Do centralized cooling systems economize free cooling hours?
Existing studies on centralized cooling systems focus on i) M aximizing free cooling hours ; Li et al. investigated the energy performance of data center cooling systems with a water-side economizer by optimizing free cooling switchover temperature and cooling tower approach temperature.
Do data centers need centralized cooling systems?
The current design of the centralized cooling systems for data centers is based on ideal IT loading conditions (i.e., 100 % loading). However, such conventional design often results in significant oversized cooling systems and leads to substantial energy waste, since most data centers operate at part load in their lifespan.
Should centralized cooling systems have multiple chillers under progressive loading?
However, such conventional design often results in significant oversized cooling systems and leads to substantial energy waste, since most data centers operate at part load in their lifespan. To address this issue, this study proposes an optimal design for centralized cooling systems with multiple chillers under progressive loading.
Should data center cooling systems have a pressure-reset control strategy?
For data center cooling systems established in recent years, the pressure-reset control strategy for chilled water pumps is preferred because it is more energy efficient under partial load working conditions. 3.4. Capital cost models of cooling equipment
Do optimized cooling systems save energy?
The results show that the optimized cooling systems could operate more energy-efficiently, despite decreased free cooling hours (13–860). Significant cooling energy savings over the lifespan could be achieved, i.e., 4–22 %, corresponding to the PUE reductions of 0.02–0.11, depending on climate conditions and control strategies. 1. Introduction 1.1.
What is a cooling system model?
A cooling system model is developed using the test data of cooling equipment and typical control algorithms. Two control strategies for chilled water pumps are considered as two scenarios, i, constant pressure setting (CPS), ii, near optimal pressure resetting (OPR).
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We found that the potential of use the centralized LHTES system to reduce the cooling load is high with a wider phase change temperature range. The centralized LHTES …
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The intensification of research performed under the banner of the Smart Grid concept facilitated the work on the development and creation of integrated energy supply systems that take into account the activity of consumers in managing their own energy supply, the use of energy storage, modern information and telecommunication technologies, etc. [23], [24], [25], …
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By using a centralized district energy plant environmental impacts is reduced down to 65% with an efficiency that reach 75% by using cogeneration technologies [80]. ... Optimal chiller loading in a district cooling system with thermal energy storage. Energy, 50 (1) (2013), pp. 445-453. View PDF View article View in Scopus Google Scholar [78]
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There are many potential energy storage resources in a centralized air-conditioning system of an airport to improve its energy flexibility, as shown in Fig. 1 [10].The cooling plant is usually equipped with water or ice storage tanks for peak shaving and valley filling of the load.
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The unbalance between the renewable energy sources and user loads reduces the performance improvement of regional integrated energy systems (RIES), in which the multi-energy storage system with battery and heat tank is necessarily integrated. This paper aims to optimize the sites and capacities of multi-energy storage systems in the RIES.
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