کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5127341 1489009 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultra-high temperature thermal energy storage. part 1: concepts
ترجمه فارسی عنوان
ذخیره انرژی حرارتی فوق العاده بالا. قسمت 1: مفاهیم
کلمات کلیدی
ذخیره انرژی انرژی حرارتی پمپ حرارتی الکتریکی نسل سوم،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی


- Energy storage at ultra-high temperature is reversible and suffers no degradation.
- Methods to reduce heat lose at ultra-high temperatures are described and analysed.
- Once loss reduction concepts are applied ultra-high temperature storage is viable.
- Energy density exceeds other storage methods whilst efficiency is competitive.

Renewable energy sourced from the sun, wind, waves or tides is clean and secure. Unfortunately, the energy that can be extracted from renewables and the demand for it varies both temporally and spatially. Therefore, energy storage is required to match generation with use. To date grid-scale energy storage has been limited by low energy densities, long-term performance degradation, low round-trip efficiencies or limited deployment locations. Although thermal storage has found uses these have been restricted to lower temperatures by thermal losses resulting in low energy densities and uneconomical electricity generation efficiency. In this paper an ultra-high temperature (1800 K) storage system is proposed where heat losses are minimised and recovered to make a higher storage temperature attractive, thus unlocking greater energy densities and efficiencies. Radiation dominates heat losses at ultra-high temperatures but can be minimised through the design of the storage medium container. However, even after energy is lost from storage, heat pumps in the store and charge cycles in addition to preheating during the extraction cycle can be used to recover a significant amount of heat. Collectively loss reduction and recovery techniques can lead to a storage system with a performance and utility that exceeds other energy storage methods Here the feasibility of the novel storage technique is demonstrated through thermodynamic and thermal analysis in each of the three key states of operation: charge, store and generation.

Energy storage at ultra-high temperatures (1800 K) is clean, reversible and insensitive to deployment location whilst suffering no storage medium degradation over time. Beyond this, it unlocks greater energy densities and competitive electric-to electric recovery efficiencies than other approaches. In this paper novel heat loss reduction and recovery techniques are described and then demonstrated through thermodynamic and thermal analysis.91

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Storage - Volume 13, October 2017, Pages 277-286
نویسندگان
,