D.B. Jani

Gujarat Technological University | GTU · Mechanical Engineering

Use of desiccant-based dehumidification and cooling can save substantial electrical energy required to condition indoor space. Solar regenerated desiccant systems will cost less to operate as compared to conventional vapour compression-based refrigeration systems. The solar powered desiccant assisted innovative cooling systems are feasible and favo...

Using desiccants—adsorbents or materials with a natural affinity for water—the desiccant dehumidification and cooling method is a creative way to achieve dry air. When more moisture is released by the indoor air due to large human occupancy, a desiccant can absorb it without changing in size or form. In other words, when a moist air-stream passes t...

These days, supply chain strategies are the foundation of any business. By implementing supply chain management, businesses can lower expenses, share information more easily, maintain a high level of market sensitivity, and effectively handle market uncertainty. The effectiveness of cold chain logistics circulation is influenced by the safety mecha...

Greenhouse gas emissions and rising consumption of power resulting from extended use of the HVAC systems for producing indoor thermal comfort can be one of the most important challenges of the next decade, where energy consumption rates in HVAC systems reached 40-45% of energy consumption in commercial and residential buildings. Therefore, performa...

A green building is an environmentally sustainable structure, which makes efficient use of land, materials, energy and water while costing less in terms of maintenance charges. A green building enhances energy efficiency, self-sustain in terms of energy production, promotes use of renewable energy, limits water consumption, and makes maximum use of...

The phrase “Internet of Things” (IoT) alludes to the billions of physical devices connected to the Internet in order to exchange raw data and analyze the information. By collecting data from these devices and analyzing them, IoT makes the devices smarter, and the processes more efficient. IoT can bring endless opportunities to every aspect of our l...

Desiccant Evaporative Cooling (DEC) systems can be used in hot and humid climates to enhance the performance of evaporative cooling systems. DEC systems combine desiccant and fan pad systems to address the temperature gradient issues of conventional evaporative systems. This article discusses some ways that DEC systems can improve evaporative cooli...

Inaugural Session of ICSSR Conference on India Towards Viksit Bharat@2047

The world is transforming quickly especially in field of higher and technical education, with it, the requirement for universal access to top-notch higher and advanced technical education course. The present shift toward higher quality improvement is the most effective way of developing and maximizing our country's vast talent pool of young in tech...

Desiccant packs are commonly used in the parcels that are used in import and export industry during cargo or shipping to control moisture-and protect goods from damage. These packs, which can contain materials such as clay, silica gel, or calcium chloride, help maintain a dry environment inside the packaging, preventing issues like mildew, mold, ru...

A solid desiccant-based novel dehumidification technique in indoor cooling is a viable substitute for a traditional dehumidification system in regions with high humidity levels. The ozone layer is being steadily destroyed by vapour compression-based conventional dehumidification systems, which also have a number of other disadvantages such as exces...

In industrial fluid handling, the evolution of pumping and valve technologies stands as a cornerstone for optimizing efficiency, reducing energy consumption, better fluid control and enhancing overall system performance. The latest innovations in advanced pumping and valve technologies have revolutionized how fluids are transported, ensuring precis...

Energy consumption in both residential and commercial buildings is increasing day by day due to rapid increase in population and urbanization. It is reported that 30-40% of total primary energy of the world is utilized in buildings. Therefore, to invest for energy reduction, building sector is highly attractive. However, Heating, Ventilation and Ai...

This chapter recalls the operational principles of desiccant cooling systems and discusses the recent progress of these systems and their technological advancements in recent years. Such systems are particularly advantageous for integration with solar-powered systems since they employ a natural working fluid and can be reactivated by low-grade ther...

Improving the cold storages and post-harvest infrastructure in agriculture sector will significantly reduce waste, create a surplus for exports, and enhance the income of farmers. This will also go a long way in achieving the Sustainable Development Goal of zero hunger, which aims to end all forms of hunger and malnutrition and double the agricultu...

High humidity level of the indoor moist air has adverse effect on human health. Its major threat is observed as sensory irritation in eyes and respiratory systems. Again, due to drastic reduction in humidity, sometimes because of overcooling the Indoor Air Quality (IAQ) becomes worse. This overview has reviewed many literatures stating desiccant-ba...

