Heat pipe heat exchanger (HPHX) is an excellent device used for heat recovery in air conditioning systems. The Energy Conservation Building Code (ECBC) – Bureau of Energy Efficiency (BEE) India classifies Indian climatic zones into five categories viz., Hot and Dry (e.g. Ahmedabad, Jodhpur etc), Warm and Humid (e.g. Mumbai, Chennai etc), Composite (e.g. Nagpur, Jaipur etc), Cold (e.g. Guwahati etc) and Temperate (e.g. Bengaluru etc). The literature review indicated that very limited information is available on annual energy saving analysis of air conditioning system with HPHX for Indian climatic zones. The paper investigates the possible energy savings using HPHX for heat recovery in air conditioning system for Indian climatic zones. The analysis is carried out for total 25 Indian cities representing different climatic zones. The analysis is performed for a 6 row HPHX and assuming outdoor air quantity as 1 m3/s, return air dry bulb temperature as 23 °C and compressor power as 1 kW/TR. This paper discusses the use of HPHX only for the heat recovery application (exchange of sensible heat between fresh outdoor air and conditioned return air). The annual energy savings with HPHX for a particular city is calculated for number of hours when outdoor air dry bulb temperature exceeds 25 °C. The maximum energy saving potential is revealed for hot and dry, warm and humid and composite Indian climatic zones.

Mandar Madhukar Lele

School of Mechanical Engineering

Engineering and Technology

Jadhav, TS

Fulltext

MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

Engineering Science and Technology, an International Journal, Elsevier

Cleanroom air conditioning plays a significant role in applications starting from food and beverages, health care, pharmaceutical, optics, bio safety, semiconductor and electronics applications. It also plays a key role in special applications for sector like defense, research and space technology. The present paper discusses the important aspects to be taken into considerations during air conditioning for cleanrooms. In addition to control of temperature and humidity, cleanroom air conditioning also involves control of air borne particles, air flow pattern, room pressurization, etc. The paper also addresses important issues such as energy conservation and cleanroom performance testing. The present study gives an insight towards efficient designing of cleanroom air conditioning.

International Journal of Current Engineering and Technology, InPressco

Air Conditioning for Cleanroom Applications-A Review

The literature review indicates that, though water has a good figure of merit, very limited information is available on the use of water as the working fluid in a horizontal heat pipe heat exchanger for air conditioning applications. This article investigates theoretical and experimental analyses of horizontal heat pipe heat exchangers for air conditioning applications using distilled water as the working fluid. This heat pipe heat exchanger study consists of 20 copper tubes of 9.5 mm outside diameter arranged in two rows with a 0.3 m evaporator length, a 0.3 m condenser length, a 0.05 m adiabatic length, and 12 fins per inch of aluminum plate fins. A comparative analysis is studied for two configurations of heat pipe heat exchangers. The first configuration of heat pipe heat exchanger consists of a single wick structure with two layers of 180 mesh of phosphor bronze wire mesh, and, in the second configuration, the heat pipe heat exchanger consists of a composite wick structure (two layers of 180 mesh and two layers of 60 mesh of phosphor bronze wire mesh). The investigations are performed only for sensible heat recovery between outdoor and return air. The experimental investigations are performed by varying the outdoor air dry bulb temperature in the range of 24°C to 40°C and return air dry bulb temperature in the range of 20°C to 24°C. The present study reveals that the amount of heat recovered by a heat pipe heat exchanger with a composite wick structure is 56% better than a heat pipe heat exchanger with a single wick structure at a higher velocity of 2.4 m/s and further improves to 88% at a lower velocity of 0.6 m/s.

Science and Technology for the Built Environment, Taylor & Francis

Theoretical and experimental investigations on horizontal heat pipe heat exchangers using a composite wick structure for heat recovery in air-conditioning systems

The three HPHX (heat pipe heat exchanger) configurations in the present investigation include HPHX with single wick structure (HPHX 1), HPHX with composite wick structure (HPHX 2) and hybrid HPHX (HPHX 3) which is the combination of HPHX 1 and HPHX 2. The experimental correlations obtained are used for investigating annual energy savings in air conditioning using HPHX integrated with and without evaporative cooling, for Indian climatic zones. A representative city for each Indian climatic zone is selected for the analysis involving sensible heat recovery between outdoor air and conditioned return air. The investigation reveals that for HPHX without evaporative cooling, HPHX 1 becomes favourable choice for cities such as Bengaluru (representing temperate Indian climatic zone), Chennai (warm and humid Indian climatic zone) and Guwahati (cold Indian climatic zone). For cities such as Ahmedabad (hot and dry Indian climatic zone), Gwalior (composite Indian climatic zone) and Chennai, the use of HPHX integrated with evaporative cooling is found more promising for HPHX 3 followed by HPHX 2, whereas for cities such as Bengaluru and Guwahati, HPHX 1 becomes the popular choice. The present research gives an insight towards the performance and selection of HPHX with different configurations, for Indian climatic zone.

Energy, Pergamon

Analysis of annual energy savings in air conditioning using different heat pipe heat exchanger configurations integrated with and without evaporative cooling

Theoretical energy saving analysis of air conditioning system using heat pipe heat exchanger for Indian climatic zones

Gaming Law Review and Economics

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Energy and Buildings

The application of heat pipe heat exchangers to improve the air quality and reduce the energy consumption of the air conditioning system in a hospital ward—A full year model simulation

Journal of Mechanical Science and Technology

Predicting yearly energy recovery and dehumidification enhancement with a heat pipe heat exchanger using typical meteorological year data in the tropics

Applied Thermal Engineering

A review on the application of horizontal heat pipe heat exchangers in air conditioning systems in the tropics

Journal	Data powered by TypesetEngineering Science and Technology, an International Journal, Elsevier
Publisher	Data powered by TypesetElsevier
ISSN	22150986
Open Access	No