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Category > Business & Finance Posted 07 May 2017 My Price 5.00

A 1.8-m-diameter spherical tank of negligible thickness

A 1.8-m-diameter spherical tank of negligible thickness contains iced water at 08C. Air at 25°C flows over the tank with a velocity of 7 m/s. Determine the rate of heat transfer to the tank and the rate at which ice melts. The heat of fusion of water at 0°C is 333.7 kJ/kg.

2. In an experiment, the temperature of a hot air stream is to be measured by a thermocouple with a spherical junction. Due to the nature of this experiment, the response time of the thermocouple to register 99 percent of the initial temperature difference must be within 5s. The properties of the thermocouple junction are

respectively. If the initial temperature of the thermocouple junction is 20°C, determine the thermocouple junction diameter that would satisfy the required response time of 5s.

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Alpha Geek
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Status NEW Posted 07 May 2017 03:05 PM My Price 5.00

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file 1494172270-Answer.docx preview (175 words )
A----------- 1.-----------8-m------------di-----------ame-----------ter----------- sp-----------her-----------ica-----------l t-----------ank----------- of----------- ne-----------gli-----------gib-----------le -----------thi-----------ckn-----------ess----------- co-----------nta-----------ins----------- ic-----------ed -----------wat-----------er -----------at -----------08C-----------. A-----------ir -----------at -----------25Â-----------°C -----------flo-----------ws -----------ove-----------r t-----------he -----------tan-----------k w-----------ith----------- a -----------vel-----------oci-----------ty -----------of -----------7 m-----------/s.----------- De-----------ter-----------min-----------e t-----------he -----------rat-----------e o-----------f h-----------eat----------- tr-----------ans-----------fer----------- to----------- th-----------e t-----------ank----------- an-----------d t-----------he -----------rat-----------e a-----------t w-----------hic-----------h i-----------ce -----------mel-----------ts.----------- Th-----------e h-----------eat----------- of----------- fu-----------sio-----------n o-----------f w-----------ate-----------r a-----------t 0-----------°C----------- is----------- 33-----------3.7----------- kJ-----------/kg-----------. -----------2. -----------In -----------an -----------exp-----------eri-----------men-----------t, -----------the----------- te-----------mpe-----------rat-----------ure----------- of----------- a -----------hot----------- ai-----------r s-----------tre-----------am -----------is -----------to -----------be -----------mea-----------sur-----------ed -----------by -----------a t-----------her-----------moc-----------oup-----------le -----------wit-----------h a----------- sp-----------her-----------ica-----------l j-----------unc-----------tio-----------n. -----------Due----------- to----------- th-----------e n-----------atu-----------re -----------of -----------thi-----------s e-----------xpe-----------rim-----------ent-----------,
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