Performance evaluation of a solar assisted heat pump drying system
Performance evaluation of a solar assisted heat pump drying system
... compressor, solar irradiation and storage volume Evaluation of a rice drying system using a solar assisted heat pump was carried out by Best et al [27] They developed a combined solar assisted- heat pump ... et al [44] studied the economic performance of a solar system, air-to-air heat pumps, and several solar- assisted heat pump systems for residential heating They concluded that the air-to-air heat ... such as water heating, and space heating and cooling Morgan [19] investigated a direct expansion solar assisted heat pump using R-11 The heat pump was specially designed for use in a tropical climate,...
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A SOLAR ASSISTED HEAT PUMP SYSTEM FOR DESALINATION
... without any insulation was first used in a heat pump system by Franklin et al.[7] Hawlader et al.[4] performed analytical and experimental studies on a solar Page A SOLAR ASSISTED HEAT PUMP FOR DESALINATION ... ratio of air kg/kg Subscript a Air c Collector i Inlet o Outlet Page xxi A SOLAR ASSISTED HEAT PUMP FOR DESALINATION r Refrigerant v Vapor w Water Page xxii A SOLAR ASSISTED HEAT PUMP FOR DESALINATION ... heat pump desalination system The system consists of a solar assisted heat pump, a distillation chamber, and a solar water preheating unit The heat pump used an unglazed, serpentine tube solar...
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Báo cáo y học: "In vitro and in vivo evaluation of a new active heat moisture exchange" potx
... Performer and the Hygrobac had significantly higher airway temperature and AH than did the Hygroster (Fig 5) Active Performer, regardless of the level of heating, always had a higher temperature and AH ... inspiratory flow; VT = tidal volume Statistical analysis All data are expressed as mean ± standard deviation For the in vitro study, we compared the three HMEs using a one-way analysis of variance ... evaporation In the present study we assessed the efficiency and stability of this new active moisture exchanger in delivering heat and moisture to inspired gases, as compared with widely used heat and moisture...
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báo cáo hóa học:" Research Article Performance Evaluation of UML2-Modeled Embedded Streaming Applications with System-Level Simulation" pdf
... models and successfully adopts it for embedded RTES performance evaluation Performance Metamodel for Streaming Data Embedded Systems The foundations of the performance metamodel defined in this ... accurate performance evaluation for RTES Conclusions and Future Work This article presented an efficient method to model and evaluate streaming data embedded system performance with UML2 and system-level ... architectures,” EURASIP Journal of Embedded Systems, vol 2007, Article ID 82123, 11 pages, 2007 [18] S Balsamo and M Marzolla, Performance evaluation of UML software architectures with multiclass queueing...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 6
... 18.50% 6. 51% 6. 64% PE 0l/s PE 10l/s PE 20l/s Figure 6. 19 Draft rating at neck/ear region of Infected Manikin with DV 6. 5 Key Findings The Infected Manikin keeps exhaling the tracer ... Manikin from inhaling contaminated air from the Infected Manikin sitting opposite After switching on the top-PE for infected manikin while switching off the PV for healthy manikin, a more than ... bring more amount of contaminated air to the Healthy manikin due to the pulling and suction effect of the PV-PE system for Healthy Manikin Considering now the cases in Figure 6. 10 and Figure 6. 11...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 7
... background ventilation system on the flow pattern of the indoor air, thus influencing the concentration of exhaled contaminated air at the breathing zone of HP; it is useful to compare the iF of the ... are infected or not before the Infected Person is diagnosed and is moved to an isolation room, so the effectiveness of ventilation system in removing the exhaled infectious air in the consulting ... concentration of exhaled air is measured at the breathing zone of HP, thus the change of iF over the half hour of the three cases when no PE is used is shown in Figure 7. 10 In general, the iFs in the...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 8
... trend of iF changes in Figures 8. 7 and 8. 8, a higher flow rate is required with DV to achieve the same iF The flow rate to be applied in the real healthcare settings can be chosen according to ... supply air diffusers involved in this study are all complex including two perforated openings and one four way diffuser, which has been introduced in Chapter Most frequently used methods for openings ... PE flow rate (l/s) Mixing ventilation Top-PE Mixing ventilation Top-PE 20 Mixing ventilation Shoulder-PE 20 Comparison of simulated and measured Intake Fraction (iF) and Personalized Exposure...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 9
