Minimum Detectable Power of a Pyroelectric Thermal Receiver

A low-noise detection system using an InGaAs PIN photodiode for near-infrared spectroscopic measurement has been developed. The InGaAs PIN photodiode is more suitable than a Ge PIN photodiode for detecting low-level light in terms of dark current and quantum efficiency. The detection system consists of an InGaAs PIN photodiode with a charge integrating amplifier (InGaAs-CIA) operated at 77 K. A minimum detectable power of 10−16 W was achieved at a wavelength of 1.28 μm.

Download Full-text

Monolithic silicon-based photovoltaic-nanoplasmonic biosensor with enhanced limit of detection and minimum detectable power

Journal of Lightwave Technology ◽

10.1109/jlt.2021.3124474 ◽

2021 ◽

pp. 1-1

Author(s):

Ahmad Lotfiani ◽

Hamed Dehdashtijahromi ◽

Samaneh Hamedi

Keyword(s):

Limit Of Detection ◽

Detectable Power ◽

Minimum Detectable Power ◽

Silicon Based

Download Full-text

Life Estimation of Pressurized-Air Solar-Thermal Receiver Tubes

Journal of Solar Energy Engineering ◽

10.1115/1.4007686 ◽

2012 ◽

Vol 134 (4) ◽

Cited By ~ 14

Author(s):

David K. Fork ◽

John Fitch ◽

Shawn Ziaei ◽

Robert I. Jetter

Keyword(s):

Large Body ◽

Inelastic Strain ◽

Current Data ◽

Solar Thermal ◽

Estimation Methods ◽

Inlet Temperature ◽

Operational Conditions ◽

Thermal Receiver ◽

Cyclic Operation ◽

Strain Model

The operational conditions of the solar-thermal receiver for a Brayton cycle engine are challenging, and lack a large body of operational data unlike steam plants. We explore the receiver's fundamental element, a pressurized tube in time varying solar flux for a series of 30 yr service missions based on hypothetical power plant designs. We developed and compared two estimation methods to predict the receiver tube lifetime based on available creep life and fatigue data for alloy 617. We show that the choice of inelastic strain model and the level of conservatism applied through design rules will vary the lifetime predictions by orders of magnitude. Based on current data and methods, a turbine inlet temperature of 1120 K is a necessary 30-yr-life-design condition for our receiver. We also showed that even though the time at operating temperature is about three times longer for fossil fuel powered (steady) operation, the damage is always lower than cyclic operation using solar power.

Download Full-text

THz-Radiation Emitter and Receiver System Based on a 2 T Permanent Magnet, 1040 nm Compact Fiber Laser and Pyroelectric Thermal Receiver

Japanese Journal of Applied Physics ◽

10.1143/jjap.40.l1223 ◽

2001 ◽

Vol 40 (Part 2, No. 11B) ◽

pp. L1223-L1225 ◽

Cited By ~ 13

Author(s):

Hideyuki Ohtake ◽

Yuji Suzuki ◽

Nobuhiko Sarukura ◽

Shingo Ono ◽

Takeyo Tsukamoto ◽

...

Keyword(s):

Fiber Laser ◽

Permanent Magnet ◽

Thz Radiation ◽

Thermal Receiver ◽

Receiver System

Download Full-text

Numerical analysis of a hybrid tubular and cavity air receiver for solar thermal applications

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-01-2020-0006 ◽

2020 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Sayuj Sasidharan ◽

Pradip Dutta

Keyword(s):

Heat Transfer ◽

Natural Convection ◽

Numerical Analysis ◽

Heat Loss ◽

Solar Thermal ◽

Heat Transfer Analysis ◽

Receiver Design ◽

Radiation Emission ◽

Content Type ◽

Thermal Receiver

Purpose This paper aims to deal with characterisation of the thermal performance of a hybrid tubular and cavity solar thermal receiver. Design/methodology/approach The coupled optical-flow-thermal analysis is carried out on the proposed receiver design. Modelling is performed in two and three dimensions for estimating heat loss by natural convection for an upward-facing cavity. Heat loss obtained in two dimensions by solving coupled continuity, momentum and energy equation inside the cavity domain is compared with the loss obtained using an established Nusselt number correlation for realistic receiver performance prediction. Findings It is found that radiation emission from a heated cavity wall to the ambient is the dominant mode of heat loss from the receiver. The findings recommend that fluid flow path must be designed adjacent to the surface exposed to irradiation of concentrated flux to limit conduction heat loss. Research limitations/implications On-sun experimental tests need to be performed to validate the numerical study. Practical implications Numerical analysis of receivers provides guidelines for effective and efficient solar thermal receiver design. Social implications Pressurised air receivers designed from this method can be integrated with Brayton cycles using air or supercritical carbon-dioxide to run a turbine generating electricity using a solar heat source. Originality/value The present paper proposes a novel method for coupling the flux map from ray-tracing analysis and using it as a heat flux boundary condition for performing coupled flow and heat transfer analysis. This is achieved using affine transformation implemented using extrusion coupling tool from COMSOL Multiphysics software package. Cavity surface natural convection heat transfer coefficient is obtained locally based on the surface temperature distribution.

Download Full-text