All Outputs (19)

Experimental comparison of a DC PV cooker and a parabolic dish solar cooker under variable solar radiation conditions (2024)
Journal Article
Mawire, A., Abedigamba, O. P., & Worall, M. (2024). Experimental comparison of a DC PV cooker and a parabolic dish solar cooker under variable solar radiation conditions. Case Studies in Thermal Engineering, 54, Article 103976. https://doi.org/10.1016/j.csite.2024.103976

Solar cookers are not all-weather cooking devices and operate poorly during cloudy and low sunshine conditions. Their performance is evaluated usually during high solar radiation conditions. The objective of this study is to compare two solar cookers... Read More about Experimental comparison of a DC PV cooker and a parabolic dish solar cooker under variable solar radiation conditions.

The effect of nucleating agent on the multiphase change materials for energy storage in buildings (2023)
Journal Article
Sinaga, R., Darkwa, J., Worall, M., & Su, W. (2024). The effect of nucleating agent on the multiphase change materials for energy storage in buildings. Applied Thermal Engineering, 239, Article 122153. https://doi.org/10.1016/j.applthermaleng.2023.122153

Phase change materials (PCMs) have the potential to be used for widespread energy storage applications in buildings. However, available PCMs can only function at fixed phase transitional temperatures, restricting their seasonal applicability. To this... Read More about The effect of nucleating agent on the multiphase change materials for energy storage in buildings.

Synthesis and Characterization of Doped Magnesium Hydroxide for Medium Heat Storage Application (2023)
Journal Article
Albeladi, N., Kur, A., Mokaya, R., Darkwa, J., Roger-Lund, S., Worall, M., …Boukhanouf, R. (2023). Synthesis and Characterization of Doped Magnesium Hydroxide for Medium Heat Storage Application. Materials, 16(18), Article 6296. https://doi.org/10.3390/ma16186296

The amount of waste heat generated annually in the UK exceeds the total annual electricity demand. Hence, it is crucial to effectively harness all available sources of waste heat based on their varying temperatures. Through suitable technologies, a s... Read More about Synthesis and Characterization of Doped Magnesium Hydroxide for Medium Heat Storage Application.

Solid–Gas Thermochemical Energy Storage Materials and Reactors for Low to High-Temperature Applications: A Concise Review (2023)
Journal Article
Kur, A., Darkwa, J., Calautit, J., Boukhanouf, R., & Worall, M. (2023). Solid–Gas Thermochemical Energy Storage Materials and Reactors for Low to High-Temperature Applications: A Concise Review. Energies, 16(2), Article 756. https://doi.org/10.3390/en16020756

Thermochemical energy storage materials and reactors have been reviewed for a range of temperature applications. For low-temperature applications, magnesium chloride is found to be a suitable candidate at temperatures up to 100 °C, whereas calcium hy... Read More about Solid–Gas Thermochemical Energy Storage Materials and Reactors for Low to High-Temperature Applications: A Concise Review.

The microencapsulation, thermal enhancement, and applications of medium and high-melting temperature phase change materials: A review (2022)
Journal Article
Sinaga, R., Darkwa, J., Omer, S. A., & Worall, M. (2022). The microencapsulation, thermal enhancement, and applications of medium and high-melting temperature phase change materials: A review. International Journal of Energy Research, 46(8), 10259-10300. https://doi.org/10.1002/er.7860

Microencapsulated phase change materials (MEPCMs) have made tremendous advancements in recent years, owing to their increased demand for a variety of energy storage applications. In this paper, current microencapsulation techniques, enhancement, and... Read More about The microencapsulation, thermal enhancement, and applications of medium and high-melting temperature phase change materials: A review.

Potential of Bioenergy in Rural Ghana (2021)
Journal Article
Nelson, N., Darkwa, J., Calautit, J., Worall, M., Mokaya, R., Adjei, E., …Ahiekpor, J. (2021). Potential of Bioenergy in Rural Ghana. Sustainability, 13(1), Article 381. https://doi.org/10.3390/su13010381

Crop residues are common in rural Ghana due to the predominant role agriculture plays in livelihood activities in these communities. In this paper we investigate the prospects of exploiting agricultural crop residues for rural development in Ghana th... Read More about Potential of Bioenergy in Rural Ghana.

