scholarly journals Modeling and Experimental Validation of a Transient Direct Expansion Heat Pump

2017 ◽  
Vol 6 (2) ◽  
pp. 145 ◽  
Author(s):  
Clément Rousseau ◽  
Jean-Louis Comlan Fannou ◽  
Louis Lamarche ◽  
Stanislaw Kajl
Keyword(s):  
Heat Pump ◽  
Experimental Validation ◽  
Heat Extraction ◽  
Direct Expansion ◽  
Geothermal Heat ◽  
Transient Model ◽  
Ground Source ◽  
Geothermal Heat Pump ◽  
Pump Modeling ◽  
Heating Mode

Geothermal heat pump technology is currently one of the most interesting technologies used to heat buildings. There are two designs used in the industry: geothermal heat pump using a secondary ground loop and Direct Expansion (DX) ground source heat pump. The latter is less used, possibly because less research has been carried out for the design of this kind of heat pump. In this paper, a transient model using the Comsol Multiphysic of a DX ground heat pump is presented in heating mode with R22, and a comparison with experimental results is presented with a 24-hour test. It is shown that the model was adequately validated by our experiment with only a maximum difference of 15%. Following this validation, a parametric analysis was realised on the geometry of the borehole. This study concluded that to have the best heat extraction of the ground, the pipes shank spacing need to be important without increasing the borehole diameter.Keywords: Direct Expansion geothermal heat pump, Modeling, R22Article History: Received January 16th 2017; Received in revised form May 28th 2017; Accepted June 6th 2017; Available onlineHow to Cite This Article: Rousseau, C., Fannou, J.L.C., Lamarche, L. and Kajl, S. (2017) Modeling and Experimental Validation of a Transient Direct Expansion Heat Pump. International Journal of Renewable Energy Develeopment, 6(2), 145-155.https://doi.org/10.14710/ijred.6.2.145-155

Development of a Fast Design Method for Direct Expansion Geothermal Heat Pump in Heating Mode

2015 ◽  
Author(s):  
Rousseau Clément ◽  
Jean-Louis Comlan Fannou ◽  
Louis Lamarche ◽  
Stanislaw Kajl ◽  
Mohamed Ouzzane
Keyword(s):  
Heat Pump ◽  
Design Method ◽  
Direct Expansion ◽  
Geothermal Heat ◽  
Geothermal Heat Pump ◽  
Heating Mode

Experimental analysis of a direct expansion geothermal heat pump in heating mode

2014 ◽  
Vol 75 ◽  
pp. 290-300 ◽  
Author(s):  
Jean-Louis Fannou ◽  
Clément Rousseau ◽  
Louis Lamarche ◽  
Kajl Stanislaw
Keyword(s):  
Heat Pump ◽  
Experimental Analysis ◽  
Direct Expansion ◽  
Geothermal Heat ◽  
Geothermal Heat Pump ◽  
Heating Mode

scholarly journals The thermal behavior of a novel wall radiator panel coupled with horizontal ground source heat pump heating system: improve indoor environment to reduce the airborne transmission of infectious diseases

2020 ◽  
Vol 5 ◽  
pp. 11
Author(s):  
Sabrin Korichi ◽  
Bachir Bouchekima ◽  
Nabiha Naili ◽  
Messaouda Azzouzi
Keyword(s):  
Infectious Diseases ◽  
Thermal Comfort ◽  
Heat Pump ◽  
Heating System ◽  
The Novel ◽  
Ground Source Heat Pump ◽  
Radiation Heating ◽  
Geothermal Heat ◽  
Ground Source ◽  
Geothermal Heat Pump

