Modeling of an Air Conditioning System with Geothermal Heat Pump for a Residential Building

Cocchi, Silvia; Castellucci, Sonia; Tucci, Andrea

doi:10.1155/2013/781231

Cited by 21 publications

(8 citation statements)

References 14 publications

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“…A transient simulation model is developed using Transient Systems Simulation (TRNSYS) software, employing Typical Meteorological Year (TMY) weather data for Abu Dhabi to predict energy performance for the proposed renewable energy systems [31]. TRNSYS simulation program has been widely used in literature, and has been proven as an effective program for simulating geothermal systems [32][33][34], absorption cooling [35][36][37] and photovoltaic systems [38][39][40]. A dynamic model that couples the solar cooling system with the building was developed in TRNSYS to assess its performance in an office building in Tunisia [41].…”

Section: Methodsmentioning

confidence: 99%

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

2018

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Similar to many fast growing countries, the United Arab Emirates (UAE) witnessed fast population and urbanization growth. The building sector accounts for a major share of its electricity consumption, reaching up to 70%. To encourage sustainable development and reduce energy consumption and emissions, the government introduced a sustainability initiative called “Estidama”, which employs the use of the Pearl Building Rating System (PBRS). Government buildings, which constitute 20% of the built environment, aim to lead the way, and are therefore required to attain a high level of achievement, based on their PBRS ranking (minimum of two out of five pearls). Schools, led by Abu Dhabi Educational Council (ADEC), are governmental buildings and aim to attain a higher level of achievement (three out of five pearls). The ADEC plans to build one hundred schools to be built by 2020, through its Future Schools Program. Over half of the schools have been completed, but only 20% reached the targeted rating (of three out of five pearls). The Renewable Energy (RE) application in the UAE is minimal, although it represents 25% of the local rating code. The objective of this paper is to explore the sustainable performance of one representative school that did not reach the desired green rating level, with the objective to assess opportunities for an enhanced performance. This is done through testing the performance and the application of three RE systems comprising of photovoltaics (PV) array, an absorption cooling system and a geothermal cooling system through Transient Systems Simulation (TRNSYS) software. Cumulatively, implementation of these options results in RE potentially contributing to 19% of the school’s annual energy consumption, enhancing the school’s performance by up to 14 additional credit points, and reaching the target level of achievement (a three pearl rating). Furthermore, system integration of RE into the existing school were also considered. Results indicate the significant potential of integrating RE systems in future schools in hot climatic contexts, for an improved energy performance.

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Section: Methodsmentioning

confidence: 99%

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

2018

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“…[ 45 ] The maximum reported current densities reach 10 2 A cm 2 for the temperatures ranging from 1100 to 1900 °C. More realistic current densities of 10 A cm 2 range from 900 to 1600 °C. The anode (W, ϕ wH = 4.5 eV) demonstrates the current densities of several orders of magnitude lower: 10 −3 A cm 2 at 1800 °C and 10 −1 A cm 2 at 2200 °C.…”

Section: Electronic Propertiesmentioning

confidence: 99%

“…[ 1,2 ] The heat pumps feature the two very important capabilities: fi rst, the amount of heat energy transferred between the cool and hot sides of the pump can signifi cantly exceed the thermodynamic cycle-based technique, and new concepts should be proposed. [ 30 ] The fi rst step into the above defi ned direction was done when the solid-state active heat pumps based on a Peltier-Seebeck effect were proposed.…”

Section: Introductionmentioning

confidence: 99%

Nanoscaled Metamaterial as an Advanced Heat Pump and Cooling Media

Levchenko

Beilis

Keidar

2016

Adv Materials Technologies

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(1 of 10) 1600008 wileyonlinelibrary.com amount of energy spent from the external source, [3][4][5] and hence, the heat pumps are much more effi cient than the simple heating devices. The second important feature of the heat pump is the ability to lower the temperature of the cooler body by transferring the heat to a warmer side, i.e., in the direction opposite to the spontaneous heat fl ow. These two features determine the use of heat pumps, and specify the potential niche for their applications on the future techniques.The most conventional heat pumps are based on the thermodynamic cycle involving compression and expansion of the gaseous working medium. Such devices are essentially large complex technical systems consisting of several sub-systems such as electrical motors, compressors, expanders, heat exchangers, etc. They are currently used for various applications ranging from the higheffi cient heating and cooling household premises [ 6,7 ] and industrial buildings [ 8,9 ] to agriculture, [ 10 ] food industry, [ 11 ] and space technology. [ 12,13 ] Other types of heattransfer systems such as adsorption, [ 14 ] molecular, [ 15 ] and chemical [ 16 ] heat pumps also demonstrate high cost and limited effi ciency, especially at nanoscale. For example, the thermoelectric microrefrigerators [ 17 ] can allow the cooling by several Kelvins at the power density of about 100 W cm −2 , and only 1 K at 400 W cm −2 . [ 18 ] It is expected that the rate of heat pumps in the private and industrial heat and cooling systems will reach 30% by 2050. [ 19 ] The main problem retarding the wide application of heat pumps for heating is the complicity and large size, and hence, the high cost and long payout period. [ 20 ] Besides, the compression-based systems cannot operate at high temperatures. These features also impede the application of heat pumps in the miniaturized devices which are of a great importance now, such as electronics, semiconductor-based energy transforming devices, [ 21 ] advanced solar cell systems, [ 22 ] nanomechanical systems, [ 23 ] miniaturized unmanned fl ying vehicles, cubesats, [24][25][26] and other small-sized spacecraft and their power systems. [ 27 ] Some of these problems can be overcome by creating materials displaying properties that do not exist in nature, i.e., metamaterials, [ 28 ] i.e., the "transition from the compression-based system to a material-based form-factor" should be achieved. [ 29 ] Apparently, this is not possible in the framework of the obsolete Nanoscaled Metamaterial as an Advanced Heat Pump and Cooling MediaIgor Levchenko ,* Isak I. Beilis , and Michael Keidar Major characteristics of the nanoscaled high-temperature metamaterial capable of reversal heat transmission are calculated, and two design variants are proposed and discussed. Specifi cally, the basic design has been proposed involving the solid-state highly emissive cathode material, and the modifi cation with a liquid-state emissive material (e.g., cesium) fi lling the nanoporous structure such as previously synthesize...

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“…Cocchi et al [93] presented a model in order to simulate an air conditioning system integrated with GSHP system. TRNSYS 17 software was used in order to refine the sizing.…”

Section: Modeling Of Gshp Systemsmentioning

confidence: 99%

“…Significant energy could be saved through multiple vertical heat exchangers in series [93]. Center distance Larger center distance (i.e.…”

Section: Parameters Important Observationsmentioning

confidence: 99%

Ground coupled heat exchangers: A review and applications

Soni

Pandey

Bartaria³

2015

Renewable and Sustainable Energy Reviews

160

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Modeling of an Air Conditioning System with Geothermal Heat Pump for a Residential Building

Cited by 21 publications

References 14 publications

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

Enhancing Green Building Rating of a School under the Hot Climate of UAE; Renewable Energy Application and System Integration

Nanoscaled Metamaterial as an Advanced Heat Pump and Cooling Media

Ground coupled heat exchangers: A review and applications

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