Performance comparison of two solar cooking storage pots combined with wonderbag slow cookers for off-sunshine cooking (2020)
Journal Article
Mawire, A., Lentswe, K., Owusu, P., Shobo, A., Darkwa, J., Calautit, J., & Worall, M. (2020). Performance comparison of two solar cooking storage pots combined with wonderbag slow cookers for off-sunshine cooking. Solar Energy, 208, 1166-1180. https://doi.org/10.1016/j.solener.2020.08.053

Two similar storage cooking pots are experimentally evaluated and compared during solar cooking and storage off-sunshine cooking periods. One storage pot has sunflower oil as the sensible heat storage material, while the other has erythritol as the p... Read More about Performance comparison of two solar cooking storage pots combined with wonderbag slow cookers for off-sunshine cooking.

Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air (2019)
Journal Article
AL-nuaimi, A., Worall, M., & Riffat, S. (2019). Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air. International Journal of Low-Carbon Technologies, 14(4), 550-560. https://doi.org/10.1093/ijlct/ctz050

Ejectors have some advantages such as being simple, reliable and no moving parts. They can be used in air-conditioning and refrigeration applications. This paper presents a comparison of ejector performance, primary pressure (Pp), back pressure (Pb)... Read More about Theoretical and experimental investigations of different area ratios of a supersonic ejector driven by compressed air.

A novel hybrid dew point cooling system for mobile applications (2018)
Conference Proceeding
Worall, M., Dicken, A., Shatat, M., Gledhill, S., & Riffat, S. (2018). A novel hybrid dew point cooling system for mobile applications

A novel dew point cooling system for truck cabin cooling has been designed and tested, which shows excellent performance in environments of low to medium relative humidity. Experimental results showed that cooling capacity of over 1kW could be achiev... Read More about A novel hybrid dew point cooling system for mobile applications.

An experimental investigation of a micro-tubular SOFC membrane-separated liquid desiccant dehumidification and cooling tri-generation system (2017)
Journal Article
Worall, M., Elmer, T., Riffat, S., Wu, S., & Du, S. (2017). An experimental investigation of a micro-tubular SOFC membrane-separated liquid desiccant dehumidification and cooling tri-generation system. Applied Thermal Engineering, 120, https://doi.org/10.1016/j.applthermaleng.2017.03.032

This paper reports the results of experimental work carried out on a micro-tubular solid oxide fuel cell tri-generation systemthat uses the waste heat from the fuel cell for dehumidification and cooling though the integration of an open cycle liquid... Read More about An experimental investigation of a micro-tubular SOFC membrane-separated liquid desiccant dehumidification and cooling tri-generation system.

Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system (2016)
Journal Article
Boukhanouf, R., Alharbi, A., Ibrahim, H. G., Amer, O., & Worall, M. (2017). Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system. Applied Thermal Engineering, 115, https://doi.org/10.1016/j.applthermaleng.2016.12.119

The paper presents computer modelling and laboratory experiment results of a sub-wet bulb temperature indirect evaporative cooling system for space cooling in buildings. The prototype employs hollow porous ceramic water containers as wet media materi... Read More about Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system.

Assessment of a novel solid oxide fuel cell tri-generation system for building applications (2016)
Journal Article
Elmer, T., Worall, M., Wu, S., & Riffat, S. (2016). Assessment of a novel solid oxide fuel cell tri-generation system for building applications. Energy Conversion and Management, 124, https://doi.org/10.1016/j.enconman.2016.07.010

The paper provides a performance analysis assessment of a novel solid oxide fuel cell (SOFC) liquid desiccant tri-generation system for building applications. The work presented serves to build upon the current literature related to experimental eval... Read More about Assessment of a novel solid oxide fuel cell tri-generation system for building applications.

