Control strategy of a novel dry air ground source (DAGS) system

Conference paper

Yebiyo, M, Paurine, A and Maidment, GG (2018). Control strategy of a novel dry air ground source (DAGS) system. CIBSE Technical Symposium 2018, Stretching the Envelop. London 12 - 13 Apr 2018 CIBSE.
AuthorsYebiyo, M, Paurine, A and Maidment, GG
TypeConference paper
Abstract

Based on a number of studies carried out; it has been identified that Ground Source Heat Pump (GSHP) systems are widely used as one of the preferred low carbon technologies in the UK. The use of these systems is due to their economic advantages and potential reduction of carbon footprint. However, a number of the studies have highlighted that the systems are either installed incorrectly or operated and controlled improperly and therefore result in poor performance. GSHP performance is affected by the temperature of the ground and when thermally saturated its efficiency reduces significantly. This paper investigates the potential to reduce the level of thermal saturation by rejecting heat via a Dry Air Cooler (DAC) when the ground and ambient temperatures favour this. DACs are often fitted to GSHP systems to reject heat during extreme conditions to protect the system, rather than improve performance. In this investigation, an empirical Transient System Simulation (TRNSYS) model has been developed and used to investigate the control algorithms so as to identify the optimal operation and control strategies for DAGS system for enhancing the system efficiency. Specifically, the paper investigates the effect of using a DAC in conjunction with a GSHP system. This includes investigating the (i) energy input into the GSHP system, (ii) ground temperatures and (iii) Coefficient of Performance (COP). The results show significant savings can be achieved.

KeywordsGSHP
Year2018
PublisherCIBSE
Accepted author manuscript
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File Access Level
Open
Publication dates
Print12 Apr 2018
Publication process dates
Deposited28 Apr 2018
Accepted02 Feb 2018
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Yebiyo, M and Maidment, GG (2016). Magnetic Attraction. CIBSE journal. 201602, pp. 46-47.
Evaluation of Supermarket Energy Use and Emissions with Various Technology Options
Evans, J, Ge, YT, Tassou, SA, Foster, A and Maidment, GG (2016). Evaluation of Supermarket Energy Use and Emissions with Various Technology Options. Proceedings of IOR. Solihul 03 Mar 2016
Modelling and Evaluation of Supermarket Energy Use and Emissions
Maidment, GG (2016). Modelling and Evaluation of Supermarket Energy Use and Emissions. Proceedings of the Institute of Refrigeration.
Supermarket energy use and greenhouse gas emissions – technology options review
Evans, JA, Maidment, GG, Brown, T, Hammond, E and Foster, A (2016). Supermarket energy use and greenhouse gas emissions – technology options review. Proceedings of the Institute of Refrigeration. London 03 Mar 2016
UK Centre for Efficient and Renewable Energy in Buildings (CEREB)- Lessons Learned After 5 Years of Running
Yebiyo, M, Chaer, I, Shatha, H, Ye, Z and Dunn, A (2016). UK Centre for Efficient and Renewable Energy in Buildings (CEREB)- Lessons Learned After 5 Years of Running. 9th International Conference on Thermal Engineering: Theory and Applications. Abu Dhabi, UAE 24 - 26 Mar 2016 London South Bank University.
Alternative Heat Transfer Fluid in Heating Systems-Energy Results from a Real Case Study
Yebiyo, M, Chaer, I, Shatha, H, Ye, Z, Peter, S and Kadir, D (2016). Alternative Heat Transfer Fluid in Heating Systems-Energy Results from a Real Case Study. 9th International Conference on Thermal Engineering: Theory and Applications. Abu Dhabi, UAE 24 - 26 Mar 2016
An investigation of Cooling Unit Performance on the London Underground Railway Network
Maidment, GG (2016). An investigation of Cooling Unit Performance on the London Underground Railway Network. CIBSE technical symposium. Edinburgh 13 - 15 Apr 2016 CIBSE.
