Results 21 to 30 of about 110,150 (273)

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

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

Analysis of the Applicability of the Parabolic Trough Solar Thermal Power Plants in the Locations with a Temperate Climate

open access: yesEnergies, 2021
Currently, intensive work is underway in Poland to increase the share of renewable energy sources in the overall energy balance. Therefore, this paper presents the possibilities of using concentrated solar power in zones with a temperate climate.
Tomasz Janusz Teleszewski   +3 more
doaj   +1 more source

Evolutionary Synthesis of HVAC System Configurations: Algorithm Development. [PDF]

open access: yes, 2008
This paper describes the development of an optimization procedure for the synthesis of novel heating, ventilating, and air-conditioning (HVAC) system configurations. Novel HVAC system designs can be synthesized using model-based optimization methods. The
Angelov, Plamen   +4 more
core   +3 more sources

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

Study on the Coupling Effect of Heat Transfer and Refrigerant Distribution in the Flat Tube of a Microchannel Evaporator

open access: yesEnergies, 2022
Refrigerant maldistribution severely deteriorates the heat transfer performance of a microchannel evaporator. Compared with the refrigerant distribution among flat tubes along the header, refrigerant distribution among microchannels in the flat tube in ...
Wenju Hu, Xin Zhang
doaj   +1 more source

Wireless sensors and IoT platform for intelligent HVAC control [PDF]

open access: yes, 2018
Energy consumption of buildings (residential and non-residential) represents approximately 40% of total world electricity consumption, with half of this energy consumed by HVAC systems.
Duarte, Hélder   +3 more
core   +2 more sources

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

Design and implementation of cloud enabled random neural network-based decentralized smart controller with intelligent sensor nodes for HVAC [PDF]

open access: yes, 2016
Building energy management systems (BEMSs) monitor and control the heating ventilation and air conditioning (HVAC) of buildings in addition to many other building systems and utilities.
Ahmadinia, Ali   +5 more
core   +3 more sources

Predictive smart thermostat controller for heating, ventilation, and air-conditioning systems; pp. 291–299 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2018
The paper suggests a simple energy saving controller for heating, ventilation, and air-conditioning (HVAC) systems that combines information on occupancy and weather with predictive control to save energy in buildings.
Mallikarjun Soudari   +4 more
doaj   +1 more source

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