Search Results - subject:"HVAC SYSTEMS"

Energy modeling of pig houses : a South Korean feasibility study

Kwak, Younghoon; Shin, Hakjong; Kang, Minho; Mun, Sun-Hye; … - In: Energy strategy reviews 36 (2021), pp. 1-11

South Korea has potential in developing large-scale pig-farming practices. However, poorly designed facilities and ventilation structures lead to production losses and energy inefficiency. This study examines energy efficiency in pig houses by establishing a heating, ventilation, and...

Persistent link: https://www.econbiz.de/10012704660

A systematic review of building systems and technologies to mitigate the spread of airborne viruses

Salman, Amna; Sattineni, Anoop; Azhar, Salman; Leousis, … - In: Journal of Facilities Management 20 (2021) 3, pp. 369-384

Purpose The purpose of this study is to conduct a rigorous systematic literature review and present a summary of building systems and technologies that can be used to mitigate the spread of airborne viruses. With the recent outbreak of COVID-19, occupants’ health and indoor air quality (IAQ)...

Persistent link: https://www.econbiz.de/10014867504

Integrated estimation of commercial sector end-use load shapes and energy use intensities in the PG&E service area

Akbari, H.; Eto, J.; Konopacki, S.; Afzal, A.; … - 2009

This project represents a unique research effort to address the commercial sector end-use energy forecasting data needs of the Pacific Gas and Electric Company (PG&E) and the California Energy Commission (CEC). The object of the project was to develop an updated set of commercial sector end-use...

Persistent link: https://www.econbiz.de/10009436644

A coupled numerical approach on museum air conditioning: Energy and fluid-dynamic analysis

Ascione, Fabrizio; Bellia, Laura; Capozzoli, Alfonso - In: Applied Energy 103 (2013) C, pp. 416-427

In the museum environment, the temporal stability and the spatial uniformity of the indoor microclimatic parameters are necessary primarily for the correct artwork conservation and then for the occupant thermal comfort. Therefore, a HVAC system is usually necessary.

Persistent link: https://www.econbiz.de/10010602966

Application of entransy in the analysis of HVAC systems in buildings

Zhang, Lun; Liu, Xiaohua; Jiang, Yi - In: Energy 53 (2013) C, pp. 332-342

The main task of HVAC systems in the cooling condition is to remove heat from indoor environment to outdoor environment …. HVAC systems are complex networks of various processes, e.g., heat transfer, heat–work conversion, heat–humidity conversion … work) of HVAC systems. Entransy is a new parameter defined as heat transfer ability. Entransy dissipation refers to the …

Persistent link: https://www.econbiz.de/10011053637

Comparing Maintenance Costs of Geothermal Heat Pump Systems with other HVAC Systems in Lincoln Public Schools: Repair, Service, and Corrective Actions

Martin, M.A.; Durfee, D.J.; Hughes, P.J. - 2006

The Lincoln Public School District, in Lincoln, Nebraska, recently installed vertical-bore geothermal heat pump systems in four, new, elementary schools. Because the district has consistent maintenance records and procedures, it was possible to study repair, service and corrective maintenance...

Persistent link: https://www.econbiz.de/10009436207

Application of machine learning in the fault diagnostics of air handling units

Najafi, Massieh; Auslander, David M.; Bartlett, Peter L.; … - In: Applied Energy 96 (2012) C, pp. 347-358

An air handling unit’s energy usage can vary from the original design as components fail or fault – dampers leak or fail to open/close, valves get stuck, and so on. Such problems do not necessarily result in occupant complaints and, consequently, are not even recognized to have occurred. In...

Persistent link: https://www.econbiz.de/10010702521

A methodology for quantitative comparison of control solutions and its application to HVAC (heating, ventilation and air conditioning) systems

Macek, Karel; Mařík, Karel - In: Energy 44 (2012) 1, pp. 117-125

Many control solutions are currently available for controlling energy system operations. Newly developed solutions for established systems are assumed to demonstrate improvement over previous solutions especially in cost savings. We have found this to be true in the area of HVAC (heating,...

Persistent link: https://www.econbiz.de/10011052931

Energy and exergy performance of residential heating systems with separate mechanical ventilation

Zmeureanu, Radu; Yu Wu, Xin - In: Energy 32 (2007) 3, pp. 187-195

The paper brings new evidence on the impact of separate mechanical ventilation system on the annual energy and exergy performance of several design alternatives of residential heating systems, when they are designed for a house in Montreal. Mathematical models of residential heating, ventilation...

Persistent link: https://www.econbiz.de/10010808212

Technical issues in low to medium-temperature district heating

Kilkis, I.B. - In: International Journal of Global Energy Issues 17 (2002) 1/2, pp. 113-129

design example shows that district heating can be substantially improved by using cascaded, hybrid HVAC systems with …

Persistent link: https://www.econbiz.de/10010670005