LCA and Exergo-Environmental Evaluation of a Combined Heat and Power Double-Flash Geothermal Power Plant

Colucci, Vitantonio; Manfrida, Giampaolo; Mendecka, Barbara; Talluri, Lorenzo; Zuffi, Claudio

doi:10.3390/su13041935

Cited by 16 publications

(20 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen in Figure 3, this study was based on the evaluation of the Hellisheidi power plant with a life-cycle perspective using a cradle-to-grave approach in order to develop a robust LCA study comparable to other geothermal systems. Due to multifunctional processes coexisting to simultaneously generate electricity and heat, there was a need to either assign or allocate the inputs and outputs to the relevant output flows [19]. Consequently, an allocation factor was considered according to a product logic that appropriately attributes material and energy inputs to properly quantify the corresponding environmental impacts to the respective outputs.…”

Section: • System Description and Boundariesmentioning

confidence: 99%

“…Due to multifunctional processes coexisting to simultaneously generate electricity and heat, there was a need to either assign or allocate the inputs and outputs to the relevant output flows [19]. Consequently, an allocation factor was considered according to a product logic that appropriately attributes material and energy inputs to properly quantify the corresponding environmental impacts to the respective outputs.…”

Section: • System Description and Boundariesmentioning

confidence: 99%

“…In these works, secondary data based on an ecoinvent v3.4 database were considered, and the CML-IA baseline and the cumulative energy demand (CED) were selected as the evaluation methods. Additional works by Paulillo et al [18] and Colucci et al [19] reprocessed these data using different LCA tools and considering updated LCIs based on more recent primary and secondary data (ecoinvent 3.6). Energy, exergy, and economic allocation methods are commonly used in LCA studies of CHP plants [17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

et al. 2023

Self Cite

View full text Add to dashboard Cite

The Hellisheidi geothermal power plant, located in Iceland, is a combined heat and power double-flash geothermal plant with an installed capacity of 303.3 MW of electricity and 133 MW of hot water. This study aimed to elucidate the environmental impacts of the electricity and heat production from this double-flash geothermal power plant. In this vein, firstly, the most updated inventory of the plant was generated, and secondly, a life-cycle assessment approach based on the exergy allocation factor was carried out instead of applying the traditionally used allocations in terms of mass and energy. The functional unit was defined as the production of 1 kWh of electricity and 1 kWh of hot water for district heating. The life-cycle stages included the (i) construction, (ii) operation (including abatement operations and maintenance), and (iii) well closure of the geothermal plant. All of the life-cycle stages from construction to dismantling were considered. Finally, the results on the partitioning of the environmental impact to electricity and heat with exergy allocations showed that most of the impact should be charged to electricity, as expected. Furthermore, the distribution of the environmental impacts among the life-cycle stages determined that the construction stage was the most impactful for the electricity and heat production. This result was attributable to the large consumption of steel that was demanded during the construction of the geothermal power plant (geothermal wells, equipment, and buildings). Impacts due to the abatement stage demonstrated that this stage satisfactorily reduced the total impact attributed to the three life-cycle stages of the geothermal power plant.

show abstract

Section: • System Description and Boundariesmentioning

confidence: 99%

Section: • System Description and Boundariesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Described in other words, it is necessary to include the environmental impact of the geothermal well in the exergoenvironmental analysis. Colucci et al [ 69 ] indicate that the environmental impact rate of a geothermal well can amount to 1.13 mpts/s.…”

Section: Thermodynamic Economic and Environmental Modelsmentioning

confidence: 99%

4E Assessment of an Organic Rankine Cycle (ORC) Activated with Waste Heat of a Flash–Binary Geothermal Power Plant

Ambriz-Díaz

Rosas

Chávez

et al. 2022

Entropy

View full text Add to dashboard Cite

In this paper, the 4E assessment (Energetic, Exergetic, Exergoeconomic and Exergoenvironmental) of a low-temperature ORC activated by two different alternatives is presented. The first alternative (S1) contemplates the activation of the ORC through the recovery of waste heat from a flash–binary geothermal power plant. The second alternative (S2) contemplates the activation of the ORC using direct heat from a geothermal well. For both alternatives, the energetic and exergetic models were established. At the same time, the economic and environmental impact models were developed. Finally, based on the combination of the exergy concepts and the economic and ecological indicators, the exergoeconomic and exergoenvironmental performances of the ORC were obtained. The results show higher economic, exergoeconomic and exergoenvironmental profitability for S1. Besides, for the alternative S1, the ORC cycle has an acceptable economic profitability for a net power of 358.4 kW at a temperature of 110 °C, while for S2, this profitability starts being attractive for a power 2.65 times greater than S1 and with a temperature higher than 135 °C. In conclusion, the above represents an area of opportunity and a considerable advantage for the implementation of the ORC in the recovery of waste heat from flash–binary geothermal power plants.

show abstract

“…While the parallel configuration offers high temperature levels for the district heating system, the serial configuration allows high utilization of the heat source. [20,21]. This power plant is arranged as a hybrid scheme for CHP, with serial freshwater low temperature preheating from the high-pressure flash exhaust steam, and parallel feed from the low-pressure flash condensate stream to heat preheated water up to the temperature required by the district heating of around 90 • C.…”

Section: Case Studies Descriptionmentioning

confidence: 99%

A Comparison of Different Approaches for Assessing Energy Outputs of Combined Heat and Power Geothermal Plants

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this paper, we assess using two alternative allocation schemes, namely exergy and primary energy saving (PES) to compare products generated in different combined heat and power (CHP) geothermal systems. In particular, the adequacy and feasibility of the schemes recommended for allocation are demonstrated by their application to three relevant and significantly different case studies of geothermal CHPs, i.e., (1) Chiusdino in Italy, (2) Altheim in Austria, and (3) Hellisheidi in Iceland. The results showed that, given the generally low temperature level of the cogenerated heat (80–100 °C, usually exploited in district heating), the use of exergy allocation largely marginalizes the importance of the heat byproduct, thus, becoming almost equivalent to electricity for the Chiusdino and Hellisheidi power plants. Therefore, the PES scheme is found to be the more appropriate allocation scheme. Additionally, the exergy scheme is mandatory for allocating power plants’ environmental impacts at a component level in CHP systems. The main drawback of the PES scheme is its country dependency due to the different fuels used, but reasonable and representative values can be achieved based on average EU heat and power generation efficiencies.

show abstract

LCA and Exergo-Environmental Evaluation of a Combined Heat and Power Double-Flash Geothermal Power Plant

Cited by 16 publications

References 27 publications

Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

Environmental Assessment of Hellisheidi Geothermal Power Plant based on Exergy Allocation Factors for Heat and Electricity Production

4E Assessment of an Organic Rankine Cycle (ORC) Activated with Waste Heat of a Flash–Binary Geothermal Power Plant

A Comparison of Different Approaches for Assessing Energy Outputs of Combined Heat and Power Geothermal Plants

Contact Info

Product

Resources

About