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Flate Plate Collector with Variable Speed Pump
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The new flat plate solar collector model allows the user the option of specifying the flow rate into the collector and having the collector calculate
the outlet temperature, or specifying the desired collector outlet temperature (along with the minimum and maximum possible flow rates) and having
the model calculate the flow rate. In this model, the efficiency is a function of the inlet temperature minus the ambient temperature. The model
interacts nicely with the new variable speed model in the HVAC component library in order to calculate the pump power consumption correctly.
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Flate Plate Collector with Capacitance Effects
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This new model gives all the flexibility of the model described above plus it considers the effects of the fluid mass and collector mass on the
performance of the system. The mass effects are handled by dividing the collector into nodes along the flow direction and then solving the
resulting differential equations (resulting from the energy balance on the collector node). The user has the option of specifying whether the
collector efficiency equation is based on the inlet temperature or the collector average temperature.
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Evacuated Tube Collector Model with Variable Speed Pump Option
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This model is very similar in operation to the flat plate collector model described above (without mass effects) except the incidence angle
modifiers are interpolated from a data file of 2-dimensional values instead of on the simple ASHRAE approach. A sample data file is included with
the model. This model also includes the variable speed pump option to keep the outlet temperature at a user-specified value.
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Linear Parabolic Concentrator Model
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This component models the popular linear parabolic concentrator type collectors; a solar collector used to concentrate solar radiation, that are not
found in the standard TRNSYS library. The basic system design is a reflective parabolic trough (aperture) which reflects the solar radiation onto a
cylindrical absorber tube (receiver).
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Integral Collector Storage Model
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This component models a rectangular integral collector storage (ICS) solar collector. In these systems, the storage fluid is kept in an enclosure
located directly beneath the collector. This model is based on a research project between TESS and the National Renewable Energy Laboratory. The
model combines a detailed solar collector model with a detailed storage tank model.
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Integral Collector Storage Model With Immersed Heat Exchanger
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This component models a rectangular integral collector storage (ICS) solar collector with an immersed heat exchanger in the storage tank. This
model is a subset of the previous ICS model and features the natural convection heat exchange between the immersed heat exchanger and the storage
fluid. This version allows the user to specify a serpentine tube heat exchanger (user-specified heat exchanger path through the storage).
Additional models for horizontal and vertical tube banks, and coiled heat exchangers are available for a small upgrade fee.
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Single Cover Top Loss Model
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This component evaluates the convective and IR radiative losses from a system consisting of a plate at known temperature and a single transparent
cover. The user specifies physical cover properties such as transmittance and emissivity and ambient conditions such as temperature and wind
speed.
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Double Cover Top Loss Model
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This component evaluates the convective and IR radiative losses from a system consisting of a plate at known temperature and two parallel
transparent covers. The user specifies physical cover properties such as transmittance and emissivity and ambient conditions such as temperature and
wind speed.
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Tubular Integral Collector Storage (ICS) System
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This component is intended to model an integral collector storage system; a solar collector design where the collector and storage sections of a
typical solar domestic hot water system are combined into one unit. The model is intended to be applied to ICS systems that store fluid in
several tubes that are connected in series and placed within a collector enclosure.
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Unglazed Flat Plate Collector (efficiency coefficient method)
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This component models an unglazed flat plate solar collector where the collector efficiency coefficients are known. This model relies on algorithms
supplied by the solar collector text: Solar Engineering of Thermal Processes by Duffie and Beckman.
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Theoretical Unglazed Flat Plate Collector
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This component models an unglazed flat plate solar collector where the collector efficiency coefficients are calculated from theoretical models.
This model relies on algorithms supplied by the solar collector text: Solar Engineering of Thermal Processes by Duffie and Beckman.
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Unglazed Air Heating Collector
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This component is intended to model an un-glazed solar collector that passes air behind the absorbing plate. Moist air calculations are not
included in the model. The thermal model of this collector relies on algorithms supplied by the classic Solar Engineering of Thermal Processes
textbook by Duffie and Beckman.
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Theoretical Fin/Tube Solar Collector (Pool Heater)
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This component models a tube-fin solar collector based on algorithms presented by Duffie and Beckman in chapter 6 of their book Solar Engineering
of Thermal Processes.
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Theoretical Serpentine Tube Solar Collector
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This component models a serpentine tube-fin solar collector based on algorithms presented by Duffie and Beckman in chapter 6 of their book Solar
Engineering of Thermal Processes.
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