The Experts below are selected from a list of 20835 Experts worldwide ranked by ideXlab platform
Anthony C Gehl - One of the best experts on this subject based on the ideXlab platform.
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exergy analysis of a two stage Ground source heat pump with a vertical bore for residential space conditioning under simulated occupancy
Applied Energy, 2015Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This twelve-month field study analyzes the performance of a 7.56 W (2.16-ton) water-to-air-Ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the Ground as a source of renewable energy is clearly demonstrated. Better than 75% of the energy needed for space heating was extracted from the Ground. The average monthly electricity consumption for space conditioning was only 40 kW h at summer and winter thermostat set points of 24.4 °C and 21.7 °C, respectively. The WA-GSHP shared the same 94.5 m vertical bore Ground Loop with a separate water-to-water Ground-source heat pump (WW-GSHP) for meeting domestic hot water needs in the same house. Sources of systemic irreversibility, the main cause of lost work, are identified using Exergy and energy analysis. Quantifying the sources of Exergy and energy losses is essential for further systemic improvements. The research findings suggest that the WA-GSHPs are a practical and viable technology to reduce primary energy consumption and greenhouse gas emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 targets of using renewable energy resources.
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exergy and energy analysis of a Ground source heat pump for domestic water heating under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2013Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents analysis of a 5.275 kW (1.5-ton) water-to-water Ground source heat pump (WW-GSHP) satisfying hot water needs in a 345 m 2 research house operated under simulated occupancy conditions. The hot water use protocol from the Building America Research Benchmark Definition claims to capture the living habits of the average American household and its impact on energy consumption. Energy and exergy analyses provide insight on system efficiency and sources of irreversibility, the main cause of wasted energy. The WW-GSHP shared the Ground Loop with a 7.56 kW water to air Ground source heat pump (WA-GSHP) to space condition the same house. Understanding the performance of GSHPs is vital if the Ground is to be used as a viable renewable energy resource.
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exergy analysis and operational efficiency of a horizontal Ground source heat pump system operated in a low energy test house under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2012Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents data, analyses, measures of performance, and conclusions for a Ground-source heat pump (GSHP) providing space conditioning to a 345 m 2 house whose envelope is made of structural insulated panels. The entire house thermal load with R SI -3.7 (R US -21) walls, triple-pane windows (U-factor of 1.64 W m −2 K (0.29 Btu h −1 ft −2 °F −1 )) and solar heat gain coefficient of 0.25, a roof assembly with overall thermal resistance of about R SI -8.8 (R US -50), and low leakage rates of 0.74 ACH at 50 Pa, was satisfied with a 2.16 ton (7.56 kW) GSHP unit. Coefficient of performance is calculated on the basis of the total power input (including duct, Ground Loop, and control power losses). Exergy analysis provides a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work — the root cause of system inefficiencies and wasted energy.
Moonis Raza Ally - One of the best experts on this subject based on the ideXlab platform.
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exergy analysis of a two stage Ground source heat pump with a vertical bore for residential space conditioning under simulated occupancy
Applied Energy, 2015Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This twelve-month field study analyzes the performance of a 7.56 W (2.16-ton) water-to-air-Ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the Ground as a source of renewable energy is clearly demonstrated. Better than 75% of the energy needed for space heating was extracted from the Ground. The average monthly electricity consumption for space conditioning was only 40 kW h at summer and winter thermostat set points of 24.4 °C and 21.7 °C, respectively. The WA-GSHP shared the same 94.5 m vertical bore Ground Loop with a separate water-to-water Ground-source heat pump (WW-GSHP) for meeting domestic hot water needs in the same house. Sources of systemic irreversibility, the main cause of lost work, are identified using Exergy and energy analysis. Quantifying the sources of Exergy and energy losses is essential for further systemic improvements. The research findings suggest that the WA-GSHPs are a practical and viable technology to reduce primary energy consumption and greenhouse gas emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 targets of using renewable energy resources.
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exergy and energy analysis of a Ground source heat pump for domestic water heating under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2013Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents analysis of a 5.275 kW (1.5-ton) water-to-water Ground source heat pump (WW-GSHP) satisfying hot water needs in a 345 m 2 research house operated under simulated occupancy conditions. The hot water use protocol from the Building America Research Benchmark Definition claims to capture the living habits of the average American household and its impact on energy consumption. Energy and exergy analyses provide insight on system efficiency and sources of irreversibility, the main cause of wasted energy. The WW-GSHP shared the Ground Loop with a 7.56 kW water to air Ground source heat pump (WA-GSHP) to space condition the same house. Understanding the performance of GSHPs is vital if the Ground is to be used as a viable renewable energy resource.
