Energies | Free Full-Text | Experimental Study on the Heat Pump …
In this study, we proposed and experimentally investigated a novel solar-assisted heat pump (SAHP) system integrated with a dual-purpose solar collector …
Experimental and numerical investigation on a solar direct-expansion heat pump system employing PV/T & solar thermal collector …
A novel PVT-TC system coupled with a solar direct-expansion heat pump system. • An experimental study was conducted to analyze the performance of the novel system. • The average COP of the PVT-TC solar heat pump system was obtained to be 6.11 •
Annual comparative performance of direct expansion solar-assisted and air-source heat pumps for residential water heating
In Fig. 1 in the previous section, the schematic diagram basically consists of an unglazed flat-plate solar thermal collector with the given specification in Table 1 and a rotary type electric compressor as well as a hot water storage tank with an immersion coil and a thermostatic expansion valve. ...
Experimental and numerical investigation on a solar direct-expansion heat pump system employing PV/T & solar thermal collector …
DOI: 10.1016/j.energy.2022.124312 Corpus ID: 248976554 Experimental and numerical investigation on a solar direct-expansion heat pump system employing PV/T & solar thermal collector as evaporator @article{Abbas2022ExperimentalAN, title={Experimental ...
Investigation on a direct-expansion solar-assisted heat pump with a novel hybrid compound parabolic concentrator/photovoltaic/fin evaporator ...
Especially in a direct-expansion solar-assisted heat pump (DX-SAHP), the evaporator and the collector are integrated, and the refrigerant directly flows below the absorber plate absorbing a large amount of heat and provides a low temperature [9].
Experimental investigation on a direct-expansion solar-assisted …
A direct-expansion solar-assisted heat pump using R290 was studied experimentally. • A micro-channel collector/evaporator and a micro-channel condenser were employed. • The micro-channel heat exchanger could help reduce system refrigerant charge. • A series
ThermoPower™ 30 Tube Vacuum Direct Flow Solar Collector
Specifications: Weight: 170 lbs (without crating) Dimensions: 1.65 in H x 2.22 in W Packaging: Ships via freight on pallet or available for local pickup (1 pallet is available for residential or commercial delivery) Assembly Time: A single collector can be assembled in 1.
Mathematical Thermal Modelling of a Direct-Expansion Solar …
Energies 2018, 11, 1773 3 of 27 In relation to the effect of heat convection on the surface of the collectors, Zhu et al. [9] conducted an experiment where they evaluated the seasonal performance of a Heat Pump (HP) using three different types of collectors. They
Experimental performance analysis and optimization of a direct expansion solar-assisted heat pump water heater
Nomenclature A c solar collector/evaporator area, m 2 COP coefficient of performance C Pw specific heat at constant pressure of water, kJ/kg K D outside diameter of the tube, m E ˙ Q w exergy rate of hot water, kW E ˙ rad exergy rate of solar radiation, kW e
Theoretical model and experimental validation of a direct-expansion solar assisted heat pump for domestic hot water applications
The direct-expansion solar assisted heat pump (DXSAHP) replaces the conventional evaporator built in a finned tube exchanger using a bare flat-plate collector array where the refrigerant evaporates after expansion. This …
Dynamic Performance Study on the Solar Collector/Evaporator of Direct Expansion Solar …
A dynamic simulation model is developed for predicting performance of the solar collector/evaporator of direct expansion solar assisted heat pump systems. In this model, the absorber plate temperature is calculated by an …
Energy, financial and environmental impact analysis of solar thermal heat pump systems using a direct expansion packed bed evaporator-collector ...
The COP of a solar thermal heat pump system using direct expansion packed bed evaporator-collectors was improved by 1–9.5% compared to the direct expansion flat plate evaporator-collector during 14.00 h.
Experimental performance analysis and optimization of a direct expansion solar-assisted heat pump water heater
In this study, a direct expansion solar-assisted heat pump water heater (DX-SAHPWH) with rated input power 750 ... Studies of heat pumps using direct expansion type solar collectors J Solar Energy Eng, 127 (2) (2005), pp. 60-64 CrossRef View in …
Numerical study of a direct-expansion solar-assisted heat pump water heater under frosting conditions based on experiments
A direct-expansion solar-assisted heat pump (DX-SAHP) water heater is studied numerically. A simulation model, which includes the models of components and the frost formation of the collector/evaporator, is established to research the heating performance of the ...
