هدف از این مقاله، بررسی اثر نانو ذرات بر راندمان گردآورنده های خورشیدی صفحه تخت می باشد. در این مطالعه روش سنتز مستقیم برای آماده سازی نانوسیال مس بر پایه آب به عنوان یک سیال کاری آزمایش( سیال عامل) و در یک گردآورنده خورشیدی(تخت) به کار گرفته شده است. در این شرائط روش93 ashrae برای آزمایش گردآورنده های خورشیدی مورد استفاده قرار گرفته است. با توجه به نتایج تجربی حاصل، بازده کلی زمانی که غلظت نان...

Several studies on indoor air quality (IAQ) and sick building syndromes have been completed over the last decade, especially in cold countries. Efforts to make homes airtight improve energy efficiency created buildings with low ventilation rates, resulting build-up of pollutants harmful levels that would be otherwise unacceptable outdoors. This paper analyzed infiltration temperatures, variatio...

As rapid growth in the construction industry continues to occur in China, the increased demand for a higher standard living is driving significant growth in energy use and demand across the country. Building codes and standards have been implemented to head off this trend, tightening prescriptive requirements for fenestration component measures using methods similar to the U.S. model energy cod...

In times of unprecedented climate change and energy scarcity, the design delivery energy-efficient sustainable buildings are utmost importance. This study aimed to a hotel building for hot dry conditions perform its performance analysis using simulation tools. The model was constructed by graphical tool OpenStudio EnergyPlus following ASHRAE Standard 90.1. To reduce demand hotel, parametric con...

Recent research has looked into the potential for energy savings from adopting setpoint temperatures based on adaptive comfort. The recently suggested Adaptive-Comfort-Control-Implementation Script (ACCIS), a computational method that expands use of air conditioning to comfort, can be used accomplish this. user's setup and an Input Data File (IDF) are by ACCIS convert PMV-based EnergyPlus model...

The main objective of this investigation was to design and investigate a radiant panel cooling system on small scale building type (office) under the central Sudan climatic conditions so as to explore the benefits of radiant cooling systems over conventional air conditioning systems (Variable air volume systems). Transient heat conduction of building (finite difference method) was used to evalu...

Thermal comfort of building occupants is a major criterion in evaluating the performance of building systems. It is also a dominant factor in designing and optimizing building’s operation. However, existing thermal comfort models, such as Finger’s model currently adopted by ASHRAE Standard 55, rely on factors that require bulky and expensive equipment to measure. This paper attempts to take a r...

couple of hours later, there was swelling and reddening of the margins of the ulcers, frequently accompanied by fever up to 38°C. These symptoms lasted for a few hours and subsided spontaneously or with the help of minor analgesics. The patients tolerated this inconvenience, because they soon saw a favorable response. In fact, the latter was dramatic in three of them (patients no. 1, 2, and 4) ...

IN MYELOMA, THE ROLE of the bone marrow microenvironment has been shown to be of increasing importance in supporting the malignant plasma cell.1,2 Specifically, nonmalignant stromal cells in the bone marrow from myeloma patients have been shown to promote the growth and prevent the apoptosis of malignant plasma cells largely by the production of interleukin-6 (IL-6).1-3 Recently, a new member o...