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exergy analysis and operational efficiency of a horizontal Ground source heat pump system operated in a low energy test house under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2012Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents data, analyses, measures of performance, and conclusions for a Ground-source heat pump (GSHP) providing space conditioning to a 345 m 2 house whose envelope is made of structural insulated panels. The entire house thermal load with R SI -3.7 (R US -21) walls, triple-pane windows (U-factor of 1.64 W m −2 K (0.29 Btu h −1 ft −2 °F −1 )) and solar heat gain coefficient of 0.25, a roof assembly with overall thermal resistance of about R SI -8.8 (R US -50), and low leakage rates of 0.74 ACH at 50 Pa, was satisfied with a 2.16 ton (7.56 kW) GSHP unit. Coefficient of performance is calculated on the basis of the total power input (including duct, Ground Loop, and control power losses). Exergy analysis provides a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work — the root cause of system inefficiencies and wasted energy.
Jeffrey D Munk - One of the best experts on this subject based on the ideXlab platform.
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exergy analysis of a two stage Ground source heat pump with a vertical bore for residential space conditioning under simulated occupancy
Applied Energy, 2015Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This twelve-month field study analyzes the performance of a 7.56 W (2.16-ton) water-to-air-Ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the Ground as a source of renewable energy is clearly demonstrated. Better than 75% of the energy needed for space heating was extracted from the Ground. The average monthly electricity consumption for space conditioning was only 40 kW h at summer and winter thermostat set points of 24.4 °C and 21.7 °C, respectively. The WA-GSHP shared the same 94.5 m vertical bore Ground Loop with a separate water-to-water Ground-source heat pump (WW-GSHP) for meeting domestic hot water needs in the same house. Sources of systemic irreversibility, the main cause of lost work, are identified using Exergy and energy analysis. Quantifying the sources of Exergy and energy losses is essential for further systemic improvements. The research findings suggest that the WA-GSHPs are a practical and viable technology to reduce primary energy consumption and greenhouse gas emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 targets of using renewable energy resources.
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exergy and energy analysis of a Ground source heat pump for domestic water heating under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2013Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents analysis of a 5.275 kW (1.5-ton) water-to-water Ground source heat pump (WW-GSHP) satisfying hot water needs in a 345 m 2 research house operated under simulated occupancy conditions. The hot water use protocol from the Building America Research Benchmark Definition claims to capture the living habits of the average American household and its impact on energy consumption. Energy and exergy analyses provide insight on system efficiency and sources of irreversibility, the main cause of wasted energy. The WW-GSHP shared the Ground Loop with a 7.56 kW water to air Ground source heat pump (WA-GSHP) to space condition the same house. Understanding the performance of GSHPs is vital if the Ground is to be used as a viable renewable energy resource.
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exergy analysis and operational efficiency of a horizontal Ground source heat pump system operated in a low energy test house under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2012Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents data, analyses, measures of performance, and conclusions for a Ground-source heat pump (GSHP) providing space conditioning to a 345 m 2 house whose envelope is made of structural insulated panels. The entire house thermal load with R SI -3.7 (R US -21) walls, triple-pane windows (U-factor of 1.64 W m −2 K (0.29 Btu h −1 ft −2 °F −1 )) and solar heat gain coefficient of 0.25, a roof assembly with overall thermal resistance of about R SI -8.8 (R US -50), and low leakage rates of 0.74 ACH at 50 Pa, was satisfied with a 2.16 ton (7.56 kW) GSHP unit. Coefficient of performance is calculated on the basis of the total power input (including duct, Ground Loop, and control power losses). Exergy analysis provides a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work — the root cause of system inefficiencies and wasted energy.
Van D Baxter - One of the best experts on this subject based on the ideXlab platform.
