One of the effective methods to improve the thermal efficiency of solar collectors is using nanofluids as the coolant. The present study experimentally investigated the effect of SiO2/water nanofluid with 1% mass fraction on the performance of a symmetric collector, i.e. conical solar collector. The conical solar collector with 1 m2 area and normal to the earth was tested in Ahvaz, a city in th...

Ammonia refrigeration systems typically offer many energy efficiency opportunities because of their large power-draw, long runtimes and dynamic operation. Ammonia refrigeration system energy use is highly dependent upon condensing head pressure, which in turn is a function of evaporative condenser capacity and control. This paper investigates the relationship between system energy use, condense...

By comparing EnergyPlus with other energy simulation tools, this paper explores how to use EnergyPlus to construct models to accurately simulate complex building systems as well as the interrelationships among sub-systems such as HVAC, lighting and service hot water systems. Then energy consumption and cost of a large public building is simulated and calculated for LEED certification using Ener...

one of the effective methods to improve the thermal efficiency of solar collectors is using nanofluids as the coolant. the present study experimentally investigated the effect of sio2/water nanofluid with 1% mass fraction on the performance of a symmetric collector, i.e. conical solar collector. the conical solar collector with 1 m2 area and normal to the earth was tested in ahvaz, a city in th...

Data center is a vital location that must be managed. The room contains central devices are essential for operational continuity of the information system. Like PT Pamapersada Nusantara data center, this needs to maintained according standards. One thing temperature, humidity, and electricity because they have direct impact on IT equipment can potentially fatal if not in standard conditions. Me...