Problem Set
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An air cooler uses steel pipes within a shell to cool 200 kg/hr of air from 85°C to 30°C. The air flows through tubes while cooling water flows through the shell of a 1-shell, 2-tube pass heat exchanger. Given heat transfer coefficients and costs, the optimum exit temperature of the cooling water and optimum length of tubes need to be calculated to most efficiently cool the air.
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An air cooler uses a bundle of steel pipes inside a shell to cool air from 85°C to 30°C at a rate of 250kg/hr. Cooling water at 25°C flows through the shell and can be supplied at any rate. The heat transfer coefficients are 50 W/m2K for the air and 2100 W/m2K for the water. Given the annual costs of water, fixed charges, and cooler cost per area, calculate the optimum exit temperature of the water and optimum length of tubes.
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An air cooler uses bundles of steel pipes within a shell to cool air from 82°C to 27°C using cooling water. The air flows through the pipes while water flows over the pipes in the shell. Given the heat transfer coefficients, cooling water cost, annual fixed charges, and cooler cost, calculate the optimum exit temperature of the water and optimum length of pipes.
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The document describes designing an air cooler to lower the temperature of 200 kg/hr of air from 80°C to 28°C using cooling water at 18°C. It calculates the optimum exit temperature of the cooling water and length of steel pipes to maximize heat transfer efficiency within the given constraints. The optimum exit temperature of the cooling water is determined to be 92.5°C and the optimum length of the steel pipes is calculated to be 747.64 meters.
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An air cooler uses a bundle of steel pipes inside a shell to cool air from 85°C to 30°C at a rate of 250kg/hr. Cooling water at 25°C flows through the shell and can be supplied at any rate. The heat transfer coefficients are 50 W/m2K for the air and 2100 W/m2K for the water. Given the annual costs of water, fixed charges, and cooler cost per area, calculate the optimum exit temperature of the water and optimum length of tubes.
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An air cooler uses bundles of steel pipes within a shell to cool air from 82°C to 27°C using cooling water. The air flows through the pipes while water flows over the pipes in the shell. Given the heat transfer coefficients, cooling water cost, annual fixed charges, and cooler cost, calculate the optimum exit temperature of the water and optimum length of pipes.
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The document describes designing an air cooler to lower the temperature of 200 kg/hr of air from 80°C to 28°C using cooling water at 18°C. It calculates the optimum exit temperature of the cooling water and length of steel pipes to maximize heat transfer efficiency within the given constraints. The optimum exit temperature of the cooling water is determined to be 92.5°C and the optimum length of the steel pipes is calculated to be 747.64 meters.
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一比一原版新西兰奥塔哥大学毕业证（otago毕业证）如何办理
一模一样【微信：A575476】【新西兰奥塔哥大学毕业证（otago毕业证）成绩单Offer】【微信：A575476】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：A575476】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：A575476】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
Company Valuation webinar series - Tuesday, 4 June 2024
This session provided an update as to the latest valuation data in the UK and then delved into a discussion on the upcoming election and the impacts on valuation. We finished, as always with a Q&A
Building Your Employer Brand with Social Media
Presented at The Global HR Summit, 6th June 2024
In this keynote, Luan Wise will provide invaluable insights to elevate your employer brand on social media platforms including LinkedIn, Facebook, Instagram, X (formerly Twitter) and TikTok. You'll learn how compelling content can authentically showcase your company culture, values, and employee experiences to support your talent acquisition and retention objectives. Additionally, you'll understand the power of employee advocacy to amplify reach and engagement – helping to position your organization as an employer of choice in today's competitive talent landscape.
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3 Simple Steps To Buy Verified Payoneer Account In 2024
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Top mailing list providers in the USA.pptx
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