Design of a combined heating, cooling and power system: Sizing, operation strategy selection and parametric analysis

Kavvadias, Konstantinos; Tosios, Anastasios; Maroulis, Z.B.

doi:10.1016/j.enconman.2009.11.019

Cited by 174 publications

(64 citation statements)

References 28 publications

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“…They quantified the benefits of using the hybrid strategy over the other two conventional strategies in terms of the primary energy consumption, operating cost and emission. Kavvadias et al [15] summarised three other commonly used operating strategies including continuous operation, peak-shaving and base load operation. Facci et al [16] used dynamic programming to investigate optimum control of trigeneration plants over short time horizons (one day).…”

Section: Reviewmentioning

confidence: 99%

Scheduling of Multiple Chillers in Trigeneration Plants

Underwood

Yik³

2015

Energies

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Abstract:The scheduling of both absorption cycle and vapour compression cycle chillers in trigeneration plants is investigated in this work. Many trigeneration plants use absorption cycle chillers only but there are potential performance advantages to be gained by using a combination of absorption and compression chillers especially in situations where the building electrical demand to be met by the combined heat and power (CHP) plant is variable. Simulation models of both types of chillers are developed together with a simple model of a variable-capacity CHP engine developed by curve-fitting to supplier's data. The models are linked to form an optimisation problem in which the contribution of both chiller types is determined at a maximum value of operating cost (or carbon emission) saving. Results show that an optimum operating condition arises at moderately high air conditioning demands and moderately low power demand when the air conditioning demand is shared between both chillers, all recovered heat is utilised, and the contribution arising from the compression chiller results in an increase in CHP power generation and, hence, engine efficiency.

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Section: Reviewmentioning

confidence: 99%

Scheduling of Multiple Chillers in Trigeneration Plants

Underwood

Yik³

2015

Energies

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“…Thermodynamic and economical performances are strictly related to the operation strategy in cogeneration and trigeneration systems [22]. An innovative operation strategy defined and analyzed in [22] is also used here, which does not follow electricity or heat demand separately, but considers both of them together and simultaneously. In this strategy, an electric equivalent load (EEL) parameter is defined, which is the electrical demand for both the user and the heat pump.…”

Section: Operation Strategymentioning

confidence: 99%

“…To provide the same quantities of energy, PES is related to the fuel consumption of the fuel cell, energy consumption of the system (electricity and heat) and also to the efficiency that a traditional system with separated production of heat and electricity has. PES is defined according to the study of a trigeneration system in [22] as…”

Section: Thermodynamic Analysismentioning

confidence: 99%

Innovative household systems based on solid oxide fuel cells for a northern European climate

Vialetto

Rokni

2015

Renewable Energy

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Energy saving is an open point in most European countries where energy policies are oriented to reduce the use of fossil fuels, greenhouses emissions and energy independence and to increase the use of renewable energies. In the last several years, new technologies have been developed, and some of them received subsidies to increase installation and reduce cost.This article presents an innovative cogeneration system based on a solid oxide fuel cell (SOFC) system and heat pump for household applications with a focus on primary energy and economic savings using electric equivalent load parameter which is a function of the electricity and heat demand of the user, and allows different operation strategies to be considered. The proposal is to maximize the efficiency of the system and to make it profitable, even though technologies with a high purchase cost are considered. Simulations of the system are performed under different strategies at a resort located in a northern European climate (Denmark) to cover electricity, space heating and domestic hot water (DHW) demands. The results of these simulations are analyzed with thermodynamic and technoeconomic benchmarks, considering different economic scenarios. The calculations show the high primary energy saving and profitability of the system.

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“…Included in many of these studies are examinations of the most advantageous role of energy storage (Rong et al 2008) and advances in that technology (Lund et al 2014), as well as specialized integrated applications (Chacartegui et al 2009;Lai and Hui 2010). This includes determining for such systems the most viable and optimal scale (Wang et al 2015;Chicco and Mancarella 2009a;Badami and Portoraro 2009;Kavvadias et al 2010), the required level of flexibility (Lai and Hui 2009) and appropriate operation strategies (Kavvadias et al 2010). Also, optimization methods have been applied to the operation and structure of cogenerationbased district heating with long-term thermal storage (Tveit et al 2009).…”

Section: Integration With Energy Systemsmentioning

confidence: 99%

Optimization of seasonal storage for community-level energy systems: status and needs

Koohi-Fayegh

Rosen

2017

Energ. Ecol. Environ.

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The status and needs relating to the optimal design of community seasonal energy storage are reported. Thermal energy storage research has often focused on technology development and integration into buildings, but little emphasis has been placed on the most advantageous use of thermal storage in community energy systems. Depending on the composition and characteristics of a community, the most appropriate community thermal storage may differ from that for a single building. District energy systems usually link thermal users to cold supplies and/or heat supplies (e.g., solar thermal energy, geothermal energy from ground-source heat pumps or geothermal hot zones, industrial waste heat, thermal energy from cogeneration or trigeneration). It is demonstrated that the optimal integration of these technologies can be enhanced through the use of appropriate seasonal thermal energy storage and that community-level seasonal storage can facilitate the development of smart net-zero energy buildings and yield efficiency, economic and environmental benefits. Issues that need to be resolved to allow optimal solutions to be attained are described. Advanced tools are required for modeling, simulation, analysis, improvement, design and optimization, which incorporate advanced methods like exergy analysis. The most appropriate scale, number and type (e.g., sensible, latent, thermochemical) of thermal storages in a community need to be better assessed, and the appropriate time duration capacities for each determined in an optimal manner. This is particularly important since a combination of short-, medium-and long-term storage is sometimes required to yield the most benefits from community energy systems.

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Design of a combined heating, cooling and power system: Sizing, operation strategy selection and parametric analysis

Cited by 174 publications

References 28 publications

Scheduling of Multiple Chillers in Trigeneration Plants

Scheduling of Multiple Chillers in Trigeneration Plants

Innovative household systems based on solid oxide fuel cells for a northern European climate

Optimization of seasonal storage for community-level energy systems: status and needs

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