Performance of a gas engine driven heat pump for hot water supply systems

Elgendy, E.; Schmidt, Jürgen; Khalil, A.; Fatouh, M.

doi:10.1016/j.energy.2011.02.030

Cited by 40 publications

(18 citation statements)

References 10 publications

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“…The change trend of PER with gas engine speed is in accordance with Ref. [8]. When the evaporative condenser air velocity increased from 2.2 m/s to 3.9 m/s, the change trend of gas engine energy consumption was decreased, while the change trend of cooling capacity was increased.…”

Section: Influence Of Ambient Air Temperature and Gas Engine Speedssupporting

confidence: 79%

“…The results showed that the varied tendency of total heating capacity and primary energy ratio decreased with the increasing of condenser temperature, while gas engine energy consumption increased with the increasing of condenser temperature. PER decreased by 15.3% under the condition of the engine speed varied from 1300 to 1750 rpm [8]. Furthermore, the cooling performance of a gas engine heat pump system with the important factors, such as, evaporator water inlet temperature, evaporator water volume flow rate, ambient air temperature and gas engine speeds, were also investigated [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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Section: Influence Of Ambient Air Temperature and Gas Engine Speedssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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“…Therefore, GEHPs perform better than EHPs, especially in heating mode. [27,28] Due to the lower price of natural gas in comparison with electricity and the greater energy savings, GEHPs are a subject of interest in modern commercial and industrial applications. The operating cost of the GEHP system is less than that of an electric-driven system because the average cost per equivalent unit of energy for natural gas is lower than that of electricity.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic (Thermoeconomic) Analysis and Performance Assessment of a Gas Engine–Driven Heat Pump Drying System Based on Experimental Data

2012

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Exergoeconomic analysis has been used as a powerful tool to study and optimize various types of energy-related systems. In this study, we use the specific exergy cost (SPECO) method to calculate exergy-related parameters and display cost flows for all streams and components in a gas engine-driven heat pump drying system based on the experimental data. We analyze and evaluate the performance of the drying system components and the drying process for three different medicinal and aromatic plants from an exergoeconomic point of view. We also investigate the effect of varying dead (reference) state temperatures on exergoeconomic performance parameters for the drying system components and drying process. Although the condenser and drying chamber of the gas enginedriven heat pump dryer were significantly affected by the ambient temperature, the gas engine was slightly influenced by the ambient temperature. At low ambient temperatures, the exergy rates increased and the most effective performance obtained from this dryer was at 0 C. The performance of the drying process also increased at low ambient temperatures. This study demonstrated that exergoeconomic analysis can provide more information than exergy analysis, and the results obtained from the exergoeconomic analysis provided cost-based information, suggesting potential locations for drying system improvement.

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“…As reviewed by ELGENDY et al (2011), increasing combustion engine rotation, for heat pump driving, from 1,300 to 1,750 rpm, caused a 17% increase in recovered heat for water warming. In contrast, it also caused a 39% increase in gas consumption, reducing by 15% the COP, called primary energy ratio (PER) by these authors.…”

Section: Rossa and Bazzomentioning

confidence: 99%

“…ELGENDY et al (2011) andYANG et al (2013) observed a primary energy ratio (PER) greater than 1.1, using air-water heat pumps driven by water-cooled gas engines, recovering heat lost from the engine block and from flue gases.…”

Section: Rossa and Bazzomentioning

confidence: 99%

Heat pump for thermal power production in dairy farm

et al. 2016

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Besides cold for milk cooling, dairy facilities need to produce hot water for cleaning of tools and equipment. Overall, ohmic heating has been used in dairy farms, increasing power consumption and manufacturing costs. Therefore, as an alternative to reduce power consumption, this paper proposed a water-water heat pumping for simultaneous cold and heat generations. Accordingly, operational tests were performed with three heat-pump prototypes designed for dairy farms, in both laboratory and field levels. At laboratory, tests were carried out using electricity and CNG to define a coefficient of performance (COP). Biogas tests were performed in the field to measure its consumption. CNG average consumption was of 1.118 m 3 / h, while biogas consume was of 2.02 m 3 / h. COP averages of CNG driven pump were 0.20 for cooling, 0.39 for heating, and 0.59 for global. For electric-power driving, COP values were 1.75 for cooling, 2.25 for heating, and 4.00 for global. In addition to evaporating and compensating temperatures, engine rotation was one factor of influence on heat-pump performance.

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Performance of a gas engine driven heat pump for hot water supply systems

Cited by 40 publications

References 10 publications

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Exergoeconomic (Thermoeconomic) Analysis and Performance Assessment of a Gas Engine–Driven Heat Pump Drying System Based on Experimental Data

Heat pump for thermal power production in dairy farm

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