... to precool outdoor air before entering the condensers. A simulation analysis on an air-cooled chiller equipped with a direct evaporative cooler showed that when head pressure control is used, the cooler enables the condensing temperature to drop by 2.1–6.2°C, resulting in a 1.4-14.4% decrease in chiller...

...M. Liu, Ph.D., P.E.; G. Liu; I. Joo; L. Song; G. Wang Currently there is no reliable and accurate method available for building pressure control due to the difficulties of accurate airflow measurement. Recently, a fan airflow station was developed that measures the fan airflow using the fan head...

... . Manuscript received by the ASME Solar Energy Division, January 2002; final revision, August 2002. Associate Editor: A. Reddy. 01 January 2002 01 August 2002 04 08 2003 air conditioning ventilation variable speed drives control system synthesis pressure control flow control...

... of the literature is given and recommendations and needs are outlined for barriers, filtration, air pressure control and bioaerosol sensors. Fire rated barriers are normally recommended to be installed between the construction area and the occupied areas of the building. The premise is that an air-tight barrier...

... pressure control dynamics transients temperature control The purpose of this research is to experimentally study an air breathing Proton Exchange Membrane (PEM) fuel cell stack at transient and steady operating conditions. In particular, the effects of changes in temperature, humidity, air...