Dynamic Analysis on Energy-Saving Effect of Distributed Cooling System in TBS

2014 ◽  
Vol 472 ◽  
pp. 1047-1051
Author(s):  
Tian Jian Yang ◽  
Yang Li
Keyword(s):  
Dynamic Analysis ◽  
Energy Saving ◽  
Dynamic Simulation ◽  
Heat Balance ◽  
Air Conditioning ◽  
Cooling System ◽  
Balance Model ◽  
Saving Effect ◽  
The Heat Balance

In order to evaluate the energy-saving effect of Distributed Cooling System (DCS) analytically, the heat balance model of DCS in a TBS is established and then dynamic simulation is employed. The numeral results show that DCS has much better energy-saving effect than traditional air conditioning (AC) and the energy-saving effect is steady all year round.

Performance and Affection Analysis on Cooling Module in the Vehicle Working Conditions

2014 ◽  
Vol 472 ◽  
pp. 348-352
Author(s):  
He Chang ◽  
Xiu Min Yu ◽  
Jing Hua Lv ◽  
Ming Zhou ◽  
Ge Li
Keyword(s):  
Simulation Model ◽  
Thermal Management ◽  
Working Conditions ◽  
Heat Balance ◽  
Air Conditioning ◽  
Cooling System ◽  
Balance Test ◽  
Simulation Results ◽  
Cooling Module ◽  
The Heat Balance

Cooling module simulation for vehicle has been built according to the heat balance test, and the simulation results are compared with the test data to verify the authenticity of the module. This simulation model provides an effective platform for vehicle thermal management analysis. Module is used to simulate the air conditioning running and to find how different ambient temperaturesto effect the performance of the cooling module. The air conditioning working and ambience temperaturewhichis significantly influence the performance of the cooling system.

Energy Consumption Analysis on Office Building Ventilation

2012 ◽  
Vol 516-517 ◽  
pp. 1139-1143
Author(s):  
Ke Chun Sun ◽  
Wei Jun Zhang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Room Temperature ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Energy Simulation ◽  
Office Building ◽  
Saving Effect ◽  
Night Ventilation

Chongqing weather conditions as the representative, energy simulation software DesT-c Chongqing office building energy simulation analysis, simulated natural building under different ventilation conditions at room temperature, the energy consumption of building cooling load and air-conditioning system changes, with an emphasis on energy-saving effect of the night ventilation; The study showed that in Chongqing reasonable use of ventilation reduce building natural room temperature to a certain extent; Sensitive indicators of building air conditioning energy consumption than the heating energy consumption of ventilation was significantly; Night ventilation when the number of ventilators is less than 5 times / h, the energy saving effect is very significant.

scholarly journals Outdoor Air-Cooling System for a Computer Room and Its Corresponding Energy-Saving Effect

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5719
Author(s):  
JiHyun Hwang ◽  
Taewon Lee
Keyword(s):  
Power Consumption ◽  
Energy Saving ◽  
Data Centers ◽  
Cooling System ◽  
Stable Operation ◽  
Air Cooling ◽  
Outdoor Air ◽  
Air Conditioners ◽  
Air Cooling System ◽  
Saving Effect

The recent expansion of the internet network and rapid advancements in information and communication technology are expected to lead to a significant increase in power consumption and the number of data centers. However, these data centers consume a considerable amount of electric power all year round, regardless of working days or holidays; thus, energy saving at these facilities has become essential. A disproportionate level of power consumption is concentrated in computer rooms because air conditioners in these rooms are required to operate throughout the year to maintain a constant indoor environment for stable operation of computer equipment with high-heat release densities. Considerable energy-saving potential is expected in such computer rooms, which consume high levels of energy, if an outdoor air-cooling system and air conditioners are installed. These systems can reduce the indoor space temperature by introducing a relatively low outdoor air temperature. Therefore, we studied the energy-saving effect of introducing an outdoor air-cooling system in a computer room with a disorganized arrangement of servers and an inadequate air conditioning system in a research complex in Korea. The findings of this study confirmed that annual energy savings of up to approximately 40% can be achieved.

