Int. J. Energy Res.
 1998
DOI: 10.1002/(sici)1099-114x(19980325)22:4<363::aid-er374>3.0.co;2-5
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Comparative performance of HFC134a- and HCFC22-based vapour absorption refrigeration systems

A. K. Songara
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S. Srinivasa Murthy
2
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Cited by 16 publications

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“…Number of investigators have considered and reported data for R134a as refrigerant with different absorbents for VARS [4][5][6]. It was experimentally found that Dimethyl Acetamide (DMAC) was found to be a very promising solvent for HCFC22 in VARS applications, and felt that the performance of HCFC134a-DMAC solution in VARS should be investigated [7]. Hence this study is focused on the experimental investigations on R134a-DMAC based absorption refrigeration systems.…”
Section: Cfcmentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…Number of investigators have considered and reported data for R134a as refrigerant with different absorbents for VARS [4][5][6]. It was experimentally found that Dimethyl Acetamide (DMAC) was found to be a very promising solvent for HCFC22 in VARS applications, and felt that the performance of HCFC134a-DMAC solution in VARS should be investigated [7]. Hence this study is focused on the experimental investigations on R134a-DMAC based absorption refrigeration systems.…”
Section: Cfcmentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…Due to high ozone depletion potential the possibility of making refrigerants with chlorine and bromine was discarded. R134a is a refrigerant which is capable of producing cold at subezero temperatures and can be used even where ammonia cannot be used [3]. DMAC is a good absorbent of R134a.…”
Section: Introductionmentioning
confidence: 99%
“…Depending on the rectifier efficiency some amount of DMAC escapes to the condenser and results in residual liquid in State points as shown in Fig. 1 Greek letters 3 Void fraction m Dynamic viscosity (kg m À1 s À1 )…”
Section: Introductionmentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
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