Low GWP Refrigerants for Energy Conservation and Environmental Sustainability

Uddin, Kutub; Saha, Bidyut Baran; Thu, Kyaw; Koyama, Shigeru

doi:10.1007/978-981-13-3302-6_15

Cited by 9 publications

(5 citation statements)

References 78 publications

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“…Agrawal et al (2017) evaluated the performance of a domestic refrigerator with R600a/R290 (50%/50%) versus R134a, obtaining an increase in the cooling capacity and minor energy consumption using R600a/R290. It must be considered that the evaluation of HCs do not use the compressor designed for HFC since HCs have a density approximately 55% lower than HFCs; therefore, a compressor with a higher displacement is required to avoid affecting its performance (Zhang et al 2019), and a special safety provision, so the system works with flammable refrigerants (Uddin et al 2019). Therefore, these operational aspects and characteristics of HCs promotes the continuous search for new mixtures of HCs.…”

Section: Alternative Mixtures For R134amentioning

confidence: 99%

Overview of low GWP mixtures for the replacement of HFC refrigerants: R134a, R404A and R410A

Heredia-Aricapa¹,

Belman-Flores²,

Mota-Babiloni

et al. 2020

International Journal of Refrigeration

208

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Section: Alternative Mixtures For R134amentioning

confidence: 99%

Overview of low GWP mixtures for the replacement of HFC refrigerants: R134a, R404A and R410A

Heredia-Aricapa¹,

Belman-Flores²,

Mota-Babiloni

et al. 2020

International Journal of Refrigeration

208

View full text Add to dashboard Cite

“…36 Desirable characteristics of the next generation of refrigerants include: zero ODP, low GWP, short lifetime in the atmosphere, and high efficiency refrigerants that are also nontoxic, non-flammable, and environmentally friendly. 37 Currently, hydrofluorocarbons (HFCs) are the refrigerant of choice in the United States. Many of the HFCs in use today have no ODP, are non-flammable, recyclable, and energy efficient, but they have high GWP 38 because they are potent greenhouse gases that survive in the atmosphere for many years.…”

Section: Vapor Compression Heating and Coolingmentioning

confidence: 99%

Materials research and development needs to enable efficient and electrified buildings

2021

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Because of the complexity of modern buildings—with many interconnected materials, components, and systems—fully electrifying buildings will require targeted R&D and efficient coordination across those material, component, and system levels. Because buildings that consume the smallest amount of energy are easier to electrify, energy efficiency is a crucial step toward fully electrified buildings. Materials advances will play an important role in both reducing the energy intensity of buildings and electrifying their remaining energy use. Materials are currently being explored, discovered, synthesized, evaluated, optimized, and implemented across many building components, including solid-state lighting; dynamic windows and opaque envelopes; cold climate heat pumps; thermal energy storage; heating, ventilating, and air conditioning (HVAC); refrigeration; non-vapor compression HVAC; and more. In this article, we review the current state-of-the-art of materials for various buildings end uses and discuss R&D challenges and opportunities for both efficiency and electrification. Graphical abstract

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“…With the increasing power demand, greenhouse gas emission has increased tremendously and nature is going to state beyond recovery [1][2][3][4][5][6][7] . To reduce greenhouse gas researchers around the world are working on various renewable and sustainable energy technologies 6,8) like solar photovoltaics 9,10) , solar thermal collectors 11) , wind energy systems 12) , carbon dioxide-free energy systems 13) , and hydrogen energy systems such as fuel cells 14,15) and nuclear fusion reactors 16,17) , etc. The above-mentioned systems could mitigate the energy crisis and can help to build a sustainable energy system.…”

Section: Introductionmentioning

confidence: 99%

Energy Conservation of Smart Grid System Using Voltage Reduction Technique and Its Challenges

Rahman¹,

Saha²,

Majumder³

et al. 2022

Evergreen

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Energy conservation has become crucial due to the present energy crisis in the world. To resolve such crises and reduce peak hours' electricity demand, the conservation voltage reduction (CVR) technique is frequently implemented in the power grid system. In this paper, experimental work along with simulation has been done to conserve energy by employing the CVR technique in a smart grid (SG). To verify the simulation result, an Arduino-based SG has been designed with a realtime clock (RTC) and Wi-Fi module esp8266. A program has been developed and burnt into a microcontroller integrated circuit (IC) of an Arduino board that senses day-to-day peak and/or offpeak hours of electricity consumption. The intelligent program that has been put in the system to control the switching of triode for AC (i.e., TRIAC) with an optocoupler to vary the firing angle α (0-π). At peak hours the developed system optimizes the output supplied voltage to load and it results in lesser supplied power at load. The energy consumption data is then sent to the ThingSpeak cloud for remote monitoring. Data aggregation and analytics can be done on ThingSpeak to estimate the energy consumption trend and according to the trend distribution management can notify the generation section for demand management. It has been found that the CVR technique is feasible in RTC-based SG systems which conserves 8.33 % energy by considering 2 ms as an optimized firing delay while the CVR factor = 1. The developed RTC-based SG could be useful in mitigating the present energy crisis in developing countries.

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Low GWP Refrigerants for Energy Conservation and Environmental Sustainability

Cited by 9 publications

References 78 publications

Overview of low GWP mixtures for the replacement of HFC refrigerants: R134a, R404A and R410A

Overview of low GWP mixtures for the replacement of HFC refrigerants: R134a, R404A and R410A

Materials research and development needs to enable efficient and electrified buildings

Energy Conservation of Smart Grid System Using Voltage Reduction Technique and Its Challenges

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