scholarly journals Energy Efficiency Through Lighting and Cooling System Approach

2018 ◽  
Vol 26 (1) ◽  
Author(s):  
Faaris Mujaahid ◽  
Doane Puri Mustika ◽  
Ramadoni Syahputra ◽  
Karisma Trinanda Putra ◽  
Kunnu Purwanto
2020 ◽  
Author(s):  
A. P. Tsoy ◽  
A. V. Baranenko ◽  
A. S. Granovsky ◽  
D. A. Tsoy ◽  
R. A. Dzhamasheva

2018 ◽  
Vol 17 (3) ◽  
pp. 501-529 ◽  
Author(s):  
Patrick T. Sekoai ◽  
Kelvin O. Yoro ◽  
Michael O. Bodunrin ◽  
Augustine O. Ayeni ◽  
Michael O. Daramola

Author(s):  
Arsine Baghdasarian ◽  
Omar Ramos ◽  
Jesse Ruvalcaba ◽  
Sergio Talome ◽  
Frank Wang ◽  
...  

This paper reports on the development of a conceptual design, construction and instrumentation of an experimental facility that can be used to carry out experimental research towards increasing energy efficiency in buildings. The overarching idea is to construct a system that emulates the scaled dimensions and materials of a typical building structure. The sub-scale testbed consists of a two-floor building configuration with dimensions of 1.2 m × 0.92 m × 1.1 m. The building structure is made out of wood, and covered with drywall and fiberglass insulation. Fixed walls are selected for the first floor whereas movable walls are incorporated into the second floor to study the effects of different room configurations. Four staircase openings enable airflow between the two floors. The second floor has a tiled-style ceiling and removable walls that allow for connectivity of sensors and actuators. A set of heating and cooling sub-systems, consisting of light bulbs and thermoelectric coolers connected to fans, are used for each room in the building. Both the set of light bulbs as well as the cooling system are powered through a relay box, and connected to a computer via LabVIEW which also interfaces the different sensing and actuating devices. The capabilities of the experimental facility are tested by implementing time-dependent heating- and cooling-processes and an on-off control strategy on a two-room prototype. Preliminary results demonstrate that the experimental testbed offers a reliable and versatile experimental system for research purposes.


2020 ◽  
Author(s):  
Paolo Re ◽  
Francesco Lamboglia ◽  
Giorgio Missiaggia

2012 ◽  
Vol 16 (suppl. 2) ◽  
pp. 375-385 ◽  
Author(s):  
Mirjana Lakovic ◽  
Slobodan Lakovic ◽  
Milos Banjac

The paper presents a theoretical analysis of the cooling system of a 110 MW coal-fired power plant located in central Serbia, where eight evaporative towers cool down the plant. An updated research on the evaporative tower cooling system has been carried out to show the theoretical analysis of the tower heat and mass balance, taking into account the sensible and latent heat exchanged during the processes which occur inside these towers. Power plants which are using wet cooling towers for cooling condenser cooling water have higher design temperature of cooling water, thus the designed condensing pressure is higher compared to plants with a once-through cooling system. Daily and seasonal changes further deteriorate energy efficiency of these plants, so it can be concluded that these plants have up to 5% less efficiency compared to systems with once-through cooling. The whole analysis permitted to evaluate the optimal conditions, as far as the operation of the towers is concerned, and to suggest an improvement of the plant. Since plant energy efficiency improvement has become a quite common issue today, the evaluation of the cooling system operation was conducted under the hypothesis of an increase in the plant overall energy efficiency due to low cost improvement in cooling tower system.


2013 ◽  
Vol 281 ◽  
pp. 649-652 ◽  
Author(s):  
Dae Kyo Jung ◽  
Dong Hwan Lee ◽  
Joo Ho Shin ◽  
Byung Hun Song ◽  
Seung Hee Park

Recently, the interest in increasing energy efficiency of building energy management system (BEMS) has become a high-priority and thus the related studies also increased. In particular, since the energy consumption in terms of heating and cooling system takes a large portion of the energy consumed in buildings, it is strongly required to enhance the energy efficiency through intelligent operation and/or management of HVAC (Heating, Ventilation and Air Conditioning) system. To tackle this issue, this study deals with the BIM (Building Information Modeling)-based energy performance analysis implemented in Energyplus. The BIM model constructed at Revit is updated at Design Builder, adding HVAC models and converted compatibly with the Energyplus environment. And then, the HVAC models are modified throughout the comparison between the energy consumption patterns and the real-time monitoring in-field data. In order to maximize the building energy performance, a genetic algorithm (GA)-based optimization technique is applied to the modified HVAC models. Throughout the proposed building energy simulation, finally, the best optimized HVAC control schedule for the target building can be obtained in the form of “supply air temperature schedule”.


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