The traditional vapour compression and absorption cooling systems can be replaced successfully by desiccant assisted dehumidification and cooling systems, which are heat-driven cooling devices. A rotating dehumidifier, also known as a desiccant wheel, is used to dehumidify moist process air as a main part of a desiccant assisted dehumidification an...

The cryogenic vessel is mainly a double-walled vessel which mainly consists inner vessel, outer vessel, and inner support. The Inner support is the main part designing of the cryogenic vessel for thermal and structural criteria. Inner support material for cryogenic vessels can be made of various materials depending on Net evaporation rate (NER) cri...

This large number of polymer products are formed into their final shape by polymerization in situ. In particular, mould curing process is the final step in many rubber products manufacturing and determines both the quality of the resulting product as well as productions costs. During this process, important changes in the mechanical properties-e.g....

This manuscript presents an exhaustive examination of the spheroidizing annealing heat treatment process, emphasizing its principles, methodologies, industrial applications, and recent advancements. Spheroidizing annealing stands as a pivotal heat treatment methodology extensively utilized in metallurgy to augment the machinability, formability, an...

A refrigeration plant consists of various components that are equally important to maintain high performance levels. In many larger systems, one of those components is the cooling tower, which is used to reject heat from the condensers in a plant into the atmosphere. Cooling towers can be found in various applications, mainly in industrial processe...

The cryogenic vessel is mainly a double-walled vessel which mainly consists inner vessel, outer vessel, and inner support. The Inner support is the main part designing of the cryogenic vessel for thermal and structural criteria. Inner support material for cryogenic vessels can be made of various materials depending on Net evaporation rate (NER) cri...

Numerical algorithms and computer programs have been developed to determine optimal cure steps in a tire curing process. A dynamic constrained optimization problem was formulated with the following ingredients: (1) an objective function that measures product quality in terms of final state of cure and temperature history at selected points in a tir...

Large commercial buildings, namely supermarkets or restaurants, require large capacity air conditioning units to maintain an indoor thermally comfortable environment with large amount of ventilated fresh air for their customers and employees to grow their business. These air conditioning units control, not only the indoor temperature, but also exce...

Due to its sustainable cooling design and inexpensive operation, desiccant-based hybrid cooling systems have been popular in recent years especially for hot and humid climatic zones. In general, the desiccantbased hybrid cooling is used in conjunction with conventional cooling – so as to enable the use of the technique in a wider variety of climate...

Solar cooling can be used for different applications such as for cold rooms in rural areas to store agriculture goods, for warehouses, food production or industrial use, producing solar cooling power is a sustainable, scalable solution. Using solar for cooling is much simpler than it might appear as compared to the most common, robust and competiti...

Eco-friendly and cost effective solar cart sustainable and having zero carbon emission and reduce dependency on fossile fuels.

The optimization problem was solved using the complex algorithm along with a finit element model solver. Numerical simulations were carried out to demonstrate the procedure of determining optimal cure steps for a truck/bursa dial tire. © 1999 John Wiley & Sons, Inc. J App Poly m Sci 74: 2063–2071, 1999 dynamic constrained optimization problem was fo...

The cryogenic vessel is mainly a double-walled vessel which mainly consists inner vessel, outer vessel, and inner support. The Inner support is the main part designing of the cryogenic vessel for thermal and structural criteria. Inner support material for cryogenic vessels can be made of various materials depending on Net evaporation rate (NER) cri...

`(CCL) is not only vital for maintaining the quality and safety of fresh agro-products but also reducing losses – and also provides important support to help increase revenue and thereby promotes the revitalization of rural industry in India. In recent years, numerous studies have focused on improving the efficiency and sustainability of CCL, and t...

Desiccant-based dehumidification and air conditioning systems are considered as an energy efficient alternative to traditional vapour compression based air-conditioning systems for green building cooling technology – especially in tropical hot and humid ambient climates. It is a novel green cooling technology that makes use of low-grade heat for bu...

The use of a desiccant cooling system in modern building consists of a rotary dehumidifier (desiccant wheel) in which air is dehumidified. The resulting dry air is somewhat cooled in a sensible heat exchanger (rotary regenerator), and then further cooled by an evaporative cooler.

The world is transforming quickly especially in field of education, with it, the requirement for universal access to top-notch higher and advanced education. The present shift toward higher quality improvement is the most effective way of developing and maximizing our country's vast talent pool of young. The new National Education Policy 2020 is be...

