امکان‌سنجی فنی و اقتصادی به‌کارگیری مبدل حرارتی لوله‌گرمایی برای بهبود رطوبت‌زدایی در هواساز

نوع مقاله : مقاله پژوهشی

نویسنده

پژوهشگاه نیرو، تهران، ایران

چکیده

در این مقاله برای اولین بار استفاده از لوله‌گرمایی برای بهبود رطوبت‌زدایی در هواساز در شرایط اقلیمی گرم و مرطوب ایران مورد مطالعه فنی و اقتصادی قرار گرفته است. دو نوع ساختمان یکی با 100% هوای تازه و دیگری با 25% هوای تازه مد نظر است. محاسبات همزمان کویل سرمایشی و مبدل حرارتی لوله گرمایی ارائه شده و نتایج آن با نتایج نرم‌افزار یک شرکت معتبر سازنده مقایسه و اعتبارسنجی شده است. همچنین محاسبات مربوط به عملکرد هواساز دارای لوله‌گرمایی با هواساز مرسوم مقایسه شده است. بر اساس نتایج، استفاده از لوله گرمایی در هواساز 25% هوای تازه، موجب کاهش 25% مصرف برق می‌شود و در هواساز 100% هوای تازه، 5% مصرف برق کاهش می‌یابد. در محاسبات اقتصادی، دو سناریو مطرح است: اینکه لوله‌گرمایی به عنوانی جزیی از هواساز جدید در کارخانه نصب شود و یا اینکه لوله‌گرمایی بر روی هواساز در حال بهره‌برداری نصب شود. فارغ از مساله صرفه‌جویی انرژی، هواساز جدید مجهز به لوله‌گرمایی بیش از 20% ارزانتر از هواساز مرسوم است. بهای انرژی از دو دیدگاه در نظر گرفته شده است: دیدگاه مصرف‌کننده و دیدگاه حاکمیتی. در یکی از سناریوها نرخ بازگشت داخلی از دیدگاه حاکمیتی 45% بوده و دوره بازگشت سرمایه حدود 5 سال است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Techno-economic feasibility study of using heat pipe heat exchanger to improve dehumidification in air-handling unit

نویسنده [English]

  • Ramin Hajian
Niroo Research Institute
چکیده [English]

Techno-economic feasibility study of using wrap around heat pipe heat exchanger (WAHP) to improve dehumidification in air-handling units (AHU) was carried out. Hot and humid climate conditions of north of Iran were applied. Two types of buildings, i.e. with 100% and 25% fresh air were studied. Coupled calculations of cooling coil and WAHP are presented. Corresponding results were validated with outputs of a software belonged to a reputable WAHP manufacturer. Performances of WAHP-AHU and conventional AHU are compared. For economic analyses, two scenarios are considered; first, WAHP is installed as a part of a brand new AHU in the factory. Second, WAHP is installed as a retrofit on an existing an under-operation AHU. Results show that 5% and 25% of electricity savings are obtained by using WAHP on AHU of buildings with 100% and 25% fresh air, respectively. Also, regardless of energy consumption, the brand new WAHP-AHU is more than 20% cheaper than the conventional AHU. For energy tariffs, there are two perspectives: a consumer perspective (with subsidies) and a governmental perspective (including no subsidy). From the governmental perspective, adding a WAHP to under-operation AHUs is profitable, i.e. an IRR of 45% and a 5 years investment return is achievable.

کلیدواژه‌ها [English]

  • Heat pipe
  • air-handling unit
  • dehumidification
  • feasibility study
  • heat exchanger

مراجع

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نشریه مهندسی مکانیک امیرکبیر
دوره 55، شماره 3
خرداد 1402
صفحه 303-336

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