Solar Water Heaters: Cylindrical Shell and Tube Type

Melikyan, Zohrab; Nranyan, Vahan

doi:10.1081/e-eee2-120050611

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…From this point of view developing of solar water heaters with low initial cost is a question of vital importance. The author of this article made efforts intended to solve the problem by developing very simple and cheap construction of a cylindrical shell-and-tube type solar water heater [9].…”

Section: Investigation Of Energy and Cost Effectiveness Of Simple Conmentioning

confidence: 99%

“…Using above values the water flow rate g w =0.0037kg/s of the solar heater was determined. To finding out required total length l m.tub (m), of cylindrical shell-and-tube in case of which t w.fin =43 o C is provided, by the help of (8) [9]. By data given above, the required lengths l m.tub of cylindrical solar water heater, were determined using (8), for different final required temperatures t w.fin of water.…”

Section: Energy Efficiency and Cost Effectiveness Of Cylindrical Shelmentioning

confidence: 99%

“…In order to determine the capital cost of cylindrical shell-and-tube type solar water heater which is necessary for energy and economic calculations, first should be found its required length l m.tub (m), which is possible to do by the help of following equation, obtained in [9] …”

Section: Energy Efficiency and Cost Effectiveness Of Cylindrical Shelmentioning

confidence: 99%

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Energy Efficiency and Cost Effectiveness of Solar Water Heaters

Melikyan¹

2015

IJEPE

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Abstract:There are different opinions on the question of energy and economic efficiency of solar water heaters. Some researchers believe in high effectiveness of solar water heater application while others questions their cost effectiveness. In this article detailed investigations have been accomplished to discover energy and economic real efficiency of different types of solar water heaters on the base of suggested procedure for their real payback periods determination. It's proved that flat type solar water heater has much longer payback than newly suggested cylindrical shell and tube type solar water heater.

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Section: Investigation Of Energy and Cost Effectiveness Of Simple Conmentioning

confidence: 99%

Section: Energy Efficiency and Cost Effectiveness Of Cylindrical Shelmentioning

confidence: 99%

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Energy Efficiency and Cost Effectiveness of Solar Water Heaters

Melikyan¹

2015

IJEPE

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“…One of the easiest ways to complete the required mass G mix.req , kg/s of gas mixture is the application of a solar air heater for heating outside air in quantity of ∆G mix.miss = 0.016 kg/s from temperature t out up to temperature t air.fin =30 o C for supplying it to the gas mixing chamber and completing the required mass of the mixture. For preparing and supplying ∆G mix.miss =0.016kg/s of warmed air, lately developed "Shell and tub type solar water heater" [3] is chosen, which is able to perform as solar air heater too. Assuming that the missed quantity of gas mixture mass ∆G mix.miss =0.016 kg/s is distributed by 10 parallel installed units of solar air heater, the quantity of air flow rate in each unit will make g air =G mix.miss /10 = 0.0016 kg/s.…”

Section: Figure 3 Thermodynamic Cycle Of Heat Pump On the Diagram "Imentioning

confidence: 99%

Heating and Cooling Hybrid System and Method for Its Calculation and Design

Melikyan¹

2014

IJEPE

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Abstract:In this article newly developed heating and cooling hybrid system is discussed. The system combines a heat pump, heating boiler and solar air heater. Low temperature source of heat pump is a gas mixture composed of waste warm gases, like inside used ventilation air, flue gases of heating boiler (smock), as well as outside air, heated in solar air heater. The evaporator of heat pump is installed in waste warm gases mixing chamber, aiming at avoiding the main disadvantage of ordinary air sourced heat pump, in case of which the evaporator surface in wintertime is covered with ice crust that obstructs movement of air through the evaporator of heat pump. To solve the problem it is suggested to create a mixture of waste warm gases gathered in a gas mixing chamber and serving as heat source. A method for calculation and design of the new system was developed for both winter heating and summer cooling of a building. The energy and economic investigation based on mathematical model proved rather high cost effectiveness and energy efficiency of developed heating and cooling hybrid system.

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Developing of a ventilation system for residential houses with solar air heater

Melikyan

Egnatosyan

2019

E3S Web Conf.

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Ventilation of buildings in winter period, especially in cold climatic conditions, requires rather big quantity of heat for preheating the ventilation fresh air. Consequently, an average low-income family pays a tangible cost for ventilation of apartments. To provide low cost ventilation of houses it is becoming attractive the use of solar energy for preheating the outside fresh air, before its supplying into the house. For this purpose, cheap solar air heaters are needed. To solve this problem a simple and cheap construction of solar air heater was developed, which is the main part of the ventilation system. The system consists of air heating solar collectors, installed on the roof of the house, warm air distribution ductwork, internal air circulation ducts and air-circulating fan. In summer period, the system is used only during nighttime period for circulating outside colder air through the internal space of the house. Such operation allows cooling internal air and as well the constructions of the house. As a result, the house accumulates nighttime natural cold for using it at daytime cooling purposes. Presentation includes the scheme, explanation of operation and method for design of suggested ventilation system. Analysis proved the energy efficiency and cost effectiveness of the new system.

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Solar Water Heaters: Cylindrical Shell and Tube Type

Cited by 3 publications

References 1 publication

Energy Efficiency and Cost Effectiveness of Solar Water Heaters

Energy Efficiency and Cost Effectiveness of Solar Water Heaters

Heating and Cooling Hybrid System and Method for Its Calculation and Design

Developing of a ventilation system for residential houses with solar air heater

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