Compressed-liquid energy storage with an adsorption-based vapor accumulator for solar-driven vapor compression systems in residential cooling

Mira-Hernández, Carolina; Weibel, Justin A.; Groll, Eckhard A.; Garimella, Suresh V.

doi:10.1016/j.ijrefrig.2015.11.015

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…A further promising area in configuring thermal stabilisation systems is using compressed-liquid thermal storage [36] rather than BES. So, for instance, the cost of energy removed from R32 refrigerant (when it is used as a «cold» accumulator) is three times lower than the cost of energy removed from BES.…”

Section: Discussionmentioning

confidence: 99%

Inverter Heat Pumps as a Variable Load for Off-Grid Solar-Powered Systems

et al. 2023

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The capacity of electric air conditioning and heating systems is growing rapidly, as is the nameplate capacity of PV power plants. While the demand for cooling has a positive correlation with solar irradiance, the demand for heating has an opposite relation. In this study, different approaches to design (aggregation; thermal, battery, and implicit storage) and control (frequency conversion; variable and adaptive load) and their effects on the efficiency of an off-grid active thermal stabilisation system based on a solar-powered heat pump are analysed. The case considered is a permafrost thermal stabilisation system in Norway. It is shown that proper layout and control of the system with an adaptive load can reduce capital expenditures and the total cost of ownership by 30–40%. Increases in the capacity factor and cooling stability of the systems with aggregated and variable loads are studied. The downside is that there is an increase in the compressor’s operation time by 50% with a variable load and by 25% per unit with aggregation, which means more frequent replacement in terms of motor hours. The approaches considered are applicable in a wide range of solar-powered facilities with a positive correlation between solar irradiation and energy demand, but the results are quite case-sensitive. The prospects of using excess refrigerant and soil for thermal energy storage instead of traditional electrochemical batteries are considered.

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Section: Discussionmentioning

confidence: 99%

Inverter Heat Pumps as a Variable Load for Off-Grid Solar-Powered Systems

et al. 2023

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“…The energy storage technologies can be divided in two general categories: i) Energy storage from electricity, ii) Direct energy storage. Energy storage techniques such as pumped hydroelectric, batteries, compressed air energy storage lie in the first category where the energy input to the storage facility is electricity [51][52][53][54][55]. The options that underlie in the second category such as carbon storage cycle, thermal storage and chemical storage can take a non-electricity form of energy usually thermal energy for energy storage [51,54,56,57].…”

Section: 2energy Storagementioning

confidence: 99%

Synthesis of efficient solar thermal power cycles for baseload power supply

Gençer

2017

Energy Conversion and Management

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Limited fossil fuel reserves and increasing greenhouse gas emissions from fossil fuels make it essential to develop alternative renewable energy conversion processes to meet energy needs. Advancements in renewable power production are especially important since electric power is the largest consumer of primary energy resources with the highest growth rate among alternate energy use sectors, and is currently responsible for greater than 40% of the global CO 2 emissions. Among the renewable energy sources, solar energy is prominent due to its abundance. Here, we introduce an efficient solar thermal power cycle, solar water power (SWP) cycle, with water as the working fluid, which undergoes reheats between expansions. SWP cycle is developed to maximize exergy efficiency, allow flexible operation and process intensification. Simulation and optimization of the SWP cycles are performed in an integrated Aspen Plus/MATLAB modeling environment. Modeling results predict that SWP cycle with 1 solar reheating stage has a potential to generate electricity with sun-to-electricity efficiencies greater than 30% at solar heat collection temperature as low as 750 K. The cycle also promises sun-to-electricity efficiencies in the unprecedented range of 40 to 46% for the corresponding temperatures above 1400K. Further efficiency increase is estimated by the addition of more reheating stages.

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“…In publications [6,8,9,11,15,18] it is possible to find the analysis of sorptive appliances practical usage in industrial applications, enabling to regain the heat from technological processes, waste heat from clinker cooler or the process of sintering and cooling iron-bearing materials in steel plants.…”

Section: Introductionmentioning

confidence: 99%

Operational research of adsorption chiller aggregate utilizing heat from district heating to produce chilled water for air conditioning

Stańczyk¹,

Karwat²,

Machnik³

et al. 2017

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Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionHeat distribution networks are complexed structures being a combination of pipes of various diameters, which carry the heat, by a thermodynamic factor, from the source producing the network heat to its terminal receivers. The heat is used to technological, warming and municipal purposes. The basic problem of heat distribution networks in summer season is the decrease in the demand for heat, which is mostly used for preparing domestic warm water. A discussion on the possibility of increasing heat distribution networks load by utilization the heat to produce chilled water by using absorptive as well as adsorptive aggregates has taken place for a couple of years. In Scandinavian counties the interest is particularly visible, mainly because of higher temperatures of the heating factor [17]. The data shown in publications [7,13] are a proof of an increasing tendency of network coolants supplies. In the majority of Polish cities, too low temperature of distribution network water, which in summer season varies from 66 to 70°C in the source, and in fact is 8°C lower reaching the receiver, restricts the usage of adsorptive air conditioning systems working in decentralized units. The minimum temperature of a factor which supplies absorptive, bromine-lithium refrigerators is about 72°C, whereas the effective work is possible at temperatures 85-90°C [20]. Increasing the temperature of a heating factor to parameters 90/55°C, typical for Scandinavian countries, would lead to increasing the heat loss during the transfer [21,22]. The problem of low temperature of water supplying sorptive cooling aggregates in summer season do not apply to silica gel adsorptive appliances, whose performance is possible for a heating factor at temperatures just above 55°C.Designing and development of adsorptive cooling systems, based on the usage of silica gel and sulfur dioxide began in the 20 th of the previous century [14]. A modification of the construction and applying various pairs of adsorbent-adsorbate have been done in order STAńczyk E, kArwAT B, MAchnik r, niEdźwiEdzki J. Operational research of adsorption chiller aggregate utilizing heat from district heating to produce chilled water for air conditioning. Eksploatacja i niezawodnosc -Maintenance and reliability 2017; 19 (2): 254-259, http://dx

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Compressed-liquid energy storage with an adsorption-based vapor accumulator for solar-driven vapor compression systems in residential cooling

Cited by 10 publications

References 22 publications

Inverter Heat Pumps as a Variable Load for Off-Grid Solar-Powered Systems

Inverter Heat Pumps as a Variable Load for Off-Grid Solar-Powered Systems

Synthesis of efficient solar thermal power cycles for baseload power supply

Operational research of adsorption chiller aggregate utilizing heat from district heating to produce chilled water for air conditioning

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