Carbon reduction opportunities for supermarkets
Evans, JA, Maidment, GG, Brown, T, Hammond, E and Foster, A (2016). Carbon reduction opportunities for supermarkets. 4th IIR International Conference on Sustainability and the Cold Chain. Auckland, New Zealand 07 - 09 Apr 2016 IIR. https://doi.org/10.18462/iir.iccc.2016.0042
Optimisation Of Inter-Seasonal Ground Source Heat Pumps With Predictive Behavioural Control
Yebiyo, M (2016). Optimisation Of Inter-Seasonal Ground Source Heat Pumps With Predictive Behavioural Control. PhD Thesis London South Bank University School of the Built Environment and Architecture https://doi.org/10.18744/PUB.001818
The Value of hybrid heat pumps
Yebiyo, M and Maidment, GG (2016). The Value of hybrid heat pumps. CIBSE journal. 2016 (Aug).
Large scale cooling using mains water
Davies, G., Maidment, GG, Paurine, A, Rutter, P, Evans, T and Tozer, R (2016). Large scale cooling using mains water. 12th Institute of Refrigeration Gustav Lorentzen Natural Working Fluids Conference. Edinburgh, UK 21 - 24 Aug 2016
Simulation of the heat recovery use of R744 systems in a supermarket
Colombo, I, Maidment, GG, Chaer, I and Paurine, A (2016). Simulation of the heat recovery use of R744 systems in a supermarket. 12th IIR Gustav Lorentzen Natural Working Fluids Conference. Edinburgh, UK 21 - 24 Aug 2016 IIR. https://doi.org/10.18462/iir.gl.2016.1180
Solar assisted heat pumps
Godbold, R, Paurine, A and Maidment, GG (2016). Solar assisted heat pumps. 12th Gustav Lorentzen Natural Working Fluids conference. Edinburgh 20 - 22 Aug 2016
Carbon reduction opportunities for supermarkets
Evans, J, Maidment, GG, Brown, T, Hammond, E and Foster, A (2016). Carbon reduction opportunities for supermarkets. IRHACE journal.
An investigation of refrigerant leakage in commercial refrigeration
Francis, C., Maidment, GG and Davies, G. (2016). An investigation of refrigerant leakage in commercial refrigeration. International Journal of Refrigeration. 74 (Feb), pp. 10-19. https://doi.org/10.1016/j.ijrefrig.2016.10.009
Life Cycle Assessment of salmon cold chains: Comparison between chilling and superchilling technologies
Hoang, HM, Leducq, D, Brown, T, Maidment, GG, Indergård, E and Alvarez, G (2015). Life Cycle Assessment of salmon cold chains: Comparison between chilling and superchilling technologies. Proceedings of the 24th IIR International Congress of Refrigeration. Yokohama, Japan 16 - 22 Aug 2015 International Institute of Refrigeration. pp. 4574-4581 https://doi.org/10.18462/iir.icr.2015.0440
Modelling and development of sustainable Refrigerated road transport systems
Francis, C, Davies, G., Evans, J, Maughan, P, Sherwood, J and Maidment, GG (2015). Modelling and development of sustainable Refrigerated road transport systems. Refrigeration Science and Technology. https://doi.org/10.18462/iir.icr.2015.0324
Ground source heat pumps and their interactions with underground railway tunnels in an urban environment: A review
Revesz, A, Chaer, I, Thompson, J, Mavroulidou, M, Gunn, MJ and Maidment, GG (2015). Ground source heat pumps and their interactions with underground railway tunnels in an urban environment: A review. Applied Thermal Engineering. 93, pp. 147 - 154. https://doi.org/10.1016/j.applthermaleng.2015.09.011
Estimation of Cooling Energy Demand and Carbon Emissions from Urban Buildings using a Quasi-dynamic Model
Cowan, D, Maidment, GG and Chaer, I (2014). Estimation of Cooling Energy Demand and Carbon Emissions from Urban Buildings using a Quasi-dynamic Model. ASHRAE 2014 Winter Conference. New York city, USA 18 - 22 Jan 2014 London South Bank University.
