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1 INTRODUCTION ¼ò½é .... 7 1.1 BACKGROUND ±³¾° ...... 7 1.2 SCOPE OF THIS GUIDE Ö¸ÄÏ·¶Î§ ........... 7 1.3 OBJECTIVES OF THIS GUIDE Ö¸ÄÏÄ¿µÄ ................. 9 1.4 DEFINITIONS ¶¨Òå ........ 9 1.5 REFERENCES ²Î¿¼ÎÄÏ× ..... 10 2. FUNDAMENTALS OF HVAC ¿ÕÆø¾»»¯ÏµÍ³µÄ»ù±¾ÔÔò ......... 13 2.1 INTRODUCTION ¼ò½é ...... 13 2.2 WHAT IS HVAC? ......... 14 2.2.1 People comfort ÈËÔ±µÄÊæÊÊ ....... 14 2.2.2 Product and Process Considerations²úÆ·Ó빤ÒÕ×¢ÒâÊÂÏî .... 16 2.2.3 How does the HVAC system control these parameters? ¿ÕÆø¾»»¯ÏµÍ³ÈçºÎ¿ØÖÆÕâЩ²ÎÊý£¿ ..18 2.2.4 What can¡¯t the HVAC System do? ¿ÕÆø¾»»¯ÏµÍ³²»ÄÜ×öʲô£¿ ...... 18 2.3 AIRFLOW FUNDAMENTALSÆøÁ÷»ù±¾ÔÔò .......... 19 2.3.1 Introduction¼ò½é ....... 19 2.3.2 Ventilation Fundamentalsͨ·ç»ù±¾ÔÔò.......... 19 2.3.3 Contamination ControlÎÛȾ¿ØÖÆ ........ 20 2.3.4 AirlocksÆøÕ¢ ........ 21 2.3.5 Classified Space ·ÖÀà¿Õ¼ä ................ 21 2.3.6 Total Airflow Volume and Ventilation Rate×Ü·çÁ¿Óëͨ·çÂÊ ...... 23 2.3.7 Room Distribution and Quality of incoming air·¿¼ä²¼¾ÖºÍ½øÆøÖÊÁ¿ ... 26 2.3.8 Airflow Direction and PressurizationÆøÁ÷·½ÏòÓëÔöѹ......... 26 2.4 PSYCHROMETRICS ʪ¶È²â¶¨·¨ .... 27 2.4.1 Introduction¼ò½é ...... 27 2.4.2 Basic Properties of Air¿ÕÆøµÄ»ù±¾ÐÔÖÊ ................ 28 2.4.3 Psychrometric Properties of Air¿ÕÆøµÄʪ¶ÈÐÔÖÊ ....... 29 2.5 EQUIPMENT É豸 ...... 30 2.5.1 Introduction ¼ò½é...... 30 2.5.2 Air Handing Unit (Ahu) ¿ÕÆø´¦Àíµ¥Ôª .......... 30 2.5.3 Fan·ç»ú ..... 30 2.5.4 Fume Exhaust/ Extraction SystemÑ̳¾Åųýϵͳ ...... 31 2.5.5 Heating Coil¼ÓÈÈÐý¹Ü .. 31 2.5.6 Cooling Coil ÀäÈ´ÅÌ¹Ü . 31 2.5.7 Humidifier ÔöʪÆ÷ ...... 31 2.5.8 Dehumidifier ³ýʪÆ÷ ... 31 2.5.9 Air Filtration ¿ÕÆø¹ýÂËÆ÷ . 31 2.5.10 Ductwork ¹ÜµÀϵͳ .... 31 2.5.11 Damper And Louver ·çÃźÍÌì´° ............. 32 2.5.12 Diffuser and Register À©É¢Æ÷ºÍµ÷·çÆ÷ ........... 32 2.5.13 Ultraviolet (UV) Light ×ÏÍâµÆ......... 32 2.6 HVAC SYSTEM CONFIGURATION HVACϵͳÅäÖà ......... 33 2.6.1 Introduction ¼ò½é........ 33 2.6.2 Basic System Types »ù±¾ÏµÍ³ÀàÐÍ ......... 34 ~~~~~~~~ ~~~~~~~~ ÏÂÔØ£ºhttp://ishare.iask.sina.com.cn/f/17709418.html |
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