An integrated combined power and cooling strategy for small islands

Yousefzadeh, Moslem; Lenzen, Manfred; Tyedmers, Elijah; Ali, Syed Muhammad Hassan

doi:10.1016/j.jclepro.2020.122840

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…We calculated the cold rooms' heat load considering the heat leakage from walls, heat generation from lights and fans and infiltration of outside air into the cold room. To this end, we used the method explained in our previous work [69]. We also investigated the effect of the bio-waste-fired boiler's proximity to the cold store.…”

Section: Heat Loadmentioning

confidence: 99%

“…On the other hand, the hot water temperature should be above a certain level for normal operation of the chiller at a given output temperature. For a typical ammonia absorption chiller operating at −20 • C, the required temperature of hot water and the COP are 145 • C and 45% [69,73].…”

Section: Chillermentioning

confidence: 99%

“…Given the characteristics of the chiller, we designed a heat exchanger to recover the thermal energy of the flue gas and heat the water entering the chiller. The heat exchanger's design method is described in our previous work [69]. We also consider using direct heat from the combustion chamber if the recovered heat is insufficient for running the chiller.…”

Section: Heat Recovery and Chiller Energy Supplymentioning

confidence: 99%

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Cooling and Power from Waste and Agriculture Residue as a Sustainable Strategy for Small Islands—A Case Study of Tonga

Yousefzadeh

Lenzen

Tariq³

2022

Sustainability

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Identifying local energy sources and devising a circular economy could improve self-sufficiency in many Pacific Islands. On the islands with significant agriculture, the residue from the cultivation of plants has promising energy potential. The waste stream is another potential source of energy that otherwise should undergo proper treatment. Additionally, cold-storage capacity improves the preservation of crops and increases the agricultural exports of these islands. This study proposes a combined cooling and power (CCP) system driven by biomass from agriculture residue and waste streams as fuel for different districts in Tonga. The units supply a fraction of the districts’ electricity demand and provide sufficient cold-storage capacity to preserve the prospective yield of a fraction of fallow lands. The technical and economic performance of the CCP units was analysed for different fractions of electricity demand and fallow land exploitation in each district during a year of operation. The results show that the optimum combination of the CCP units supplies 38% of the total electricity demand of Tonga and prevents the annual consumption of 7.4 million litres of diesel and emission of 20 kilotonnes of CO2. In addition, it provides 3700 m2 of cold-storage area, which is sufficient for preserving the prospective yield of the exploitation of 27% of the total fallow land of Tonga. Annual export revenue of about AU$10 million is expected from such a cold-storage capacity for Tongan farmers. Furthermore, the units consume 10,000 tonnes of annual waste, significantly reducing waste management costs. This study presents an example of a comprehensive circular-economy solution for a remote island state that improves its socioeconomic and environmental condition by supplying the community’s local needs from its available and abundant resources under a viable business model. The solution presented in this study can be adapted to many island communities with significant agriculture in the economy and crucial energy and cooling needs.

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Section: Heat Loadmentioning

confidence: 99%

Section: Chillermentioning

confidence: 99%

Section: Heat Recovery and Chiller Energy Supplymentioning

confidence: 99%

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Cooling and Power from Waste and Agriculture Residue as a Sustainable Strategy for Small Islands—A Case Study of Tonga

Yousefzadeh

Lenzen

Tariq³

2022

Sustainability

Self Cite

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“…Absorption systems require small amounts of electrical energy to be powered while the main energy input is thermal energy. This thermal energy can come from different heat sources such as renewable energies, residual heat, or natural gas [3][4][5]. The main difference between vapour absorption systems and conventional vapour compression units relies on the way how the refrigerant flow coming from the evaporator becomes a high temperature and pressure vapour, which is under the required conditions to be condensed.…”

Section: Introductionmentioning

confidence: 99%

Technical and environmental performance of a solar/gas driven absorption chiller using NH3/LiNO3

2022

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This study deals with the evaluation of the technical and environmental operation of solar/gas driven NH3/LiNO3 absorption chillers for malls under the environmental conditions of the city of Barranquilla, Colombia. It involves a sensitivity study on the absorption chillers performance at chilled water temperatures of 12 °C and 6 °C and different solar irradiations. It also includes the share of cooling and CO2 equivalent emissions provided by the absorption chillers considering as a base case the energy consumed by the mechanical vapour compression chillers operating in three selected malls. Results showed that solar energy could provide around 40% and 50% of the total energy required to drive the absorption chillers on a service day. This value could be increased by adding a higher solar panel area, however, the available roof area for solar equipment was a limiting factor. Moreover, the COP and SCOP of the absorption chillers were found up to 0.64 and 0.44, respectively. Additionally, the solar/gas driven absorption chillers could cover up to 83%, 100%, and 35% of the peak cooling requirements in malls 1, 2, and 3, respectively, while providing the highest reductions in CO2 equivalent emissions.

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“…Remote areas like oceanic islands, rural villages, and military outposts are far from the utility grid and rely on independent islanded microgrids (MG) to generate and distribute electricity. Diesel generator or gas turbine are common power source for such MG [1], and they rely on fossil fuel for power generation. Conventional power supply mode has various flaws, including high fuel transport cost, high CO2 emission, environmental pollution, and poor power supply reliability [2].…”

Section: Introductionmentioning

confidence: 99%

Configuration and techno-economic comparison of compressed air energy storage and battery storage in islanded microgrid

Zhang

2022

Seventh International Conference on Electromechanical Control Technology and Transportation (ICECTT 2022)

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This paper proposes a configuration method for islanded microgrid with wind, solar PV, gas turbine, and energy storage system. The objective is to minimize the annual cost of the microgrid. The microgrid's cost model is established, considering capital investment cost, operation and maintenance cost, and replacement cost. Configuration results with adopting lithium battery and compressed air energy storage under different renewable penetration are discussed. The configuration result shows that a microgrid with a compressed air energy storage system has a lower annual cost than a lithium battery.

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An integrated combined power and cooling strategy for small islands

Cited by 10 publications

References 22 publications

Cooling and Power from Waste and Agriculture Residue as a Sustainable Strategy for Small Islands—A Case Study of Tonga

Cooling and Power from Waste and Agriculture Residue as a Sustainable Strategy for Small Islands—A Case Study of Tonga

Technical and environmental performance of a solar/gas driven absorption chiller using NH3/LiNO3

Configuration and techno-economic comparison of compressed air energy storage and battery storage in islanded microgrid

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