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exergy analysis of a two stage Ground source heat pump with a vertical bore for residential space conditioning under simulated occupancy
Applied Energy, 2015Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This twelve-month field study analyzes the performance of a 7.56 W (2.16-ton) water-to-air-Ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the Ground as a source of renewable energy is clearly demonstrated. Better than 75% of the energy needed for space heating was extracted from the Ground. The average monthly electricity consumption for space conditioning was only 40 kW h at summer and winter thermostat set points of 24.4 °C and 21.7 °C, respectively. The WA-GSHP shared the same 94.5 m vertical bore Ground Loop with a separate water-to-water Ground-source heat pump (WW-GSHP) for meeting domestic hot water needs in the same house. Sources of systemic irreversibility, the main cause of lost work, are identified using Exergy and energy analysis. Quantifying the sources of Exergy and energy losses is essential for further systemic improvements. The research findings suggest that the WA-GSHPs are a practical and viable technology to reduce primary energy consumption and greenhouse gas emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 targets of using renewable energy resources.
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exergy and energy analysis of a Ground source heat pump for domestic water heating under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2013Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents analysis of a 5.275 kW (1.5-ton) water-to-water Ground source heat pump (WW-GSHP) satisfying hot water needs in a 345 m 2 research house operated under simulated occupancy conditions. The hot water use protocol from the Building America Research Benchmark Definition claims to capture the living habits of the average American household and its impact on energy consumption. Energy and exergy analyses provide insight on system efficiency and sources of irreversibility, the main cause of wasted energy. The WW-GSHP shared the Ground Loop with a 7.56 kW water to air Ground source heat pump (WA-GSHP) to space condition the same house. Understanding the performance of GSHPs is vital if the Ground is to be used as a viable renewable energy resource.
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exergy analysis and operational efficiency of a horizontal Ground source heat pump system operated in a low energy test house under simulated occupancy conditions
International Journal of Refrigeration-revue Internationale Du Froid, 2012Co-Authors: Moonis Raza Ally, Jeffrey D Munk, Van D Baxter, Anthony C GehlAbstract:Abstract This paper presents data, analyses, measures of performance, and conclusions for a Ground-source heat pump (GSHP) providing space conditioning to a 345 m 2 house whose envelope is made of structural insulated panels. The entire house thermal load with R SI -3.7 (R US -21) walls, triple-pane windows (U-factor of 1.64 W m −2 K (0.29 Btu h −1 ft −2 °F −1 )) and solar heat gain coefficient of 0.25, a roof assembly with overall thermal resistance of about R SI -8.8 (R US -50), and low leakage rates of 0.74 ACH at 50 Pa, was satisfied with a 2.16 ton (7.56 kW) GSHP unit. Coefficient of performance is calculated on the basis of the total power input (including duct, Ground Loop, and control power losses). Exergy analysis provides a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work — the root cause of system inefficiencies and wasted energy.
Philippe Pasquier - One of the best experts on this subject based on the ideXlab platform.
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the effect of borehole inclination on fluid and Ground temperature for glhe systems
Geothermics, 2009Co-Authors: Denis Marcotte, Philippe PasquierAbstract:The effect of borehole inclination on Ground temperatures and the practical implications it has for the designs of Ground-Loop heat exchangers (GLHE) systems is studied. We present a general formulation allowing computation of Ground temperature for any number of boreholes, each borehole having its own thermal load, dip, direction, depth (of its head) and length. It is shown with an actual design that a slight tilt of the boreholes can substantially improve the theoretical performance of the GLHE.
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fast fluid and Ground temperature computation for geothermal Ground Loop heat exchanger systems
Geothermics, 2008Co-Authors: Denis Marcotte, Philippe PasquierAbstract:Heat pumps (HPs) coupled to Ground-Loop heat exchangers (GLHEs) have become increasingly popular for heating and cooling purposes in the context of growing energy costs. Precise design of GLHEs requires the computation of hourly fluid and Ground temperatures, especially when the geothermal system is coupled to another system (e.g. boiler, cooling tower). However, because of the computational burden, hourly computation is often simplified in actual designs by rules of thumb or approximations that can cause over- or under-design of the GLHE system. The hourly temperature computation can be seen as a convolution in the time domain that is most efficiently evaluated by fast Fourier transform (FFT). An additional substantial reduction in computing time is obtained by subsampling the analytical function at a few selected times according to a geometric sequence and then using a good quality interpolant such as the cubic spline. This combined “FFT-S approach” enables one to obtain a 30-year hourly simulation in less than a second on a standard laptop computer, even for the computationally intensive finite line-source model. This reduction of one to two orders of magnitude in computing time compared to time-domain approaches with load aggregation should help promote the use of hourly temperature simulation for GLHE design purposes.
