Coefficient of performance and heating and cooling thermal performance characteristics using a standing column well and cross-mixing balancing well heat exchanger methods

Lim, Kyoung-Bin; Lee, Changhee

doi:10.1016/j.egyr.2021.03.001

Cited by 8 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature both experimental (Beaudry et al, 2019;Cho et al, 2016;Lee et al, 2019;Lim and Lee, 2021;Minea, 2013;Nguyen et al, 2020;Orio et al, 2005;Pasquier et al, 2016) and simulation studies (Beaudry et al, 2022(Beaudry et al, , 2021Nguyen et al, 2013) addressed the performance of GSHP systems using SCWs, some of which also explored different groundwater bleeding strategies (Beaudry et al, 2022;Nguyen et al, 2020Nguyen et al, , 2013.…”

Section: Standing Column Wells In Cold Climatesmentioning

confidence: 99%

Control strategy evaluation framework for ground source heat pumps using standing column wells

Tonellato¹,

Kummert²,

Candanedo³

et al. 2022

Proceedings of the IGSHPA Research Track 2022

View full text Add to dashboard Cite

Standing column wells (SCWs) are efficient ground heat exchangers (GHEs) that have a significant cost saving potential. Recent developments have shown that they can also adapt successfully to cold climates despite previous concerns about operating near the freezing point. Therefore, new research frontiers are now being explored as the integration of this type of GHE to a real case study building model has hardly been analyzed until now. An institutional building has been selected for a SCW demonstration project in Mirabel, Canada. This paper includes in one single model the building, the Heating Ventilation and Air Conditioning (HVAC) system and the SCWs. The objective is to develop a software framework to analyze the impact of building operation strategies on the entire system during winter. Peak loads revealed to be the most critical points to control as the groundwater can freeze if the heat extraction is too high. Night indoor air temperature setbacks can bring significantly high peak loads whenever the building is heated to be occupied during the day. This paper shows that, using a bleed ratio above 20 %, a night setback can be successfully operated ramping up the temperature in around 3 hours.

show abstract

Section: Standing Column Wells In Cold Climatesmentioning

confidence: 99%

Control strategy evaluation framework for ground source heat pumps using standing column wells

Tonellato¹,

Kummert²,

Candanedo³

et al. 2022

Proceedings of the IGSHPA Research Track 2022

View full text Add to dashboard Cite

show abstract

“…In the literature both experimental Cho et al, 2016;Lee et al, 2019;Lim and Lee, 2021;Minea, 2013;Orio et al, 2005; and simulation studies Nguyen et al, 2013) addressed the performance of GSHP systems using SCWs, some of which also explored different groundwater bleeding strategies Nguyen et al, , 2013.…”

Section: Standing Column Wells In Cold Climatesmentioning

confidence: 99%

Proceedings of the IGSHPA Research Track 2022

2022

View full text Add to dashboard Cite

This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doepublic-access-plan).

show abstract

“…The modified unit was tested under various ranges of ambient temperatures to compare with the traditional outdoor unit. The results showed that the modified unit reduced 2.2 o C temperature when the outdoor temperature was 35 o C. In addition, it enhanced the refrigerating capacity, power consumption, and energy efficiency ratio by 8.1%, -9.5%, and 20%, respectively at the ambient temperature of 43 o C. Lim & Lee [20] conducted an experimental investigation to improve the thermal performance characteristics of a proposed geothermal system using a standing column well (SCW) and cross-mixing balancing well heat exchanger methods. The analysis was done by preventing underground water discharge and maintaining a constant temperature of the underground heat exchanger.…”

Section: Introductionmentioning

confidence: 96%

Improving the Efficiency of a Conventional Vapor-Compression Refrigeration System used for Geothermal and Evaporative Cooling Techniques: Case Study in Iraq

Ismael

Yahya

Azhar³

et al. 2023

DJES

View full text Add to dashboard Cite

A conventional vapor compression refrigeration cycle is among the most effective technology in refrigeration systems. In the present experimental study, thermal performance and the effect of the condenser temperature have been analyzed. With the decrease in the condenser temperature, the overall performance of the refrigeration cycle is increased. However, the cooling power and efficiency of conventional vapor pressure air conditioning units can experience a significant reduction when operating in extreme weather (hot and dry). This drop is mainly affected by the increase in the temperature (and pressure) of the condenser with an increase in the ambient air temperature. Unfortunately, Iraq experiences the most extreme summer seasons especially in the months of June and July when the temperature reaches or exceeds 50° C. So, ground cooling has been used in areas with a hot environment for split system air conditioners. Evaporative cooling was also performed to lower the coolant temperature of the AC unit used inside the condenser area. Experimental results showed that when using a geothermal heat exchanger, the temperature of the condenser is reduced from 116 to 110 ° C and the coefficient of performance (COP) is improved by 41%. In addition to this when the system uses evaporative cooling the temperature of the condenser is reduced from 110 ° C to 88° C. Moreover, a 65% improvement was made in the COP of the conventional vapor compression refrigeration cycle. Furthermore, with a decrease in the evaporator temperature from 6 to 3.5 °C there was an increase in refrigeration capacity by an average of 52%.

show abstract

Coefficient of performance and heating and cooling thermal performance characteristics using a standing column well and cross-mixing balancing well heat exchanger methods

Cited by 8 publications

References 12 publications

Control strategy evaluation framework for ground source heat pumps using standing column wells

Control strategy evaluation framework for ground source heat pumps using standing column wells

Proceedings of the IGSHPA Research Track 2022

Improving the Efficiency of a Conventional Vapor-Compression Refrigeration System used for Geothermal and Evaporative Cooling Techniques: Case Study in Iraq

Contact Info

Product

Resources

About