scholarly journals Analyzing Atrium Volume Designs for Hot and Humid Climates

2019 ◽  
Vol 11 (22) ◽  
pp. 6213
Author(s):  
Aram ◽  
Alibaba
Keyword(s):  
Thermal Comfort ◽  
User Satisfaction ◽  
Simulation Models ◽  
Thermal Simulation ◽  
Simulation Software ◽  
Humid Climate ◽  
High Rise ◽  
North East ◽  
Software Models ◽  
Hot And Humid Climates

The objective of this research was to determine the proper thermal comfort in an atrium design for single-floor, medium-rise, and high-rise buildings based on different proportions, placements, window opening ratios, and internal condition systems. EDSL Tas software was used for the dynamic thermal simulation software models, and all were analyzed based on ASHRAE 55, ISO 7730, and EN 15251 standards to determine which dynamic thermal simulation models had thermal comfort in a hot and humid climate throughout the year. This research found that for naturally conditioned single-floor and medium-rise buildings, when the atrium proportion was 1/2 of the office proportion at the southeast and center atrium location, respectively, had maximum user satisfaction. When the building’s internal spaces were mechanically conditioned with a 1/3 and 1/4 atrium proportion of the office proportion in single-floor and medium-rise buildings, respectively, thermal comfort was acceptable, especially when the atrium was located in the center for single-floor and in the northeast for medium-rise buildings. However, the naturally conditioned high-rise building with a north-east atrium that was 1/4 of the office proportion and a mechanically conditioned high-rise with a center atrium 1/3 of the office proportion had the minimum dissatisfaction throughout the year.

scholarly journals Numerical Assessment of Bioclimatic Architecture Strategies for Buildings Design in Tropical Climates: A Case of Study in Panama

2020 ◽  
Vol 197 ◽  
pp. 02006
Author(s):  
Miguel Chen Austin ◽  
Milvia Castillo ◽  
Ángela de Mendes Da Silva ◽  
Dafni Mora
Keyword(s):  
Thermal Comfort ◽  
Vernacular Architecture ◽  
Simulation Software ◽  
Indoor Environments ◽  
Design Strategies ◽  
Humid Climate ◽  
Existing Building ◽  
Numerical Assessment ◽  
Development Goals ◽  
Hot Humid Climate

The increasing concern expressed by building designers in Panama, due to new building-energy regulations, regarding sustainable development goals and energy efficiency, is leading architects to reanalyse their design strategies and evaluate the vernacular architecture. The main implications of the hot-humid climate characteristics stipulate that the need for cooling of indoor environments drives buildings’ design and settlements. This work aims to assess the use of bioclimatic architecture strategies in three existing building typologies design in Panama, in terms of thermal comfort performance. The approach adopted here is to compare and analyse the vernacular architecture with current architecture. Besides, to evaluate bioclimatic architecture strategies based on recent investigations and the guidelines proposed by Givony, Olgyay, among others. A numerical assessment was performed on the dynamic simulation software DesignBuilder, where the building’s passive strategies are evaluated in terms of operative temperature, relative humidity (rH), PMV, PPD, and discomfort hours (DH). All three houses, the HVA, HCA, and HRES were tested in three different locations within Panama City. Results showed that the strategies in HVA perform best for reducing rH levels, but the HRES performs best in overall thermal comfort performance, apart yet from the high rH levels encountered.

scholarly journals An Investigation on Indoor Temperature of Modern Double Storey House with Adapted Common Passive Design Strategies of Malay Traditional House

2021 ◽  
Vol 29 (2) ◽  
Author(s):  
Maryam Qays Oleiwi ◽  
Mohd Farid Mohamed
Keyword(s):  
Thermal Comfort ◽  
Natural Ventilation ◽  
Building Envelope ◽  
Simulation Software ◽  
Passive Cooling ◽  
Design Strategies ◽  
Housing Type ◽  
Humid Climate ◽  
Cooling Strategies ◽  
Hot Humid Climate

Past years have witnessed the popularity of traditional Malay house as a common housing type in Malaysia. However, double-storey house has become one of the common types of low-rise housing in Malaysia. Several passive cooling strategies have been adopted to cope with the hot-humid climate of Malaysia. In this study, the thermal comfort of a double-storey house was examined when different passive cooling strategies that were adopted from traditional Malay houses were applied using IES-VE 2019 building simulation software. The simulation was conducted for various design strategies such as changing concrete roof tiles to clay roof tiles, adding two small openings to the attic, removing the ceiling between the upper floor and the attic, and extending the overhang by 50% of its length for all the four facades. All these strategies were tested and compared between full-day natural ventilation and without any ventilation. The thermal comfort of these strategies was graphically defined based on the operative temperature. These analyses revealed that protecting the building envelope by extending the overhang by 50% of its length for all the four facades could ensure the best thermal comfort is achieved compared to other selected strategies. Recommendations for further studies are also outlined in this paper.

