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Reducing the cost of electricity storage with a novel solar thermal support scenario in pumped thermal energy storage (PTES)

Erişim

info:eu-repo/semantics/closedAccess

Tarih

2024

Yazar

Kurşun B.
Ökten K.
Özak B.

Üst veri

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Özet

Pumped Thermal Electricity Storage (PTES) is a system that allows the conversion of electrical energy into thermal energy and its more cost-effective storage. Thermal integration is one of the methods applied to increase the round-trip efficiency (?rt) of PTES. The disadvantage of TI-PTES systems that use solar energy as a heat source is the need to store hot water with an additional heat storage system due to fluctuations in solar energy. Additional heat storage system significantly increases the cost of energy storage. In this study, a novel solar thermal integration scenario was presented. The novelty in the study has been utilizing the same water tanks for both the thermal storage of electricity and thermal support. Thermal support for PTES was provided by a concentration photovoltaic thermal (CPVT) system. Thus, it was aimed to reduce additional heat storage costs. With the proposed design (STI(CPVT)-PTES), the power supplied to the compressor (?COMP) and round-trip efficiency varied in the range of 0.52–2.6 MW and 41.1–128.3 %, respectively. The overall exergy efficiency of the system varied between 19 % and 42 % depending on solar energy, sunshine duration, and parameter values. The parameter that most economically affected the system was the mass flow rate of the heat source (?hs), and the lowest levelized cost of storage (LCOS) was obtained as 0.227 $kWh?1 at a ?hs of 250 kg/s. With STI(CPVT)-PTES, a reduction in LCOS ranging from 1.3 % to 33.2 % was achieved compared to other thermal integration scenarios. Analysis results revealed that the proposed system has a high potential to be an alternative to other thermally integrated PTES systems. © 2023 Elsevier Ltd

Cilt

241

Bağlantı

https://doi.org/10.1016/j.applthermaleng.2023.122317
https://hdl.handle.net/20.500.12450/2869

Koleksiyonlar

  • Scopus İndeksli Yayınlar Koleksiyonu [1574]
  • WoS İndeksli Yayınlar Koleksiyonu [2182]

İlgili Öğeler

Başlık, yazar, küratör ve konuya göre gösterilen ilgili öğeler.

  • Improving the thermo-economic performance of a pumped thermal electricity storage (PTES) with a hybrid thermal integration scenario consisting of solar energy and waste heat 

    Kursun, Burak; Okten, Korhan (Elsevier, 2024)
    The pumped thermal electricity storage system stores electrical energy in the form of thermal energy and, when needed, converts the thermal energy back into electrical energy. The lack of geographical constraints and its ...
  • Thermo-economic assessment of a thermally integrated pumped thermal energy storage (TI-PTES) system combined with an absorption refrigeration cycle driven by low-grade heat source 

    Okten, Korhan; Kursun, Burak (Elsevier, 2022)
    The pumped thermal energy storage system (PTES), which offers cheaper storage of electrical energy, has been a widely discussed issue in the literature recently. Unlike the literature studies, in this study, an absorption ...
  • Comprehensive energy, exergy, and economic analysis of the scenario of supplementing pumped thermal energy storage (PTES) with a concentrated photovoltaic thermal system 

    Kursun, Burak; Okten, Korhan (Pergamon-Elsevier Science Ltd, 2022)
    The pumped thermal energy storage (PTES), which is designed to store electricity more cheaply, is one of the issues that have been discussed in recent years. In the PTES system, electrical energy is stored as hot water ...



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