نتایج جستجو برای: radiant intesity
تعداد نتایج: 2987 فیلتر نتایج به سال:
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در اثر برخورد پرتوهایی با طول موج کوتاه به یک سطح، دمای آن افزایش می یابد و این فرایند سبی گرم شدن سطح می گردد. جهت کاهش دمای یک سطح از پوشش های انتخابی انعکاسی می توان استفاده می گردد. دمای سطح مورد استفاده باید زیر نقطه ذوب یا فداشوندگی باشد در این پایان نامه، اثرات انرژی تابشی بر کره های پوششدار بررسی شده که کاربرد اصلی آن در طراحی لنزهای صنعتی در فن آوری مایکروویو می باشد. توسط مدل های تئور...
An open question in the study of quasiconvex function is the characterization of the class of functions which are sum of quasiconvex functions. In this paper we restrict attention to quasiconvex radiant functions, i.e. those whose level sets are radiant as well as convex and deal with the claim that a function can be expressed as the sum of quasiconvex radiant functions if and only if it is rad...
Introduction: Introduction: Thermal comforts are one of the most human concerns in working as was as living environments in the past half century. Thermal comfort is the condition in which people are satisfied with the thermal environment, mentally. One of the new heating system employed in individual units is radiant heating system .The purpose of this study was to investigate the performance ...
The radiant time series method is a new method for performing design cooling load calculations, derived from the heat balance method. It effectively replaces all other simplified (non-heat-balance) methods such as the cool#zg load temperature difference~solar cooling load~cooling load factor method (CLTD/SCL/CLF), the total equivalent temperature difference~time averaging method (TETD/TA), and ...
In the present paper, we have presented a Maxwellian boundary-type solution for total internal reflection with unbounded incident waves at an interface between two nonabsorbing media, in which the instantaneous, time varying, and time averaged radiant fluxes have been determined at all points in the two media. Solutions for the s and p polarizations were found for which the instantaneous tangen...
Background: Heat stress as a harmful physical agent in workplace, if is not properly controlled, can cause undesirable effects on the performance and health of personnel. This study aimed to evaluate the heat stress and efficacy of engineering interventions on WBGT index in work station of the workers in a forging industry. Methods: This experimental study evaluated WBGT index in one of the fo...
The objective of this study is to improve the design of hydronic radiant panel systems through the understanding of the thermal performance of panel systems. The scope of this study includes performing experiments using testing facilities and the radiant panel ceiling in the Energy Research House, and developing a theoretical model that can predict heat transfer from a radiant ceiling panel. In...
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