... exposure is when HP is standing, facing the seated IP In the context of airborne infection control in healthcare settings, this novel PV-PE system is developed to help with the ventilation design which ... systems in terms of the localized extraction of the contaminated exhaled air from an Infected Person in healthcare settings Three scenarios were considered for this objective, as shown below: a Infected ... than top-PE in terms of increasing the PV air in the inhaled air • The above-mentioned conclusions imply that when a Healthy Person is working in a consultation room or a health care setting room,...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 1
... not independent of, but based on, previous research on PV system, local exhaust system in the field of reducing the transmission of infectious air in indoor environments, ventilation in healthcare ... control of the combined PV-PE system in conjunction with background MV or DV systems in terms of the localized extraction of the contaminated exhaled air from an Infected Person in healthcare settings ... 2 010 , 2 011 ; Zítek et al 2 010 ) So far no study has evaluated the combination of PV and LEV in healthcare settings In the field of ventilation design in healthcare centers and hospitals, a lot of studies...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 2
... uniformly maintained at 23 .5 °C Yang et (20 10) al 21 °C; 23 .5°C; 26 °C 26 °C ; 23 .5°C The use of PV with ceiling mounted ATD in conjunction with mixing ventilation at room air temperature of 26 °C will ... which will be inhaled again 2. 1.4 Study of temperature combination of PV supply air and background air According to American Society of Heating, Refrigerating, and Airconditioning Engineers (ASHRAE ... system in which the space is typically maintained at 23 °C Gong et al 21 °C; (20 05, 20 06) 23 .5 °C; 26 °C 23 .5 °C; 26 °C Air movement is preferred even when the room air temperature is below 26 ...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 3
... The air- conditioning systems in Indoor Environmental Chamber are shown in Figure 3. 3 Figure 3. 3 Schematic layout of Indoor Environmental Chamber and its air- conditioning system 3. 2.1.2 Breathing ... heights of 1.2 m, 0. 03 m away from the Infected Manikin’s face, as shown at the juncture of F5 in Figure 3. 18 Figure 3. 19 Set up of the DANTEC instrument 3. 3.4 Evaluation of the novel PV-PE system in ... up of the DANTEC instrument for room air velocity and Draft Rating b) Set up of the DANTEC instrumentfor local air velocity and Draft Rating Figure 3. 14 Set up of the DANTEC instrument 3. 3 .3 Evaluation...
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Performance evaluation of personalized ventilation personalized exhaust (PV PE) system in air conditioned healthcare settings 4
... Comparison of iF at different Gauge pressure of PE Figure 4. 16 Air streamlines showing exhaled air from Infected Manikin 4. 3 Pilot study II - Evaluation of different Personalized Exhaust devices ... examined the feasibility of Personalized Ventilation Personalized Exhaust (PV- PE) system and supports the idea of supplying more fresh air to a person as well as to exhaust the exhaled contaminated ... -50 16 -10; -30; -50 In order to evaluate the ability of personalized exhaust (PE) system in preventing the spread of contaminated air exhaled by infected people, another set of CFD simulation was...
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Finite time exergoeconomic performance optimization of a thermoacoustic heat engine
... Ceperly P H Gain and efficiency of a traveling wave heat engine J Acoust.Soc Am., 1982, 7(3): 1239-1243 [3] Yazaki T, Iwata A, mackawa T and Tominaga A Traveling wave thermoacoustic engine in a looped ... / F1 and FT = F1 + F2 Here, the total heat transfer surface area FT of the two heat exchangers is assumed to be a constant (3) There is a constant rate of heat leakage ( q ) from the heat source ... i is a complex heat transfer exponent, k1 is the overall heat transfer coefficient and F1 is the total heat transfer surface area of the hot-side heat exchanger, k2 is the overall heat transfer...
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Thermal evaluation of a sun tracking solar cooker
... double-glazed solar cooker, Kumar [7] One of the earliest mathematical models to test the thermal performance of a Solar Cooker was presented by Garg et al [8] and Vaishya et al [9] Also, Jubran and Alsaad ... concentrating/oven type solar cooker, and the parameters that characterize the performance of the solar cooker Evaluation of solar cooker thermal performance using different insulating materials was conducted ... show the solar cooker installed on a horizontal sun tracking system It shows the base, motor and bearing and sun cooker Figure The tracking system of the solar cooker The important parts of a hot...
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Báo cáo hóa học: " Improvement on thermal performance of a diskshaped miniature heat pipe with nanofluid" docx
... Investigation on convective heat transfer and flow features of nanofluids J Heat Tran 2003, 125:151-155 Wei WC, Tsai SH, Yang SY, Kang SW: Effect of nanofluid on heat pipe thermal performance In ... thermal resistance at each heat load could be calculated by the same process The thermal resistances were averaged for all heat loads to be an averaged thermal resistance (Rav) at each charge volume ... a greater viscosity of the nanofluid The measured values of the thermal conductivity of nanofluids and DI water are also listed in Table The thermal conductivity of nanofluid with gold nanoparticles...
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