The effect of building envelope on the thermal comfort and energy saving for high-rise buildings in hot–humid climate

2016 ◽  
Vol 53 ◽  
pp. 1508-1519 ◽  
Author(s):  
Seyedehzahra Mirrahimi ◽  
Mohd Farid Mohamed ◽  
Lim Chin Haw ◽  
Nik Lukman Nik Ibrahim ◽  
Wardah Fatimah Mohammad Yusoff ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Energy Saving ◽  
Building Envelope ◽  
Humid Climate ◽  
High Rise ◽  
Hot Humid Climate

scholarly journals Correlative Impact of Shading Strategies and Configurations Design on Pedestrian-Level Thermal Comfort in Traditional Shophouse Neighbourhoods, Southern China

2019 ◽  
Vol 11 (5) ◽  
pp. 1355 ◽  
Author(s):  
Shi Yin ◽  
Werner Lang ◽  
Yiqiang Xiao ◽  
Zhao Xu
Keyword(s):  
Thermal Stress ◽  
Thermal Comfort ◽  
Southern China ◽  
Simulation Models ◽  
Outdoor Thermal Comfort ◽  
Humid Climate ◽  
Physiological Equivalent Temperature ◽  
Axis Orientation ◽  
Covered Area ◽  
The Impact

Traditional shophouse neighbourhoods (TSNs) in southern China respond well to the local hot and humid climate through proper street configurations and the integration of different shading strategies. Investigating the impact of shading strategies and configurations in TSNs on outdoor thermal comfort is valuable for guiding current urban design. Three street canyons in a TSN of Guangzhou with different shading strategies were selected as basic cases for microclimatic measurement in the summer season, i.e., alleys, streets with arcade for pedestrians, and streets with high-density greenery. After validating their simulation models in ENVI-met, five groups of parametric simulations were generated by varying the canyon aspect ratio (CHW), the canyon axis orientation, arcade proportion (AHW), and the tree-covered area (TCA). Using the physiological equivalent temperature (PET) to assess the above results, the correlative impact of different variations on pedestrian’s thermal comfort and their corresponding favourable ranges are summarized. The findings suggest that: (a) only in alleys and arcade streets, the pedestrian-level thermal comfort was significantly influenced by canyon axis orientation. (b) The thermal stress for pedestrians increased dramatically when the CHW was lower than 1.5 in alleys and 0.78 in boulevards (in TCA = 89%), while the CHW higher than 1 indicated a remarkable reduction on the PET for pedestrians in arcades. (c) The pedestrians started losing the protection from shading strategy to thermal stress when the AHW was higher than 1.33 (in canyon with CHW = 1) or the TCA was lower than 33% (in canyon with CHW = 0.78).

Study on Evacuation Strategy in High-Rise Buildings Fire

2012 ◽  
Vol 472-475 ◽  
pp. 3207-3213
Author(s):  
Shan Lu ◽  
Wen Shuo Liu ◽  
Xun Weng ◽  
Fang Zhou Li
Keyword(s):  
Simulation Models ◽  
Simulation Software ◽  
Evacuation Time ◽  
High Rise ◽  
Evacuation Strategy ◽  
Evacuation Model

This paper first proves the practicability of evacuation using elevators in high-rise buildings fire. Analyzing characteristics of the evacuation by elevators, the paper put forward an improved evacuation strategy and the corresponded improved evacuation model. In order to further prove the improved evacuation strategy can shorten the evacuation time, taking a certain building for example, this paper design many projects of evacuation, which based on different evacuation strategies. Finally, the paper modeling and simulating these projects with simulation software, results showed by simulation models can prove the large superiority of improved evacuation strategy.

A Unified Adaptive Fanger's Model for Thermal Comfort in Tropical Countries

2013 ◽  
Vol 393 ◽  
pp. 799-808 ◽  
Author(s):  
Jion Sean Pau ◽  
William K.S. Pao
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Heat Fluxes ◽  
Air Conditioner ◽  
Adaptive Model ◽  
Humid Climate ◽  
Tropical Country ◽  
Tropical Countries ◽  
Hot And Humid Climates ◽  
Thermal Preferences

Thermal comfort, which used to be a luxury in life has transformed into a necessity in modern lives. Tropical country such as Malaysia has hot and humid climate all year round. Much air conditioning is required in tropical countries to provide thermal comfort for indoor occupants. Fangers model is deterministic as it regards the heat fluxes across the boundary between humans and their thermal environment. Fangers model is adopted by ASRHAE Standard 55 in 1992 but it has over-predicted thermal preferences of those living in tropics. Malaysians who are used to hot and humid climates prefer warmer indoor temperature, as hypothesized in adaptive model. Adaptive model is said to predict thermal comfort more accurately than Fangers model as it relates the indoor comfortable temperature to outdoor air temperature. The objective of this research is to integrate the adaptive theories into Fangers model and to synthesize a new thermal comfort model which is expected to accurately predict thermal comfort in tropical countries. As the adaptive theory says that not all peoples thermal preferences are affected by thermal histories and contextual factors, the new model has proposed a broader operation range of PMV for air conditioner. The increment of PMV range from ±1.0 to ±1.17 for 80% satisfaction requirement is proved to applicable in Malaysia.

