Clean Room Hvac Design

Introducing air in a manner to prevent stagnant areas where particles could accumulate.

Clean room hvac design.

This means that the hvac system must be capable of conditioning more than double the air. Detailed discussions will cover airflow quantity velocity flow patterns and floor arrangement key controlling variables on cleanroom s air cleanliness air shower airlock and basic pressurization. Cleanroom hvac engineering is not an easy thing. One important item to note is that all csp areas and anterooms are cleanrooms and require hepa filtered supply air.

Identification of critical area type and placement is important to hvac design and air distribution. Standard cleanroom a c module. Supplying airflow in sufficient volume and cleanliness to support the cleanliness rating of the room. Clean room recirculation units simple low pressure recirculating ahu design with very low unit pressure drop units are scheduled for 3 0 tsp which includes terminal hepa dp.

The hvac system for cleanrooms is a specialized field requiring thorough understanding of cleanliness guidelines airflow streams room pressurization temperature humidity and filtration requirements knowledge of codes and standards specialty equipment instrumentation and control and many more details. Commonly a cleanroom service corridor needs to be designed slightly positive or neutral pressure do not design it i n negative pressure unless a du al compartment lock is utilized. Hvac design is driven by the required cleanliness of the room iso class but also by the required temperature humidity and pressure differential. The amount of air is different in an iso class 6 and iso class 8 cleanroom.

It takes a mix of engineering skills understanding the particle generating potential of the process and experience. These conditions are dictated by the process involved in the cleanroom and the comfort of the personnel working inside the room. In these applications heat removed from the cleanroom is vented into the room outside. Compounding pharmacies typically have two room types with anterooms placed between or adjacent to each room.

The 4 important air conditioning design considerations for clean room system design are. The first will discuss the fundamentals of cleanrooms and hvac systems design including the classifications of cleanrooms cleanroom iso standards design and testing guidelines by ashrae and nebb particulate sources from indoor and outdoor and their impacts on cleanroom air cleanliness.