Results 21 to 30 of about 7,800 (206)

Optimization of Geometric Parameters of Thermal Insulation of Pre-Insulated Double Pipes

open access: yesEnergies, 2019
This paper presents the analysis of the heat conduction of pre-insulated double ducts and the optimization of the shape of thermal insulation by applying an elliptical shape.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Review of energy saving technologies research in HVAC systems [PDF]

open access: yesE3S Web of Conferences, 2023
Energy consumption in the building industry occupies a significant portion of the world’s total energy consumption, and heating, ventilation and air conditioning (HVAC) systems are one of the largest energy consumers in buildings.
Pan Yonghao
doaj   +1 more source

Effects of Some Geometric Parameters in Energy-Efficient Heat Distribution of Pre-Insulated Double Pipes

open access: yesProceedings, 2018
In the case of a computational example, a few aspects of the twin pipe geometry are presented, which have an effect on heat losses through double heating ducts.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Reduction of Heat Losses in a Pre-Insulated Network Located in Central Poland by Lowering the Operating Temperature of the Water and the Use of Egg-shaped Thermal Insulation: A Case Study

open access: yesEnergies, 2019
This paper presents possible variants of reducing the heat loss in an existing heating network made from single pre-insulated pipes located in central Europe.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Thermal Comfort in an Office Room Using Square Diffuser

open access: yesEuropean Mechanical Science, 2021
The office is an important part of our daily life, people spend most of their time doing works inside of the office and therefore the quality of the indoor environment is a significant factor affecting the productivity and happiness of office users. Many
Alper Yıldırım, Coskun Özalp
doaj   +1 more source

A New Method to Determine the Annual Energy Output of Liquid-Based Solar Collectors

open access: yesProceedings, 2019
This article presents a new way of determining the annual energy output of solar thermal collectors. The proposed method, in the first stage, assumes the creation of a database that contains energy gains QSC from the solar collectors, the average annual ...
Miroslaw Zukowski, Paulina Radzajewska
doaj   +1 more source

Air Quality Assessment of Some Selected Hospitals within Baghdad City [PDF]

open access: yesEngineering and Technology Journal, 2019
Hospitals are institutions designed to provide medical assistance to sick people have harm to their bodies, making them more likely to die than others, so indoor air quality (IAQ) of the various facilities of the hospital must be taken into account by ...
Azhar Haleem   +2 more
doaj   +1 more source

The effect of the air duct tightness on the stability of the indoor air parameters

open access: yesИнженерно-строительный журнал, 2020
The present study aimed to determine the impact of a gradual and lineal increase of the air duct leakage factor on various indoor air stability parameters in ventilation systems across the following scenarios: 1) air leakage effect on the air pressure ...
Aleksejs Prozuments   +3 more
doaj   +1 more source

Black-Box Optimization for Buildings and Its Enhancement by Advanced Communication Infrastructure

open access: yesAdvances in Distributed Computing and Artificial Intelligence Journal, 2013
The solution of repeated fixed-horizon trajectory optimization problems of processes that are either too difficult or too complex to be described by physics-based models can pose formidable challenges. Very often, soft-computing methods   e.g.
Karel MACEK   +3 more
doaj   +1 more source

Structural Design and Photoelectric Performance of Vertical Sunlight-Tracking Mid-Pane Photovoltaic Louver Window

open access: yesEnergies
To address the bottleneck that traditional building blinds struggle with, namely synergistically achieve shading control and energy recovery, a vertical mid-pane photovoltaic (PV) louver based on a self-powered feedback mechanism was designed.
Hongwei Gong   +3 more
doaj   +1 more source

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