-heat-pipe façade-based heat pump water heating system [PDF]
, 2014 The aim of the paper was to present a dedicated theoretical investigation into the thermal performance of a novel solar loop-heat-pipe façade based heat pump water heating system. This involved thermo-fluid analyses, computer numerical model development,
He, Wei +5 more
core +2 more sources
Energy Science &Engineering, Volume 11, Issue 4, Page 1451-1470, April 2023., 2023 The energy is generated by bifacial solar photovoltaics and solar thermal collectors and supplied to the shelter for cooling purposes and freshwater generation. Excess of daytime energy production is stored in a battery and thermal storage unit to keep the system operational at nighttime. For freshwater generation—an electrodialysis system is used, and
Fariha Niaz, Yusuf Bicer
wiley +1 more source
Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ, 2018 In this work, the effect of capillary tube diameter on refrigerator performance is studied for refrigerants R134a, R290, R600a and its mixture which named: RMix1(70%R134a,20%R290,10%R600a), RMix2(70%R134a,10%R290,20%R600a), RMix3.(50%R134a,20%R290,30 ...
Ali K. Al-Sayyab
doaj +1 more source
Energy Technology, Volume 11, Issue 2, February 2023., 2023 The interdependencies of the refrigerant, flowsheet, compressor, and operating point are evaluated for residential heat pumps. The study shows that the optimal refrigerant strongly depends on the flowsheet and the compressor modeling approach.
Christoph Höges +5 more
wiley +1 more source
Energy Science &Engineering, Volume 10, Issue 10, Page 3869-3892, October 2022., 2022 Effect of temperature glide for the mixed fluids on recuperator is negligibly 2. Specific volume ratios can be considered as performance indicators of recuperator 3. A universal empirical correlation equation of efficiency was proposed 4. A low predicted error could be obtained when the temperature glide is lower than 16 K 5.
Jui‐Ching Hsieh +2 more
wiley +1 more source