scholarly journals An Applied Research on the Compound Air Conditioning System of Ground Source Direct Cooling System and Water Storage Tank System

2016 ◽  
Vol 146 ◽  
pp. 559-566 ◽  
Author(s):  
Jiying Liu ◽  
Fenghua Qin ◽  
Xiaona Xie ◽  
Linhua Zhang
Keyword(s):  
Storage Tank ◽  
Air Conditioning ◽  
Applied Research ◽  
Cooling System ◽  
Water Storage ◽  
Air Conditioning System ◽  
Water Storage Tank ◽  
Ground Source ◽  
Tank System

A case study of ground source direct cooling system integrated with water storage tank system

2016 ◽  
Vol 9 (6) ◽  
pp. 659-668 ◽  
Author(s):  
Jiying Liu ◽  
Xiaona Xie ◽  
Fenghua Qin ◽  
Shoujie Song ◽  
Donglan Lv
Keyword(s):  
Storage Tank ◽  
Cooling System ◽  
Water Storage ◽  
Water Storage Tank ◽  
Ground Source ◽  
Tank System

scholarly journals AP1000 Shield Building Dynamic Response for Different Water Levels of PCCWST Subjected to Seismic Loading considering FSI

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Daogang Lu ◽  
Yu Liu ◽  
Xiaojia Zeng
Keyword(s):  
Storage Tank ◽  
Seismic Analysis ◽  
Cooling System ◽  
Water Storage ◽  
Seismic Loading ◽  
Water Levels ◽  
Von Mises Stress ◽  
Fe Model ◽  
Water Storage Tank ◽  
Von Mises

Huge water storage tank on the top of many buildings may affect the safety of the structure caused by fluid-structure interaction (FSI) under the earthquake. AP1000 passive containment cooling system water storage tank (PCCWST) placed at the top of shield building is a key component to ensure the safety of nuclear facilities. Under seismic loading, water will impact the wall of PCCWST, which may pose a threat to the integrity of the shield building. In the present study, an FE model of AP1000 shield building is built for the modal and transient seismic analysis considering the FSI. Six different water levels in PCCWST were discussed by comparing the modal frequency, seismic acceleration response, and von Mises stress distribution. The results show the maximum von Mises stress emerges at the joint of shield building roof and water around the air inlet. However, the maximum von Mises stress is below the yield strength of reinforced concrete. The results may provide a reference for design of the AP1000 and CAP1400 in the future.

Thermal modelling of a night sky radiation cooling system

2005 ◽  
Vol 16 (2) ◽  
pp. 20-31 ◽  
Author(s):  
RT Dobson
Keyword(s):  
Storage Tank ◽  
Cooling System ◽  
Water Storage ◽  
Design Tool ◽  
Thermal Modelling ◽  
Water Storage Tank ◽  
System Components ◽  
Mathematical Equations ◽  
Night Sky ◽  
Radiation Cooling

The thermal modelling of a night sky radiation cooling system suitable for a room situated in the Namib Desert at Gobabeb, Namibia, is considered in this paper. The system consists of the following components: radiator panels, a single water storage tank, room air-to-water natural convection heat exchangers or convectors, circulating pump(s), interconnecting pipe work and temperature sensors and controls. The mathematical equations describing the thermal behaviour of the various system components are given. These equations are solved using an Excel spreadsheet and the hourly panel surface, water storage tank and room temperatures are calculated for a given internally generated heat load and weather pattern. Given the maximum allowable room temperature, the sizes of the system components may be calculated. The results obtained compared favourably with values reported in the literature. It is thus concluded that the thermal model presented can be used with confidence as a design tool for the sizing of a night sky radiation cooling system.

scholarly journals Modeling Hybrid Nuclear Systems With Chilled-Water Storage

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Corey T. Misenheimer ◽  
Stephen D. Terry
Keyword(s):  
Energy Demand ◽  
Air Conditioning ◽  
Thermal Stresses ◽  
Water Storage ◽  
Hvac System ◽  
Air Conditioning System ◽  
Water Storage Tank ◽  
System Components ◽  
Chilled Water ◽  
Cooling Loads

Air-conditioning loads during the warmer months of the year are large contributors to an increase in the daily peak electrical demand. Traditionally, utility companies boost output to meet daily cooling load spikes, often using expensive and polluting fossil fuel plants to match the demand. Likewise, heating, ventilation, and air conditioning (HVAC) system components must be sized to meet these peak cooling loads. However, the use of a properly sized stratified chilled-water storage system in conjunction with conventional HVAC system components can shift daily energy peaks from cooling loads to off-peak hours. This process is examined in light of the recent development of small modular nuclear reactors (SMRs). In this study, primary components of an air-conditioning system with a stratified chilled-water storage tank were modeled in FORTRAN 95. A basic chiller operation criterion was employed. Simulation results confirmed earlier work that the air-conditioning system with thermal energy storage (TES) capabilities not only reduced daily peaks in energy demand due to facility cooling loads but also shifted the energy demand from on-peak to off-peak hours, thereby creating a more flattened total electricity demand profile. Thus, coupling chilled-water storage-supplemented HVAC systems to SMRs is appealing because of the decrease in necessary reactor power cycling, and subsequently reduced associated thermal stresses in reactor system materials, to meet daily fluctuations in cooling demand. Also, such a system can be used as a thermal sink during reactor transients or a buffer due to renewable intermittency in a nuclear hybrid energy system (NHES).

scholarly journals Development of an open-loop ground source cooling system for space air conditioning system in hot climate like Indonesia

