Optimization of data center performance for reduction in power and cooling costs is crucial to the growth of IT services both in enterprise and consumer sector. Significant work has been conducted in the past to understand the thermodynamic variables and parameters that influence the environmental conditions of the rooms vis-a-vis the computer room air conditioning (CRAC) units, racks and serve...

Several projects involving high-level thermal management — such as eliminating “hot spots” or reducing cooling costs through intelligent workload placement — require ambient air temperature readings at a fine granularity. Unfortunately, current thermal instrumentation methods involve installing a set of expensive hardware sensors. Modern motherboards include multiple on-board sensors, but the v...

A new numerical model has been developed for the simulation of pate-fin-tube type of cooling and dehumidifying coils widely used in the air conditioning industry. The model discretizes the coil into nodes along the coolant path and carries out repetitive marches from the coolant inlet to its outlet while simultaneously updating the values of the air stream properties for obtaining quick converg...

In hot summers, air conditioning (AC) and mechanical ventilation (such as fans) are used cooling modes that strongly influence the resultant indoor environment, like thermal comfort quality in shops of a Nanning arcade street (qilou). The circulation mode greatly affects environment level freshness. approaches for effectively improving developed qilou with air-conditioner humid region southern ...

• Experimental demonstration of two stage desalination and cooling • Use of chilled water for condensation of humid air • Simulation of experimental results • Comparative study on conventional condensation and improved condensation • Improved design of proposed integrated plant a b s t r a c t a r t i c l e i n f o Humidification–dehumidification (HDH) desalination is a simple and cost effectiv...

This paper presents the experimental as well as the simulated performance studies on the transcritical CO2 heat pumps for simultaneous water cooling and heating; effects of water mass flow rates and water inlet temperatures of both evaporator and gas cooler on the cooling and heating capacities, system COP and water outlets temperatures are investigated. Study shows that both the water mass flo...

Abstract The performance and life cycle of Li-ion batteries are governed by the maximum temperature uniformity distribution in battery pack, an efficient thermal management system is highly desired to keep operating pack within safe limits. Air cooling has received extensive attention area management. However, intensification air-cooling modules essential while keeping simplicity design satisfy...

The paper examines the effect of the solar chimney’s stack height, depth, width and inlet position on the interior performance (air temperature and speed at 1.20 m height above the ground) as well as proposes an optimal tropical solar chimney design. Simulations show that the output air temperature remains constant while the solar chimney’s width is the most significant factor influencing outpu...

In this white paper, the warm water direct liquid cooling solution implementation in the CCS cluster solution is described. First, literature review of a range of direct liquid cooling solutions implemented in various competing vendors and their pros and cons are briefly presented. Design choices of datacenter cooling water distribution mechanisms (single loop vs primary/secondary loops), types...