溫室環控工程決策支援軟體之建立Ⅲ.數位化濕氣圖及應用

Development of Decision Support Software for Greenhouse Environmental Control. Ⅲ. Digital Psychrometric Chart and Its Applications

方煒(Wei Fang) ； 簡志樺(Chih-Hwaf Chien)

《臺灣園藝》 52卷2期 (2006/06) Pp. 220-235

https://doi.org/10.6964/JTSHS.200606.0220

摘要

溫度與濕度控制是溫室環境控制重點，所有涉及空氣中任何熱力性質的計算譬如通風、降溫、加溫與加濕、除濕等，均需用到濕氣圖。濕空氣熱力特性之間的計算公式在美國農業工程師協會(ASAE)與美國加熱冷凍空調工程師協會(ASHRAE)所編撰的技術手冊中均有列出。過去學界依此些計算式建立的DOS版軟體較常被使用的包括美國康乃爾大學所建的PLUS與台灣大學所建的PsyChart軟體。隨著個人電腦作業系統的演進，此兩套軟體即將被淘汰，有必要重新建立適用於視窗版的軟體。本文旨在介紹使用Visual C++所撰寫的新版數位化濕氣圖軟體，此軟體不僅適用於一般環境控制工程領域，由於新增更多與植物栽培及動物熱緊迫相關的表格與計算功能，所以更適用於環控農業領域之教學、研究與實務分析之用。

關鍵字

濕氣圖 ； 熱力學性質 ； 濕空氣 ； 決策支援 ； 環控農業

並列摘要

Temperature and humidity control play important roles in greenhouse environmental control. Engineering calculations of ventilation, cooling, heating, humidification and dehumidification processes can be best described by using psychrometric chart. Researchers developed software based on equations describing relationships among thermodynamics properties of moist air can be found published in fundamentals of ASAE and ASHRAE. The two most popular software was 'PLUS', developed by Prof. Albright of Cornell Univ., and 'Psychart' developed by Author at National Taiwan University. The advancement of the computer operating system has made DOS based software obsolete. The purpose of this paper is to describe the Windows based new 'Psychart' software developed using Visual C++. More features include fundamentals and applications in both greenhouse and animal housing engineering have been added to the software, thus making it a better tool to be used in the field of CEA (Controlled Environment Agriculture).

並列關鍵字

psychrometric chart ； thermodynamic properties ； moist air ； decision support ； controlled environment agriculture