Comparison of energy and exergy analysis of fossil plant, ground and air source heat pump building heating system

Lohani, Sunil Prasad; Schmidt, Dietrich

doi:10.1016/j.renene.2009.10.002

Cited by 101 publications

(36 citation statements)

References 4 publications

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“…Zhou and Gong [13] studied the whole chain of exergy flows for a building heating and cooling system by hourly varying the reference state. Balta et al [14], Lohani [15], and Lohani and Schmidt [16] studied different heat sources for building heating applications. Zmeureanu and Wu [17] studied the energy and exergy performance of residential heating systems.…”

Section: Introductionmentioning

confidence: 99%

Exergy performance of different space heating systems: A theoretical study

Kazanci

Shukuya

Olesen

2016

Building and Environment

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Three space heating systems (floor heating with different floor covering resistances, radiator heating with different working temperatures, warm-air heating with and without heat recovery) were compared using a natural gas fired condensing boiler as the heat source. For the floor heating systems, the effects of floor covering resistance on the whole system performance were studied using two heat sources; a natural gas fired condensing boiler and an air-source heat pump. The heating systems were also compared in terms of auxiliary exergy use for pumps and fans.The low temperature floor heating system performed better than other systems in terms of exergy demand. The use of boiler as a heat source for a low-exergy floor heating system creates a mismatch in the exergy supply and demand. Although an air-source heat pump could be a better heat source, this depends on the origin of the M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 electricity supplied to the heat pump. The coefficient of performance (COP) of the heat pump has a critical value (2.57 in this study); it is beneficial to use a heat pump instead of a boiler only when the COP is above this critical value.The floor covering resistance should be kept to a minimum, in order not to hinder the performance of the floor heating and the whole system. The exergy input to auxiliary components plays a significant role in the overall exergy performance of systems, and its effects become even more significant for low temperature heating systems.

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Section: Introductionmentioning

confidence: 99%

Exergy performance of different space heating systems: A theoretical study

Kazanci

Shukuya

Olesen

2016

Building and Environment

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“…In 2013, Self et al [5] compared GHP heating with other heating options, and found out that the use of GHP systems is economically advantageous if the local electricity price is low, which also has the lowest effect on the environment considering the low CO 2 emissions. An energy and exergy flow analysis was performed by Lohani and Schmidt [6] in 2010 considering different heating options, including fossil fuels, ground and air source heat pump systems. The result of this comparison revealed that the GHP heating system is better than air source heat pumps and other conventional heat options.…”

Section: Introductionmentioning

confidence: 99%

Recent Development and Application of Geothermal Heat Pump Systems in Cold-Climate Regions of the US: A Further Investigation

Yu¹,

Miao²,

Miller³

et al. 2017

ENG

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A Geothermal Heat Pump (GHP) system is known to have enormous potential for building energy savings and the reduction of associated greenhouse gas emissions, due to its high Coefficient Of Performance (COP). The use of a GHP system in cold-climate regions is more attractive owing to its higher COP for heating compared to conventional heating devices, such as furnaces or boilers. Many factors, however, determine the operational performance of an existing GHP system, such as control strategy, part/full-load efficiency, the age of the system, defective parts, and whether or not regular maintenance services are provided. The omitting of any of these factors in design and operation stages could have significant impacts on the normal operation of GHP systems. Therefore, the objectives of this paper are to further investigate and study the existing GHP systems currently used in buildings located in coldclimate regions of the US, in terms of system operational performance, potential energy and energy cost savings, system cost information, the reasons for installing geothermal systems, current operating difficulties, and owner satisfaction to date. After the comprehensive investigation and in-depth analysis of 24 buildings, the results indicate that for these buildings, about 75% of the building owners are very satisfied with their GHP systems in terms of noise, cost, and indoor comfort. About 71% of the investigated GHP systems have not had serious operating difficulties, and about 85% of the respondents (building owners) would suggest this type of system to other people. Compared to the national median of energy use and energy cost of typical buildings of the same type nationwide, the overall performance of the actual GHP systems used in the cold-climate regions is slightly better, i.e. 626energy savings and 6.1% energy cost savings on average.

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“…Previous studies on vertical closed systems focused mainly on (a) the comparison between these systems and other heat pump technologies such as air source heat pumps (e.g., Lohani and Schmit 2010;Urchueguía et al 2008;Petit and Meyer 1998;Said et al 2010;Liu and Hong 2010); (b) the energy, environmental, and techno-economic aspects of the conventional heating and cooling systems' substitution (e.g., Huchtemann and Müller 2012;Pardo and Thiel 2012;Boait et al 2011;Shonder and Hughes 2006;Rodríguez et al 2012); (c) the strategic design, controlling procedure, and the benefits of combined (e.g., Chen and Yang 2012;Xi et al 2011;Wang et al 2010;Pärisch et al 2014;Rad et al 2013) or hybrid systems (e.g., Pardo et al 2010;Man et al 2010;Yi et al 2008;Yu et al 2014;Alavy et al 2013), systems which combine GCHP and other RES (e.g., solar panels, PV panels) or conventional (e.g., oil-fired boiler) technology; and (d) the overall design procedure of vertical GCHP systems in order to improve the efficiency and minimize the installation and operation costs taking into account the GHEx configuration, the geophysical properties of the materials and soil, as well as the climate conditions of the installing area (e.g., Robert and Gosselin 2014;Alalaimi et al 2013;Chung and Choi 2012;Zanchini et al 2010;Sanaye and Niroomand 2009;Luo et al 2013). Urchueguía et al (2008), for example, compared a vertical GCHP system and an air to water heat pump system for heating and cooling in typical conditions of the European Mediterranean coast.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of ground source heat pump systems for residential buildings in warm Mediterranean regions: the example of Cyprus

et al. 2016

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This paper presents a feasibility analysis for the installation of ground source heat pump systems in Cyprus. Two reference buildings, a single-and a multifamily one, are designed and analyzed using the EnergyPlus software, in order to calculate their energy needs for heating and cooling for the climate conditions of Cyprus, one of the warmest areas in Southern Europe. These energy needs are assumed to be covered by the conventional heating and cooling systems that are most widely used in Cyprus or alternatively by a ground source heat pump system, which consists of a vertical ground heat exchanger and water-to-water heat pumps and is analyzed using an in-house developed and validated code. Primary energy consumption and the resulting CO 2 emissions for both the conventional and the alternative systems are calculated and compared. Results show that the installation of the ground source heat pump system achieves in most cases substantial reductions in primary energy use for both types of buildings. As regards carbon emissions, the findings are less clear:Emissions of the geothermal system are higher than those of the conventional system for the single-family building but considerably lower for the multi-family one. From an economic perspective, the geothermal system compares favorably with the conventional systems in many cases, particularly for the multi-family building.

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Comparison of energy and exergy analysis of fossil plant, ground and air source heat pump building heating system

Cited by 101 publications

References 4 publications

Exergy performance of different space heating systems: A theoretical study

Exergy performance of different space heating systems: A theoretical study

Recent Development and Application of Geothermal Heat Pump Systems in Cold-Climate Regions of the US: A Further Investigation

Evaluation of ground source heat pump systems for residential buildings in warm Mediterranean regions: the example of Cyprus

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