2018 ◽  
Vol 204 ◽  
pp. 04007
Author(s):  
Jalaluddin ◽  
Akio Miyara ◽  
Shohei Ishikawa ◽  
Rustan Tarakka ◽  
Andi Amijoyo Mochtar
Keyword(s):  
Experimental Study ◽  
Heat Exchanger ◽  
Air Conditioning ◽  
Cooling System ◽  
Open Loop ◽  
Air Conditioning System ◽  
Hot Climate ◽  
Ground Source ◽  
Actual Operation ◽  
Compressor Power

Ground source cooling system (GSCS) is promising technology to serve cooling demands of buildings. This study presents a development of an open-loop GSCS for space air conditioning at Hasanuddin University Gowa campus. Experimental study was carried-out by pumping water from well of 57 m depth and flowing the water over a heat exchanger to cool refrigerant of air conditioning (AC) unit. The performance of AC unit was investigated under actual operation with various water flowrates. The temperatures of inlet and outlet water in the heat exchanger were also measured. The system operated from 11:00 until 18:00 o’clock local time with 3 (three) flowrates such as 3.6; 6.5 and 14.3 L/min respectively. In the low flowrate, the temperature of outlet water is approximately 37 °C. However, the compressor power is also increase significantly. The coefficient of performances (COPs) of the system in average are 2.9 in the low flowrate and 3.4 in the high flowrate. Also. the result shows that the utilization of GSCS is appropriated for cooling buildings in the hot climate like Indonesia.

Analysis of Liquid Sloshing in an In-Containment Refueling Water Storage Tank for AP1000

2013 ◽  
Author(s):  
Yu Liu ◽  
Daogang Lu ◽  
Junjie Dang ◽  
Licun Wu ◽  
Wenhui Ma
Keyword(s):  
Storage Tank ◽  
Nuclear Power ◽  
Cooling System ◽  
Water Storage ◽  
Sine Wave ◽  
Liquid Sloshing ◽  
Normal Operation ◽  
Water Storage Tank ◽  
Core Cooling ◽  
Residual Heat

Although much work has been performed on the liquid sloshing inside simple structures like rectangular and cylindrical vessels, this paper deals with the analysis of the liquid sloshing in a more complex structures, the in-containment refueling water storage tank (IRWST). The IRWST is an important component of AP1000 passive core cooling system to ensure the safe operation of the AP1000 nuclear power plant. In postulated non-LOCA events, the water in the IRWST absorbs the residual heat then transfers the heat into the containment atmosphere. However, in the case of earthquake, the sloshing fluid may influence the safety of the appropriate semi-cylindrical IRWST. In this paper, the liquid transient response in the IRWST was formulated based on finite element modal analysis when the three resonance sine wave was applied as excitation. The result shows that the maximum wave excited by excitation from different directions always emerges from the corner or the edge of tank. Another finding is that water will not overflow at the normal operational water level when exited by the selected excitations in any directions. The safety of the IRWST’s roof is achieved which guarantees that the water vapor and radioactive gases within the tank during normal operation will not release to atmosphere in the containment. The influence of the excitation direction and the water depth are also analyzed.

Performance of Chiller in a Solar Absorption Air Conditioning System With Partitioned Hot Water Storage Tank

2000 ◽  
Vol 123 (1) ◽  
pp. 48-50 ◽  
Author(s):  
Z. F. Li ◽  
K. Sumathy
Keyword(s):  
Storage Tank ◽  
Air Conditioning ◽  
Lithium Bromide ◽  
Hot Water ◽  
Solar Absorption ◽  
Air Conditioning System ◽  
Water Storage Tank ◽  
Solar Cooling ◽  
Solar Powered ◽  
System Designs

This paper reports the performance of a lithium bromide absorption chiller in a solar powered air conditioning system, when being operated conventionally. The chiller performance based on a modified solar powered absorption air conditioning system which is integrated with a partitioned storage tank has been presented and discussed. It is shown that, by partitioning the storage tank, the chiller performance is not significantly affected, and the solar powered cooling effect can be realized much earlier, achieving a higher total solar cooling COPsystem, compared to the conventional system designs.

Performance of an autonomous solar powered absorption air conditioning system

2015 ◽  
Vol 26 (1) ◽  
pp. 106-112
Author(s):  
Tatenda J. Bvumbe ◽  
Freddie L. Inambao
Keyword(s):  
System Performance ◽  
Air Conditioning ◽  
Cold Water ◽  
Cooling System ◽  
Water Storage ◽  
Performance Data ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Water Storage Tank ◽  
Average Value

The demand for air conditioning is increasing due to changing architectural trends and increased standards of living and indoor comfort conditions. Coupled to this, refrigerants used in conventional refrigeration systems have detrimental effects on the environment. As a result, there is an urgent need to implement environmentally cleaner ways of satisfying this air-conditioning demand. Absorption cooling systems have shown great potential to do so. In this study, system performance data for an autonomous solar heating and cooling system installed at the Vodafone Site System Innovation Centre, at the Vodacom Campus in Midrand was collected and analysed. The system comprises a 116 m2 vacuum tube collector array, a 6.5 m3 hot water storage tank, a 35 kW LiBr-Water absorption chiller, 1 m3 of cold water storage, a dry cooler for the chiller, and two underground thermal stores to pre-cool the supply air to the building and the dry cooler respectively. System performance data was collected from the beginning of December 2011 to the end of January 2012 and used to estimate the system long term performance. The chiller has an average coefficient of performance (COP) of 0.51 whilst the solar COP has an average value of 0.24. The total installation cost is R2 822 436.89, with an annuity of R225 949.75 and a cost per kWh of R28.88.

Sign in / Sign up

Export Citation Format

Share Document