scholarly journals Thermal Comfort and HVAC Systems Operation Challenges in a Modern Office Building – Case Study

2016 ◽  
Vol 11 (2) ◽  
pp. 103-114 ◽  
Author(s):  
Ema Nemethova ◽  
Werner Stutterecker ◽  
Thomas Schoberer
Keyword(s):  
Indoor Environment ◽  
Transition Period ◽  
Control Strategies ◽  
Office Building ◽  
Cooling Period ◽  
Critical Areas ◽  
System Improvement ◽  
Normative Criteria ◽  
Environment Parameters ◽  
Portable Sensor

Abstract The aim of the study is to evaluate the indoor environment conditions in the new-built office building, Energetikum, and consequently suggest the control strategies, which can lead to determination of critical areas and elimination of thermal discomfort. Representative offices have been selected and equipped with portable sensor groups for monitoring of the indoor environment parameters. Contribution is presenting the data obtained from 6 selected rooms during 3 reference weeks - heating, transition and cooling period. The measured results indicate overheating of the rooms, particularly in the ones with the large glazed areas with higher solar gains. The values of indoor air temperature during heating and transition period could not meet the normative criteria according to standard EN 15251:2007 (the cat. II.) during 13 % - 49 % of evaluated time intervals. Consequently, the simulation model of the selected office was created and is pointing to the possibilities of the control system improvement, which can lead to an elimination of the problem with overheating.

scholarly journals Thermal Comfort and Energy Consumption Using Different Radiant Heating/Cooling Systems in a Modern Office Building

2017 ◽  
Vol 25 (2) ◽  
pp. 33-38
Author(s):  
Ema Nemethova ◽  
Werner Stutterecker ◽  
Thomas Schoberer
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Transition Period ◽  
Office Building ◽  
Time Intervals ◽  
Cooling Systems ◽  
Near Surface ◽  
Representative Office ◽  
Normative Criteria ◽  
Portable Sensor

Abstract The aim of the study is to evaluate the potential of enhancing thermal comfort and energy consumption created by three different radiant systems in the newly-built Energetikum office building. A representative office, Simulation room 1/1, was selected from 6 areas equipped with portable sensor groups for the indoor environment monitoring. The presented data obtained from 3 reference weeks; the heating, transition and cooling periods indicate overheating, particularly during the heating and transition period. The values of the indoor air temperature during the heating and transition period could not meet the normative criteria according to standard EN 15251:2007 (cat. II.) for 15-30% of the time intervals evaluated. Consequently, a simulation model of the selected office was created and points to the possibilities of improving the control system, which can lead to an elimination of the problem with overheating. Three different radiant systems - floor heating/ cooling, a thermally active ceiling, and a near-surface thermally active ceiling were implemented in the model. A comparison of their effects on thermal comfort and energy consumption is presented in the paper.

Analysis of Electrical Energy Savings From Daylighting Through Skylights

Solar Energy ◽  
2005 ◽  
Author(s):  
Abdelkarim Nemri ◽  
Moncef Krarti
Keyword(s):  
Energy Use ◽  
Energy Savings ◽  
Simulation Analysis ◽  
Control Strategies ◽  
Electrical Energy ◽  
Office Building ◽  
Analysis Tool ◽  
Energy Saving Potential ◽  
Lighting Energy ◽  
The Impact

This paper provides a simplified analysis tool to assess the energy saving potential of daylighting for commercial buildings through skylights. Specifically, the impact of daylighting is investigated for various fenestration opening sizes, glazing types, control strategies, and geographic locations. A top floor of a prototypical office building has been considered in the analysis. The results obtained for the office building can be applied to other types of buildings such as retails stores, schools, and warehouses. Based on the simulation analysis results, it was determined that skylight to floor ratio more than 0.3 does not affect significantly the lighting energy savings. An optimum value of skylight to floor area ratio was found to be 0.2 to minimize the annual total building energy use.

Indoor Environment Influenced by Radiant Effect of Floor Heating

2016 ◽  
Vol 824 ◽  
pp. 218-225
Author(s):  
Mária Budiaková
Keyword(s):  
Indoor Environment ◽  
Office Building ◽  
Thermal Manikin ◽  
Experimental Measurements ◽  
Indoor Climate ◽  
Thermal Discomfort ◽  
Scientific Analysis ◽  
Radiant Floor Heating ◽  
Floor Heating

The paper is oriented on the indoor environment influenced by radiant effect of floor heating. Questionnaire survey has showed problems with providing quality of indoor climate in new office building in Bratislava. The cause of problems was formation of local thermal discomfort, in particular mainly radiant asymmetry. To clarify the radiant asymmetry, there were carried out experimental measurements with thermal manikin in a special microclimatic laboratory for the radiant floor heating. The scientific analysis and the outputs from measurements are presented in this paper. In the conclusion of this paper are introduced principals for designing the offices’ interiors without local thermal discomfort.

Developing a Healthy, Comfortable and Energy-Saving Office Building

2012 ◽  
Vol 193-194 ◽  
pp. 45-50 ◽  
Author(s):  
Wen Pei Sung ◽  
Yi Rou Chi ◽  
Lin Jun Hong ◽  
Yu Kuang Zhao
Keyword(s):  
Indoor Air ◽  
Air Conditioning ◽  
Indoor Environment ◽  
Room Temperature ◽  
Office Building ◽  
Tropical Region ◽  
High Humidity ◽  
Indoor Temperature ◽  
Office Environment ◽  
Research Show

How to maintain a comfortable indoor environment without excessively relying on mechanical HVAC (Heating, Ventilation, and Air Conditioning) is a target to be pursued for future living requirements. The results obtained in this research show that in an office environment, the room temperature monitored during winter is close to the comfortable temperature; however, the office occupants feel that a little warmer indoor temperature is comfort. During summer, the occupants prefer cooler temperature than the comfort temperature. Additionally, Taiwan is located in sub-tropical region with hot and humid summer. Even if the room temperature is maintained in a comfortable range, the occupants still feel not so comfortable because of high humidity. Hence, reducing the room temperature below 23 °C is inferred to make occupants feel comfortable. Questionnaire survey indicates that ventilation is preferred by 30.9% of the respondents for summer and 43.3% for winter as an effective method to improve the stuffy indoor air.

scholarly journals Intelligent Autonomous Vehicle for Indoor Mail Delivery Using Wireless Sensor Network

2019 ◽  
pp. 12-19
Keyword(s):  
Indoor Environment ◽  
Autonomous Vehicle ◽  
Office Building ◽  
Wireless Sensor ◽  
Generalized Regression Neural Network ◽  
Improve Quality ◽  
Office Work ◽  
Localization Accuracy ◽  
Delivery Problem

The number of office transactions continually increasing ,therefore, several techniques proposed to improve quality of service for the office work. Improvements including electronic archiving limited; they didn’t solve the problem of transferring parcels. Thus, paper transactions still exist inside a single office building and the transfer needed within a time limit. This leads to suggesting the autonomous vehicle for solving the delivery problem. In-order-to enable such the navigation within the indoor environment, an acceptable localization accuracy must exist. The wireless fingerprinting with Generalized Regression Neural Network (GRNN) for classification suggested in this research for localization estimation. Furthermore, the estimated location fused with the Odometer to bring more stable results. The Accuracy gained about 4.1cm which enables the vehicle to localize and navigate. ZigBee modules with Arduino microcontrollers are the basic items of the research.

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