Recent progress in solar water heaters and solar collectors: A comprehensive review
Shukla et al. [234] discussed the SWH systems in detail to different solar collectors g. 2 shows the top 12 countries such as China, Turkey, U.S, Germany, Brazil, and India, etc., using an SWH system and the rest of …
Study on performance of direct-expansion heat pump water …
In this paper, a direct-expansion heat pump water heater system integrated uninsulated micro-channel PV/T solar collector (UMC-PVT-SC) is proposed. This system can realize …
Experimental validation of a theoretical model for a direct-expansion solar-assisted heat pump applied to heating
The DXSAHP (direct-expansion solar-assisted heat pump) replaces the heat exchanger of a finned pipe with solar collectors, which, in contrast to conventional evaporators, absorb solar radiation. It is interesting to consider the comparison Sushil makes between the collector and the standard outdoor fan-coil units, and significant …
In this paper, dynamic simulation studies on the solar collector/evaporator of the direct expansion solar assisted heat pump system are presented. Based on the above …
Direct expansion solar heat pumps for residential applications
The solar collector, which can be based either on a solar thermal unit alone or a photovoltaic-thermal (PVT) panel, is defined by the research group as the …
Theoretical model and experimental validation of a direct-expansion solar assisted heat pump for domestic hot water applications
1. Introduction Solar systems for domestic hot water (DHW) generation are an alternative to reduce energy dependence on conventional fuels and pollution emission. In efforts to comply with the requirements of the Kyoto protocol [1] and Copenhagen Conference on Climate Change [2] many countries are forced to use solar radiation as an …
Recent advancements in solar collector-evaporator for direct …
Direct expansion solar heat pump system provides sustainable water heating solutions. Roll bonds, flat plates, and finned tube collectors can harness solar and ambient thermal energy. PVT with CPC, LFPV, and PV-SHP-HP collectors can generate …
Structural optimization of collector/evaporator of direct-expansion solar…
In a Direct Expansion Solar Assisted Heat Pump (DX-SAHP), a valuable part of the energy is provided from solar radiation. The solar radiation can fluctuate during the day affecting the performance ...
Numerical simulation of a collector/evaporator for direct-expansion solar …
The objective of the present research work is to realize a numerical analysis of a solar flat plate collector/evaporator, which is a component of a direct expansion solar assisted heat pump (DX-SAHP) system, using computational fluid dynamics. The copper collector/evaporator employed refrigerant R600a as the working …
Parabolic Trough Solar Collectors (Ultimate Guide)
In this ultimate guide, we''ll take you on a journey to discover the ins and outs of parabolic trough solar collectors. We''ll explore the advantages and disadvantages of this cutting-edge technology, how it works, and the various ways it can be applied. What is a
All-weather characteristic studies of a direct expansion solar integrated air source heat pump system based on PCMs
A solar regenerator filled with desirable PCMs and flat-plate heat pipe was exploited. • A direct expansion solar integrated air source heat pump system was investigated. • The system allows all-weather operation by combining or switching evaporators. • Optimize
Experimental performance analysis on a direct-expansion solar-assisted heat pump water heater
A direct expansion solar assisted heat pump water heater (DX-SAHPWH) experimental set-up is introduced and analyzed. This DX-SAHPWH system mainly consists of 4.20 m 2 direct expansion type collector/evaporator, R-22 rotary-type hermetic compressor with rated input power 0.75 kW, 150 L water tank with immersed 60 m …
Numerical simulation of a collector/evaporator for direct …
Abstract: The objective of the present research work is to realize a numerical analysis of a solar flat plate collector/evaporator, which is a component of a …
Dynamic Performance Study on the Solar Collector/Evaporator of …
A dynamic simulation model is developed for predicting performance of the solar collector/evaporator of direct expansion solar assisted heat pump systems. In this …
Thermodynamic investigation of a direct-expansion solar assisted heat pump with evacuated tube collector-evaporator
Direct-expansion solar assisted heat pump (DX-SAHP) is a solar thermal conversion technology. ... Specification Evacuated tube collector-evaporator ZKJRQ10 The effective heat collection area: 1.5 m 2; glass …
Dynamic performance study on the solar collector/evaporator of …
A dynamic simulation model is developed for predicting performance of the solar collector/evaporator of direct expansion solar assisted heat pump systems. In this …
Modeling evaluation of a direct-expansion solar-assisted heat pump water heater using R410A
A direct-expansion solar-assisted heat pump (DX-SAHP) system by using R410A as refrigerant is described, which can supply domestic hot water during the whole year. Based on the distributed parameter and homogeneous flow models of collector/evaporator and ...
Studies of Heat Pumps Using Direct Expansion Type Solar Collectors
An aluminum roll-bond panel with a photovoltaic module on the surface was developed recently for use as an evaporator of a heat pump for residential hot water supply and room heating [Proceedings of the JSES/JWEA Joint Conference, Okinawa, pp. 305–308 (in Japanese)]. In the present study, the panel was modified to reduce the large pressure …
Structural optimization of collector/evaporator of direct-expansion solar…
This paper presents the development of a mathematical model for a direct-expansion solar-assisted heat pump (DX-SAHP) operating in steady-state. The mathematical model was ...