Experimental evaluation of a liquid desiccant air conditioning system for tri-generation / waste heat driven applications (2016)
Journal Article
Elmer, T., Worall, M., Wu, S., & Riffat, S. (2017). Experimental evaluation of a liquid desiccant air conditioning system for tri-generation / waste heat driven applications. International Journal of Low-Carbon Technologies, 12(2), 110-125. https://doi.org/10.1093/ijlct/ctw012

The paper aims to evaluate the application of liquid desiccant air conditioning technology in the development of efficient and effective tri-generation/waste heat driven system applications, in particular with regard to solid oxide fuel cell (SOFC) t... Read More about Experimental evaluation of a liquid desiccant air conditioning system for tri-generation / waste heat driven applications.

An experimental study of a novel integrated desiccant air conditioning system for building applications (2015)
Journal Article
Elmer, T., Worall, M., Wu, S., & Riffat, S. (2016). An experimental study of a novel integrated desiccant air conditioning system for building applications. Energy and Buildings, 111, https://doi.org/10.1016/j.enbuild.2015.11.065

To date, the application of liquid desiccant air conditioning systems in built environment applications, particularly small scale, has been limited. This is primarily due to large system size and complexity, issues of desiccant solution leakage and c... Read More about An experimental study of a novel integrated desiccant air conditioning system for building applications.

Emission and economic performance assessment of a solid oxide fuel cell micro-combined heat and power system in a domestic building (2015)
Journal Article
Elmer, T., Worall, M., Wu, S., & Riffat, S. (2015). Emission and economic performance assessment of a solid oxide fuel cell micro-combined heat and power system in a domestic building. Applied Thermal Engineering, 90, https://doi.org/10.1016/j.applthermaleng.2015.03.078

Combined heat and power (CHP) is a promising technological configuration for reducing energy consumption and increasing energy security in the domestic built environment. Fuel cells, on account of their: high electrical efficiency, low emissions and... Read More about Emission and economic performance assessment of a solid oxide fuel cell micro-combined heat and power system in a domestic building.

Fuel cell technology for domestic built environment applications: state of-the-art review (2014)
Journal Article
Elmer, T., Worall, M., Wu, S., & Riffat, S. (2015). Fuel cell technology for domestic built environment applications: state of-the-art review. Renewable and Sustainable Energy Reviews, 42, https://doi.org/10.1016/j.rser.2014.10.080

Fuel cells produce heat when generating electricity, thus they are of particular interest for combined heat and power (CHP) and combined cooling heat and power (CCHP) applications, also known as tri-generation systems. CHP and tri-generation systems... Read More about Fuel cell technology for domestic built environment applications: state of-the-art review.

Experimental investigation on PCM cold storage integrated with ejector cooling system (2013)
Journal Article
Chen, X., Worall, M., Omer, S., Su, Y., & Riffat, S. (2014). Experimental investigation on PCM cold storage integrated with ejector cooling system. Applied Thermal Engineering, 63(1), 419-427. https://doi.org/10.1016/j.applthermaleng.2013.11.029

An experimental investigation on the operating characteristics of cold storage ejector cooling system with finned tube inside a cylindrical PCM tank was presented in this paper. The PCM cold storage tank was coupled with the evaporator to store the e... Read More about Experimental investigation on PCM cold storage integrated with ejector cooling system.

Intelligent thermoregulation and homeostasis: lessons from nature (2010)
Conference Proceeding
Worall, M. (2010). Intelligent thermoregulation and homeostasis: lessons from nature.

Mankind has developed sophisticated means of maintaining comfortable living conditions around the world. We use many technologies that allow us to achieve thermoregulation and homeostasis and so live, work and survive in otherwise hostile environment... Read More about Intelligent thermoregulation and homeostasis: lessons from nature.

Design analysis of a hybrid jet-pump CO2 compression system
Conference Proceeding
Worall, M., Omer, S., & Riffat, S. (2010). Design analysis of a hybrid jet-pump CO2 compression system.

Transport refrigeration contributes to anthropogenic global warming directly because of leakage of refrigerant, usually using high global warming potential (GWP) refrigerants, and indirectly because of the greenhouse gases emitted in driving the vehi... Read More about Design analysis of a hybrid jet-pump CO2 compression system.