A Carbon Footprint Study and a Life Cycle Assessment of an identical Refrigerated Display Cabinet: comparative analysis of the respective ratios of embodied and operational impacts
Bibalou, D, Andrews, D, Chaer, I, Maidment, GG and Longhurst, M (2014). A Carbon Footprint Study and a Life Cycle Assessment of an identical Refrigerated Display Cabinet: comparative analysis of the respective ratios of embodied and operational impacts. 4th International Conference on Life Cycle Approaches. Lille, France 05 - 06 Nov 2014 Forum for Sustainability Through Life Cycle Innovation.
Theoretical modelling and experimental investigation of a thermal energy storage refrigerator
Marques, C., Davies, G., Evans, JA, Maidment, GG and Wood, ID (2013). Theoretical modelling and experimental investigation of a thermal energy storage refrigerator. Energy. 55, pp. 457-465. https://doi.org/10.1016/j.energy.2013.03.091
The use of phase change materials in domestic refrigerator applications
Evans, J, Marques, C., Davies, G, Maidment, GG and Wood, ID (2013). The use of phase change materials in domestic refrigerator applications. Proceedings of the Institute of Refrigeration 2013-2014. London, UK 07 Nov 2013 Institute of Refrigeration.
Novel design and performance enhancement of domestic refrigerators with thermal storage
Marques, C., Davies, G., Maidment, GG, Evans, JA and Wood, ID (2013). Novel design and performance enhancement of domestic refrigerators with thermal storage. Applied Thermal Engineering. 63 (2), pp. 511-519. https://doi.org/10.1016/j.applthermaleng.2013.11.043
Potential life cycle carbon savings with low emissivity packaging for refrigerated food on display
Davies, G., Man, CMD, Andrews, D, Paurine, A, Hutchins, MG and Maidment, GG (2012). Potential life cycle carbon savings with low emissivity packaging for refrigerated food on display. Journal of Food Engineering. 109 (2), pp. 202-208. https://doi.org/10.1016/j.jfoodeng.2011.10.018
Description and validation of a computer based refrigeration system simulator
Eames, IW, Brown, T, Evans, JA and Maidment, GG (2012). Description and validation of a computer based refrigeration system simulator. Computers and Electronics in Agriculture. 85, pp. 53-63. https://doi.org/10.1016/j.compag.2012.03.010
Carbon dioxide refrigeration with heat recovery for supermarkets
Colombo, I, Maidment, GG, Chaer, I and Missenden, JM (2012). Carbon dioxide refrigeration with heat recovery for supermarkets. International Journal of Low-Carbon Technologies. 9 (1), pp. 38-44. https://doi.org/10.1093/ijlct/cts040
Modelling of a thermal storage refrigerator
Marques, C., Davies, G., Evans, J., Maidment, G. and Wood I. (2011). Modelling of a thermal storage refrigerator. The 23rd IIR International Congress of Refrigeration. Prague, Czech Republic 01 - 01 Aug 2011 International Institute of Refrigeration.
REAL Zero – Reducing refrigerant emissions & leakage- feedback from the IOR Project
Cowan, D, Gartshore, J, Christina, F, Chaer, I and Maidment, GG (2011). REAL Zero – Reducing refrigerant emissions & leakage- feedback from the IOR Project. Proceedings of the Institute of Refrigeration.
Novel Design and Performance of Domestic Refrigerators
Marques, C., Evans, J., Davies, G., Maidment, G. and Wood I. (2010). Novel Design and Performance of Domestic Refrigerators. 1st IIR International Cold Chain Conference. UK, Cambridge 29 - 31 Mar 2010 International Institute of Refrigeration.
Application of Phase Change Materials to Domestic Refrigerators
Marques, C., Davies, G., Maidment, G., Evans, J. and Wood I. (2010). Application of Phase Change Materials to Domestic Refrigerators. 9th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air-Conditioning. Sofia, Bulgaria 29 Sep 210 - 01 Oct 2010 International Institute of Refrigeration.