Motivated by the rapid spread of the novel pandemic disease (COVID-19) that swept the most countries in the world, a new radiation heating system consists of wall radiator panel system connected to a reversible geothermal heat pump (GHP) coupled with horizontal ground heat exchanger (HGHX) was proposed as fast and permanent solution to the risks of the dispersion of airborne infectious diseases in air-conditioned enclosed spaces. An experimental system was installed and tested in the laboratory of thermal process of Research and Technology Center of Energy (CRTEn), Tunisia, in order to achieve the two main goals of this work: developing a new radiation heating system with quick and inexpensive implementation while ensuring high efficiency and environment-friendly performance for the entire system. The results obtained show that it is feasible to use the novel RPHs as heat rejecter of the horizontal ground source heat pump system (HGSHPs) for heating buildings with limited surface land areas epically those located in the Mediterranean regions such as Tunisia, the average performance coefficients of the geothermal heat pump COPhp and the overall system COPsys are found to be 6.3 and 3, respectively. The thermal comfort analysis indicates that there is only a small vertical temperature fluctuation in the test room that would not produce any negative effect on thermal comfort.

Evaluation of a ground source geothermal heat pump to save energy and reduce CO 2 and noxious gas emissions in a pig house

2016 ◽  
Vol 111 ◽  
pp. 446-454 ◽  
Author(s):  
Md. Manirul Islam ◽  
Hong-Seok Mun ◽  
A. B. M. Rubayet Bostami ◽  
Sonia Tabasum Ahmed ◽  
Keum-Joo Park ◽  
...  
Keyword(s):  
Heat Pump ◽  
Geothermal Heat ◽  
Gas Emissions ◽  
Ground Source ◽  
Geothermal Heat Pump ◽  
Save Energy

Comparing the Energetic and Exergetic Performances of a Building Heated by Solar Energy and Ground-Source (Geothermal) Heat Pump

2011 ◽  
Vol 347-353 ◽  
pp. 1801-1805
Author(s):  
Arif Hepbasli ◽  
Mustafa Tolga Balta ◽  
Zeyad Alsuhaibani
Keyword(s):  
Heat Pump ◽  
Heating System ◽  
Building Envelope ◽  
Geothermal Heat ◽  
Pump System ◽  
Sustainability Index ◽  
Dead State ◽  
Ground Source ◽  
Energy And Exergy ◽  
Geothermal Heat Pump

In this study, we considered a building, which had a volume of 336 m3 and a floor area of 120 m2, with indoor and outdoor air temperatures of 20 oC and 0 oC, respectively. For heating this building, we selected two options, namely (i) a ground-source (geothermal) heat pump system (Case 1), and (ii) a solar collector heating system (Case 2). We employed both energy and exergy analysis methods to assess their performances and compare them through energy and exergy efficiencies and sustainability index. We also investigated energy and exergy flows for this building and illustrated from the primary energy transformation through the heat production system and a distribution system to a heating system, and from there, via the indoor air, across the building envelope to the surrounding air. We calculated that the total exergy efficiencies for Cases 1 and 2 were 4.7%, and 26.1% while sustainability index values for both cases were 1.049 and 1.353 at a reference (dead) state temperature of 0 oC, respectively.

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

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Silvia Cocchi ◽  
Sonia Castellucci ◽  
Andrea Tucci
Keyword(s):  
Heat Pump ◽  
Air Conditioning ◽  
Residential Building ◽  
Heat Pumps ◽  
Geothermal Heat ◽  
Air Conditioning System ◽  
Heating And Cooling ◽  
Ground Source ◽  
Geothermal Heat Pump ◽  
Geothermal Plant

The need to address climate change caused by greenhouse gas emissions attaches great importance to research aimed at using renewable energy. Geothermal energy is an interesting alternative concerning the production of energy for air conditioning of buildings (heating and cooling), through the use of geothermal heat pumps. In this work a model has been developed in order to simulate an air conditioning system with geothermal heat pump. A ground source heat pump (GSHP) uses the shallow ground as a source of heat, thus taking advantage of its seasonally moderate temperatures. GSHP must be coupled with geothermal exchangers. The model leads to design optimization of geothermal heat exchangers and to verify the operation of the geothermal plant.

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