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Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1] [2] [3]
Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.
Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each hour.
The refrigerant flow rate is changed by the change in the speed of the compressor. The turn down ratio depends on the system configuration and manufacturer. It modulates from 15 or 25% up to 100% at full capacity with a single inverter from 12 to 100% with a hybrid tandem.
A liquid (glycol based) chiller with an air cooled condenser on the rooftop of a medium size commercial building. In air conditioning systems, chilled coolant, usually chilled water mixed with ethylene glycol, from a chiller in an air conditioning or cooling plant is typically distributed to heat exchangers, or coils, in air handlers or other types of terminal devices which cool the air in ...
In 2021, Singapore's oil supply totaled 1,027,948 terajoules, a 42% increase from 2000, comprising both crude and refined products, net of exports and storage. Oil constituted 69.7% of the total energy supply. [9] All of Singapore's crude oil was imported, with imports growing by 13% since 2000. Oil products imports surged to 208.8% of total ...
Singapore English in a Nutshell: An Alphabetical Description of its Features. Singapore: Federal Publications. ISBN 981-01-2435-X. Deterding, David (2007). Singapore English. Edinburgh: Edinburgh University Press. ISBN 978-0-7486-2545-1. Low, Ee Ling; Adam Brown (2005). English in Singapore: An Introduction. Singapore: McGraw-Hill Education (Asia).
A single national time zone of UTC+08:00 has been proposed, however, it is unclear when or if it may be implemented. [9] Time in Indonesia +08:00: WITA +09:00: WIT Singapore +08:00: SGT/SST: Followed Malaysia to switch to UTC+08:00 on 1 January 1982, [10] except under Japanese occupation of Singapore during World War II. Singapore Time Malaysia ...