<abstract xmlns="http://www.w3.org/1999/xhtml">

COVID-19 is constantly spreading around the world. Doctors, nurses and medical staff spend more time providing their professional help than usual. It is especially important to provide them with a suitable working environment. Therefore, in the following article we will deal with the design of a computational model of a laminar field in a clean room using CFD methods.
</abstract>

Laminar Field Optimization in Connection with the Current Pandemic Situation Caused by Covid-19

<abstract xmlns="http://www.w3.org/1999/xhtml">

In the paper the measurements of thermal comfort in the modern smart building “Energis” have been presented together with their analysis. The data have been obtained in the spring and the analyses of indoor air parameters as well as subjective responses of the volunteers have been conducted. Based on the performed studies it has been concluded that the people felt fine in the considered room (pleasantly warm, cool and comfortable) and described their feelings as acceptable and comfortable.
</abstract>

Thermal Comfort Measurements in the Energis Building

<abstract xmlns="http://www.w3.org/1999/xhtml">

This study focuses on designing an efficient energy utilization protocol for the University of Lagos Senate office building, to ensure the reduction of energy consumption, reduce the cost of power and also ensure energy efficiency. Pre-retrofitting, the energy consumption cost for the UNILAG senate office building was calculated to be ₦20, 236, 962 i.e. 776.78 EUI (kWh/m2/y) using the appliance approach. The impact of various retrofitting methods was also simulated and measured utilizing BIM tools such as Autodesk Maya, Autodesk Revit and Autodesk Insight. This resulted in an estimated reduction in energy consumption cost to between ₦19,304,038.05 and 18,549,199.3 post retrofitting, this translates to about 712 EUI (kWh/m2/y). Results show that a 4.61-8.34% reduction in energy usage for the senate house can be achieved using the methods proposed in this research.
</abstract>

Retrofitting Existing Office Building for Efficient Energy Management and Performance

<abstract xmlns="http://www.w3.org/1999/xhtml">

Clean rooms, including operating rooms, are energy-intensive. During their operation, the concentration of particles in the air, air temperature and humidity are strictly monitored. HVAC systems in the operating room are subject to high demands on maintaining a stable heat and humidity microclimate, as well as particle concentrations within the permitted range. To cover heat losses and heat loads of the building, it is necessary to dimension ventilation equipment with high outputs and high energy consumption. By suitable optimization of the dispositional location of the operating tract in the building and the use of suitable thicknesses of insulating material, it is possible to reduce the performance requirements for the HVAC system, which significantly reduces energy consumption. Heat loss and heat load of the operating tract were evaluated using TechCon software. The performance values of the heaters and coolers for the HVAC units were calculated in the VentiCad design software. The optimization indicates a significant reduction in heat loss and heat load, as well as a reduction in the required temperature of the air supplied to the room by more than 10°C.
</abstract>

Faculty of Mechanical Engineering, Department of Power Engineering

Energy Efficiency Optimization of the Operating Room Due to the Dispositional Location

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Structure and Environment

ABOUT THE JOURNAL   Structure and Environment, a quarterly journal, has been published by the Kielce University of Technology since 2009.  It uses Editorial Manager for online submission and manuscript tracking https://www.editorialmanager.com/sae/default1.aspx. It is recommended to provide ORCID codes for each co-author. Papers are published in English and are assigned digital object identifier DOI:10.30540/sae.  Structure and Environment is an Open Access journal that allows unrestricted and free-of-charge access to its content at www.sae.tu.kielce.pl and www.sciendo.com./journal/SAE.  Peer-review process:   The editor appoints two reviewers whose names are hidden from the authors.  Manuscript evaluations are assigned one of four outcomes:　Accept, Minor Revisions, Major Revisions, and Reject. Manuscripts with Minor Revision" do not require a second review. Manuscripts receiving a Major Revision evaluation must be subjected to a second review. If the author(s) failed to make satisfactory changes, the manuscript is rejected Rejected manuscripts are given no further consideration.  The editor decides whether the paper fulfill all requirements i.e. formal and scientific.  As soon as the publication appears in electronic forms on the Internet there is no possibility to change the content of the article.   The authors do not bear any publication costs.　   In 2023, Structure and Environment was entered into the Polish Ministry of Education and Science Journals list with a score of 70 points. Committed to ensuring the high quality of our publications.  The content of the quarterly is indexed by more 10 ten bibliographic databases and made available in the collection of peer-reviewed interdisciplinary scientific articles, e-Publikacje Nauki Polskiej.　  Format of the journal – electronic forme- ISSN: 2657 – 6902  ISSN: 2081 - 1500DOI: 10.30540/sae/  Journal Metrics:  Index Copernicus Value (IVC) 2022 = 100  The Polish Ministry of Education and Science 2021 = 70 pts   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 