Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Asim, Nilofar; Badiei, Marzieh; Mohammad, Masita; Razali, Halim; Rajabi, Armin; Haw, Lim Chin; Ghazali, Mariyam Jameelah

doi:10.3390/ijerph19021016

Cited by 52 publications

(34 citation statements)

References 111 publications

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“…Haijing, L. et al [19] simulated seven cities in four thermal climate zones, and the results showed that the influence of shading differed significantly under different scenarios, with the variation range of cooling load proportion being about 45% and that of heat load proportion being about 21%. Asim, N. et al [20] proposed measures to improve the efficiency of HVAC system by analyzing related factors affecting the selection of HVAV system in the early design stage, so as to reduce the operation energy consumption. 4) Comparative studies that focus on the applicability of energy consumption simulation software in the design stage.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Climate Adaptability Analysis on the Shape of Outpatient Buildings for Different Climate Zones in China Based on Low-Energy Target

Wei¹,

Wang

Dang³

et al. 2022

Atmosphere

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Under the impact of COVID-19 and the needs for urban expansion, a large number of outpatient buildings have been rapidly constructed, but the problem of high energy consumption has always been ignored. There is a lack of research on the adaptability of building shape in different climate zones. Many studies have shown that a reasonable shape in the early stage of design can significantly reduce the energy consumption of buildings. Therefore, it helps if architects quickly select a reasonable shape that can effectively reduce energy consumption. This study summarized a number of outpatient building cases in China and proposed three typical building shapes: centralized-type (Shape-1), corridor-type (Shape-2), and courtyard-type (Shape-3). The Design Builder tool was used to simulate and analyze the typical building energy consumption in different climate zones. The simulation results show that Shape-2 (angle: 0°) should be chosen in severe cold zone; Shape-1 (angle: 90°) should be chosen in cold zone; Shape-1 (angle: 0°) should be chosen in hot summer and cold winter zone; Shape-1 (angle: 60°) should be chosen in hot summer and warm winter zone; and Shape-1 or Shape-2 can be chosen in warm zone. The results of this study can provide suggestions for the energy saving design of outpatient buildings in China and other areas with similar conditions. The result can help architects make rapid shape selection in the early stage of design.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Climate Adaptability Analysis on the Shape of Outpatient Buildings for Different Climate Zones in China Based on Low-Energy Target

Wei¹,

Wang

Dang³

et al. 2022

Atmosphere

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“…Second, the research should be expanded in diverse types of residential buildings with different comfort categories in multiple climate zones [32][33][34][35] to evaluate the operation of mixed-mode ventilation effectively in different climate regions and other aspects of energy/cost savings better. In addition, further study should practice research results using dynamic energy simulations in different cases, as well as analyze the relationship between the operation of mixed-mode ventilation and filtration in an HVAC system affected by the indoor/outdoor environment [36][37][38][39][40][41][42].…”

Section: Discussionmentioning

confidence: 99%

Mixed-Mode Ventilation in HVAC System for Energy and Economic Benefits in Residential Buildings

Cetin

2022

Energies

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In the U.S., approximately 47% of the total electricity use comes from residential buildings. Most of the residential buildings use HVAC system to ventilate, cool, or heat the indoor environmental spaces mechanically, rather than using natural outdoor air in transition seasons, even though the outdoor environmental conditions are favorable for indoor thermal comfort. In this case, an HVAC system using mixed-mode ventilation with an appropriate ratio of using indoor air and outdoor air could decrease the energy use in residential buildings. This research uses high-granular HVAC electricity use data with indoor thermostat data and outdoor weather data from residential buildings in Austin, Texas, to evaluate the benefits of energy and economics when using HVAC mixed-mode ventilation in spring and fall transition seasons. The results demonstrate that the household owners could save approximately 150.79 kWh of total HVAC energy use and 24.41% of HVAC cost in spring transition months (April/May), and similarly, 143.86 kWh of energy use and 27.2% cost savings in fall transition months (October/November). The results could support further study to use automatically operated windows for natural ventilation to reduce energy use in residential buildings toward sustainable development.

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“…6 The transfer of heat is also important in the construction industry and heating, ventilation, and heating, ventilation, and air conditioning (HVAC) systems. 7 The goal of HVAC is thermal comfort, and HVAC systems use heat transfer to attain this goal. Insulation, window design, and other energysaving building techniques are all impacted by heat transfer principles.…”

Section: Introductionmentioning

confidence: 99%

Enhancing heat transfer in MHD Falkner's‐Skan flow with thermal radiation, free convection and dusty fluid between parallel plates

Khan,

Ali,

Ghazwani

2024

Heat Trans

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Falkner's‐Skan flows are one‐dimensional flows widely used in fluid dynamics and boundary layer theory. They optimize heat exchangers and cooling systems, enhance turbine and compressor blades in turbomachinery, and provide consistency and quality in semiconductor fabrication. Additionally, they assist in pollution management and environmental impact assessments. The variety of Falkner's‐Skan flows clarifies fluid flow phenomena and their practical applications. This article aims to explore the impact of surface temperature on the flow behavior of dusty fluid in Falkner's‐Skan flow. The study focuses on the flow of dust particles in a channel formed by two infinite parallel plates. The study assumes that the particles are round and uniformly dispersed in the fluid. Furthermore, the article takes into account the effect of radiation on the energy equation. With the findings of this study, we hope to gain a better understanding of the dynamics of Falkner's‐Skan flow and contribute to the development of effective strategies for managing the flow of dusty fluids. The right plate's movement at free stream velocity causes the fluid to flow. Partial differential equations are used to represent the behavior of the flow. The Poincare‐Light Hill Technique yields exact answers. Visual representations of the temperature and velocity curves show the effects of different factors. It is possible to create graphic pictures of the fluid and dust particles using Mathcad‐15. Furthermore, critical fluid characteristics for engineers, such as skin friction and heat transfer rate, are analyzed and tabulated. These evaluations include the heat transfer rate at the wedge surface and the influence of this enhancement on surface viscous drag forces.

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Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Cited by 52 publications

References 111 publications

RETRACTED: Climate Adaptability Analysis on the Shape of Outpatient Buildings for Different Climate Zones in China Based on Low-Energy Target

RETRACTED: Climate Adaptability Analysis on the Shape of Outpatient Buildings for Different Climate Zones in China Based on Low-Energy Target

Mixed-Mode Ventilation in HVAC System for Energy and Economic Benefits in Residential Buildings

Enhancing heat transfer in MHD Falkner's‐Skan flow with thermal radiation, free convection and dusty fluid between parallel plates

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