Energy-saving effect of utilizing recirculated air in electric vehicle air conditioning system

2019 ◽  
Vol 102 ◽  
pp. 122-129 ◽  
Author(s):  
Leyan Pan ◽  
Cichong Liu ◽  
Ziqi Zhang ◽  
Tianying Wang ◽  
Junye Shi ◽  
...  
Keyword(s):  
Energy Saving ◽  
Electric Vehicle ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Saving Effect

scholarly journals Substantial Errors in Estimates of Sap Flow Using the Heat Balance Technique on Woody Stems under Field Conditions

1992 ◽  
Vol 117 (2) ◽  
pp. 351-356 ◽  
Author(s):  
Kenneth A. Shackel ◽  
R. Scott Johnson ◽  
Charles K. Medawar ◽  
Claude J. Phene
Keyword(s):  
Heat Balance ◽  
Sap Flow ◽  
Prunus Persica ◽  
Negative Temperature ◽  
Rate Of Change ◽  
Field Conditions ◽  
Balance Model ◽  
Ambient Conditions ◽  
Stem Temperature ◽  
The Heat Balance

The heat balance method was used to estimate transpirational sap flow through 60- to 75-mm-diameter stems (trunks) of 3-year-old peach [Prunus persica (L.) Batsch. cv. O'Henry] trees under field conditions. On rare occasions, heat balance estimates agreed well with independent lysimetric measurements, but on most occasions, heat balance estimates of sap flow were unrealistic in both direction and magnitude. In some cases, the errors in sap flow approached two orders of magnitude and were always the result of a calculation involving division by a very small and sometimes negative temperature differential between the stem surface temperature above and below the gauge heater. The occurrence of negative temperature differentials under positive transpiration conditions may be inconsistent with a fundamental assumption in the heat balance model, namely that temperature differentials are solely a consequence of the dissipation of energy supplied to the gauge heater. In the absence of heating power applied to the gauge, temperature differentials exceeding - 1C were correlated with the rate of change in stem temperature, indicating that ambient conditions themselves can impose a bias in gauge signals and, hence, influence gauge accuracy. Our results suggest that the effect of ambient conditions on gauge signals should be critically evaluated before considering heat balance estimates of sap flow as reliable under any given conditions.

The Research of Energy-Saving in Air Conditioning Water Cooling System by Frequency Conversion Pump and Constant Pressure Control

2013 ◽  
Vol 446-447 ◽  
pp. 1207-1210 ◽  
Author(s):  
Hong Jie Wang ◽  
Fang Wang ◽  
Yuan Yuan Huang ◽  
Liang Zhang
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Frequency Conversion ◽  
Constant Pressure ◽  
Cooling System ◽  
Branch Pipe ◽  
Pressure Control ◽  
Water Cooling ◽  
Water Pump ◽  
Water Cooling System

The main research point is analysis of energy conservation on water cooling system in air conditioning engineering in this paper. After discussing the running characteristics for frequency water pump controlling variable speed and changing the flow. Then the cooling system adopts the new control method that constant branch pipe pressure difference in the most unfavorable end, and the water pump in parallel configuration, combined with the frequency conversion technology. At last from the experiment data and the actual test of the water cooling system, the energy-saving effect with variable pump of constant pressure control is validated.

Dynamic Simulation of an Ejector-Based Cooling System for Residential Solar Air-Conditioning

2012 ◽  
Author(s):  
Stefano Gavioli ◽  
Jean-Marie Seynhaeve ◽  
Yann Bartosiewicz
Keyword(s):  
Dynamic Simulation ◽  
Air Conditioning ◽  
Cooling System ◽  
Geographic Location ◽  
Hot Water ◽  
Cooling Power ◽  
Dynamic Simulation Model ◽  
Hot Season ◽  
Transient Thermal ◽  
Ejector Cycle

A smart and sustainable way to produce cooling power during the hot season is through thermal activated compression. One of the most promising technology is the ejector cycle. An experimental machine based on this technology has been designed and built at Université Catholique de Louvain (UCL). This study presents a dynamic simulation model of a full house incorporating solar collectors to produce domestic hot water and to feed an ejector-based solar air-conditioning machine. The model takes into account geographic location, transient thermal house behaviour, and also integrates a performance map of the ejector cycle based on real measurement campaign. Different types of collectors and storage sizes have been studied as well. In this paper, the developed model is used to analyze and optimize operation and strategy of hot water production and air conditioning. Results show that the full solar solution may cover low energy house needs.

Study on Energy Saving from Intermittent Operation of Air-Conditioning System

2014 ◽  
Vol 672-674 ◽  
pp. 542-545 ◽  
Author(s):  
Hong Wen Jin
Keyword(s):  
Time Delay ◽  
Energy Saving ◽  
Heat Balance ◽  
Air Conditioning ◽  
System Operation ◽  
Air Conditioning System ◽  
Intermittent Operation

According to the principles of air and heat balance and aiming at air-conditioning load time delay mechanism, the boot time for air-conditioning system operation is controlled to satisfy the demand of air-conditioned environment without wasting energy [1].

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