نتایج جستجو برای: شاخص pmv ppd
تعداد نتایج: 78002 فیلتر نتایج به سال:
Taking a typical two-person office as the research object, indoor thermal comfort of radiant cooling-displacement ventilation air-conditioning, cooling-personalized air-supply and all-air air-conditioning were simulated studied, index properties was analyzed. It found that personnel activity area with had lowest air supply temperature, PMV PPD, speed met requirements. The effect human body is s...
از جمله نیازهای مهم محیطی، نگهداری شرایط آسایش حرارتی برای ساکنان است. این عامل اثر مستقیمی بر سلامت، میزان بهرهوری و روحیة افراد دارد. از سوی دیگر، ارزیابی آسایش حرارتی، فرایندی آگاهانه و دشوار است و مستلزم آگاهی از عوامل بسیاری چون شاخصهای فیزیکی، فیزیولوژیکی، ذهنی، روانشناختی و عوامل دیگر میباشد. برای برآورد شرایط آسایش حرارتی دو روش تطبیقی و توازن حرارتی وجود دارد. در این مقاله توضیح...
Traditional buildings are one type of structure that can adapt to a dynamic environment. Some functions the building’s spaces have been changed new requirements, but building's overall shape has preserved. The purpose this study was examine and determine differences in perceived thermal comfort values between occupants visitors inside building. Using observation method analyzing data through ...
International thermal comfort standards are applicable for the design and operation of either mechanically cooled or naturally buildings limited guidance is given mixed-mode buildings. In this study, a control framework was defined based on adaptive model PMV-PPD method. The proposed tested using simulation-based analysis central module an office building. results were compared with objective t...
This study aimed to comprehensively investigate the thermal comfort and physiological psychological effects according tree density in forest environments during rest after physical activities summer. Participants consisted of 18 male university students (average age: 24.0 ± 1.6 years old), a within-subjects experimental design was used. sat on chair for 5 min rest, performed step-box exercise 8...
Comparison of the Thermal Performances of the Direct-Condensation Panel with Different Aspect Ratios
The direct-condensation panel was demonstrated to be effective in reducing carbon emissions of space heating for its high energy efficiency. To expand application prospects, the thermal performances Direct-Condensation Panel (DCP) with various aspect ratios are investigated and compared this paper. results show that vertical temperature gradients working area 0.1 m 1.5 1.6°C 3.3°C DCP ratio 0.4...
در تحلیل اقلیم آسایشی روستای صور، واقع در استان آذربایجان شرقی، از سه شاخص دمای معادل فیزیولوژی (pet) و متوسط نظرسنجی پیش بینی شده (pmv) و شاخص دمای موثر استاندارد (set) استفاده شده است. در این تحقیق اطلاعات اقلیمی که از نزدیکترین ایستگاه سینوپتیک موجود در منطقه گردآوری شده است به ارزیابی شرایط اقلیم آسایشی روستای مورد مطالعه به صورت روزانه و ماهانه می پردازد. از بین سه معیار فوق الذکر مدل ،ra...
This study investigates the applicability of User-DefinedFunctions (UDFs) for determination of thermal comfort indices for non-uniform environments. The demand for such an investigation derived from the need to evaluate thermal environments in aircraft cabins in a more comprehensive way. It is normal practice by Airbus to determine the initial layout of ventilation systems also on the basis of ...
This paper presents an empirical approach to design ideal workplaces using the PMV-PPD (predicted mean vote–predicted percentage dissatisfied) method set in ISO 7730 terms of thermal comfort. The key concept behind our is that overall employee satisfaction might be improved if they can select most suitable desk based on their personal comfort preferences. To support sharing, we designed a map t...
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