scholarly journals Performance Analysis of Hybrid Desiccant Cooling System with Enhanced Dehumidification Capability Using TRNSYS

2021 ◽  
Vol 11 (7) ◽  
pp. 3236
Author(s):  
Ji Hyeok Kim ◽  
Joon Ahn
Keyword(s):  
Thermal Comfort ◽  
Cooling System ◽  
Operation Mode ◽  
Heat Removal ◽  
Simulation Models ◽  
Coefficient Of Performance ◽  
Dimensional Structure ◽  
Dominant Factor ◽  
Exhaust Heat ◽  
Chp System

In a field test of a hybrid desiccant cooling system (HDCS) linked to a gas engine cogeneration system (the latter system is hereafter referred to as the combined heat and power (CHP) system), in the cooling operation mode, the exhaust heat remained and the latent heat removal was insufficient. In this study, the performance of an HDCS was simulated at a humidity ratio of 10 g/kg in conditioned spaces and for an increasing dehumidification capacity of the desiccant rotor. Simulation models of the HDCS linked to the CHP system were based on a transient system simulation tool (TRNSYS). Furthermore, TRNBuild (the TRNSYS Building Model) was used to simulate the three-dimensional structure of cooling spaces and solar lighting conditions. According to the simulation results, when the desiccant capacity increased, the thermal comfort conditions in all three conditioned spaces were sufficiently good. The higher the ambient temperature, the higher the evaporative cooling performance was. The variation in the regeneration heat with the outdoor conditions was the most dominant factor that determined the coefficient of performance (COP). Therefore, the COP was higher under high temperature and dry conditions, resulting in less regeneration heat being required. According to the prediction results, when the dehumidification capacity is sufficiently increased for using more exhaust heat, the overall efficiency of the CHP can be increased while ensuring suitable thermal comfort conditions in the cooling space.

Hybrid simulation of the Apollo guidance and navigation system

SIMULATION ◽  
1966 ◽  
Vol 7 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Madeline M. Sullivan
Keyword(s):  
Navigation System ◽  
Hybrid Simulation ◽  
Simulation Software ◽  
Space Environment ◽  
Massachusetts Institute Of Technology ◽  
Software Models ◽  
Digital Hardware ◽  
Institute Of Technology ◽  
Lift Off ◽  
Navigation Equipment

A hybrid simulation of the guidance and navigation system of the Apollo spacecraft is underway at the Massachusetts Institute of Technology Instrumentation Laboratory. The Apollo Guidance and Navigation equipment is digital, elec tronic, and electromechanical. The guidance and naviga tion analog and digital hardware is combined in simulation with analog and digital computers so that the hardware will be subjected to dynamic conditions approaching those found in a space environment. The instrumentation of the Apollo Guidance and Navi gation System is described as well as its adaptation to the hybrid simulation. Software models are discussed to indi cate some of the varied problems considered. Digital pro cedures which are designed to support the operator and enhance the reliability of the simulation are described. In conclusion, it becomes apparent that the judicious use of computers, together with guidance and navigation hardware and software, makes it possible to simulate in real time any part of the Apollo mission from lift-off to splash-down.

ENHANCING THERMAL COMFORT OF RESIDENTIAL BUILDINGS THROUGH A DUAL FUNCTIONAL PASSIVE SYSTEM (SOLAR-WALL)

2021 ◽  
Vol 16 (3) ◽  
pp. 155-177
Author(s):  
Shouib Mabdeh ◽  
Tamer Al Radaideh ◽  
Montaser Hiyari
Keyword(s):  
Thermal Comfort ◽  
Residential Buildings ◽  
Simulation Software ◽  
Design Parameters ◽  
Base Case ◽  
Passive System ◽  
Efficient System ◽  
Dual Functional ◽  
Solar Wall ◽  
New System

ABSTRACT Thermal comfort has a great impact on occupants’ productivity and general well-being. Since people spend 80–90% of their time indoors, developing the tools and methods that enhance the thermal comfort for building are worth investigating. Previous studies have proved that using passive systems like Trombe walls and solar chimneys significantly enhanced thermal comfort in inside spaces despite that each system has a specific purpose within a specific climate condition. Hence, the main purpose of this study is to design and configure a new, dual functional passive system, called a solar wall. The new system combines the Trombe wall and solar chimney, and it can cool or heat based on building needs. Simulation software, DesignBuilder, has been used to configure the Solar Wall, and study its impact on indoor operative temperature for the base case. Using the new system, the simulation results were compared with those obtained in the base case and analyzed to determine the most efficient system design parameters and implementation method. The case that gave the best results for solar wall configuration was triple glazed glass and 0.1 cm copper as an absorber (case 11). The results show that using four units (case D) achieves longer thermal comfort levels: 15 to 24 thermal hours during winter (compared to five hours maximum) and 10 to 19 comfort hours in summer (compared to zero).

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