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Applied Sciences
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Renewable Energy Integrated Heat Pump Systems for Residential and Commercial...
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Renewable Energy Integrated Heat Pump Systems for Residential and Commercial Buildings

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 2269

Special Issue Editor

Prof. Szabolcs Varga

E-Mail Website
Guest Editor
1. Energy Group, Institute of Science and Innovation in Mechanical and Industrial Engineering, Porto, Portugal
2. Department of Mechanical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
Interests: renewable heating and cooling; heat pumps; ejector systems; renewable desalination; process heating and cooling; heat driven cycles; high temperature heat pumps

Special Issue Information

Dear Colleagues,

Climate change is a global issue that influences all aspects of human life, including the economy. Therefore, decarbonisation has become a global objective, in particular, in the energy and building sectors. The heating and cooling of buildings alone is responsible for 40% of the final energy consumption and about 36% of the greenhouse gas emissions in Europe. The ambitious goal of achieving carbon-neutrality by 2050 will not be possible without further developments in domestic hot water (DHW) and indoor heating and cooling technologies. Heat pumps (HPs) will play a fundamental role for achieving long-term sustainability in buildings. They are more efficient than conventional boilers, and when using an environmentally friendly refrigerant and a renewable energy source to drive them, long-term sustainability can be achieved.

The successful integration of renewable energy conversion technologies, heat pumps, and heat distribution systems goes beyond the efficient operation of the individual components. Compatible technologies, adequate low environmental impact working fluids, low-cost energy storage, high-performance heat pumps, and integrated control systems are needed. The Guest Editors are inviting submissions to a Special Issue of Applied Sciences on the subject area of renewable energy integrated heat pump systems. This Special Issue aims to collect and publish high-quality research results based on theoretical, experimental, and numerical approaches.

Topics of interest for publication include but are not limited to the following:

- Renewable energy driven heat pump design

- System integration

- Energy storage methods

- Efficient control strategies and intelligent control system development

- Component optimisation

- Economics, efficiency, and savings

- Case studies

Prof. Szabolcs Varga
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • heat pumps
  • renewable energy sources
  • system integration
  • control system development
  • simulation studies
  • experimental works
  • case studies
  • technoeconomical studies

Published Papers (1 paper)

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Research

26 pages, 9982 KiB  
Article
Numerical and One-Dimensional Studies of Supersonic Ejectors for Refrigeration Application: The Significance of Wall Pressure Variation in the Converging Mixing Section
by Eldwin Djajadiwinata, Shereef Sadek, Shaker Alaqel, Jamel Orfi and Hany Al-Ansary
Appl. Sci. 2021, 11(7), 3245; https://0-doi-org.brum.beds.ac.uk/10.3390/app11073245 - 05 Apr 2021
Cited by 1 | Viewed by 1796
Abstract
This paper studies the pressure variation that exists on the converging mixing section wall of a supersonic ejector for refrigeration application. The objective is to show that the ejector one-dimensional model can be improved by considering this wall’s pressure variation which is typically [...] Read more.
This paper studies the pressure variation that exists on the converging mixing section wall of a supersonic ejector for refrigeration application. The objective is to show that the ejector one-dimensional model can be improved by considering this wall’s pressure variation which is typically assumed constant. Computational Fluid Dynamics (CFD) simulations were used to obtain the pressure variation on the aforementioned wall. Four different ejectors were simulated. An ejector was obtained from a published experimental work and used to validate the CFD simulations. The other three ejectors were a modification of the first ejector and used for the parametric study. The secondary mass flow rate, m˙s, was the main parameter to compare. The CFD validation results indicate that the transition SST turbulence model is better than the k-omega SST model in predicting the m˙s. The results of the ejector one-dimensional model were compared before and after incorporating the wall pressure variation. The comparison shows that the effect of the pressure variation is significant at certain operating conditions. Even around 2% change in the average pressure can give around 32% difference in the prediction of m˙s. For the least sensitive case, around 2% change in the average pressure can give around 7% difference in the prediction. Full article
(This article belongs to the Special Issue Renewable Energy Integrated Heat Pump Systems for Residential and Commercial Buildings)
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