Proper system sizing: Correctly sizing HVAC systems is crucial to ensure optimal dehumidification. Oversized systems may lead to inadequate dehumidification, while undersized systems can struggle to maintain desired moisture levels. Conducting a thorough analysis of the facility's moisture load and considering factors such as ventilation rates, hea...

Desiccant assisted hybrid cooling systems operate on the principle of adsorption dehumidification and sensible cooling. Such systems use a natural working fluid and can be driven by low-grade thermal energy, which makes them especially useful for integration with renewable or waste heat recovery systems. Because of these merits, desiccant powered h...

Air conditioning system plays a vital role in providing thermal comfort for human. Silica gel, zeolite, and molecular sieve as solid desiccants were generally used as dehumidifier in hybrid cooling due to their adsorption ability to identify the suitable desiccant material for dehumidification for air conditioner. It was noted that silica gel adsor...

The positive displacement twin-screw compressor is used to compress gases to modest pressures. Internal leakage is a fundamental issue with screw compressors. The design and performance are impacted by the phenomenon of leakages across various clearances. The experimental processes are costly and time-consuming to manufacture screw compressor. The...

Poor Indoor Air Quality (IAQ) has a negative effect on human productivity, workers’ health and morale. Direct evidence established stated that characteristics of buildings and indoor environments can directly affect workers’ health and productivity. Building characteristics and indoor environments have been linked to Sick Building Syndrome (SBS) ex...

Traditional cooling systems based on vapor compression are ineffective in humid climates due to their inability to remove moisture below the dew point of the conditioned air, which involves additional effort in the form of an electrical power supply to run vapor compressors. A solid desiccant cooling system reduces power usage while simultaneously...

Nowadays, due to energy crisis and high energy costs, innovative dehumidification technologies, which can possibly make use of renewable energy for sustainable development, need to be explored. Desiccant assisted dehumidification techniques can be used for air conditioning or dehumidification purposes. The same techniques may be applied to gain eco...

When compared to vapour compression based traditional vapour compression systems, the innovative desiccant assisted dehumidification and cooling systems have been shown to be an efficient way to remove moisture from the indoor air with comparatively little energy use in different residential thermal cooling applications. Up until this point, more e...

Building air conditioning significantly affects indoor thermal comfort and, as a result, office occupiers’ productivity. The usage of Phase Change Materials (PCM) based energy efficient cooling systems that will give building occupants satisfying thermal comfort is explained in the current article. Building energy efficiency is increased by using h...

Due to its sustainable cooling design and inexpensive operation, desiccant based dehumidification and cooling systems have been popular in recent years for humid areas. In general, the desiccant cooling used in conjunction with evaporative cooling as two separate types of configurations according to direct or indirect cooling. The relative humidity...

The desiccant dehumidification and cooling is an innovative way to obtain dry air by using desiccants (adsorbents or materials that have a natural affinity for water). A desiccant is able to take up the additional moisture given up by the air without changing its size or shape. So, when moist airstream can pass through a desiccant and become signif...

Rotary twin screw compressor are widely used in the refrigeration, gas processing and energy industries and their application are diverse. Flow rate, pressure, temperature and working fluid are all factors to consider for good screw compressor. Twin-screw compressor are generally simple and small in construction with improved dependability, due to...

A cold chain in the HVAC industry is a temperature controlled supply chain mainly related with refrigerated production, storage and distribution facilities supported by equipment that can constantly maintain the required low-temperature range of perishable products during transportation time frame. However, it is far more complex than it sounds. Fo...

Due to the growing expense of fossil fuels and other environmental issues, it is crucial to reduce the energy cost of built environment cooling systems without sacrificing indoor air quality and comfort levels. One option in this area is solid desiccant dehumidification-assisted cooling systems, which employ alternative energy sources like solar an...

For the concurrent energy researches around the world, the question of energy availability and the effects of global warming have taken on particular importance. This situation creates room for prospective, more modern and sustainable alternative energy sources. In the industrial, automotive and even as a fuel source for power plants, biodiesel can...

The building uses a substantial amount of energy, much of it for air conditioning (AC) systems. Due to its technique of humidity regulation and usage of refrigerants with potential for global warming, conventional air conditioning based on vapour compression refrigeration (VCR) is neither energy efficient nor environmentally benign. VCR is being re...

The different types, applications of thermally activated solid desiccant cooling systems are reviewed in this paper. Particularly when compared to traditional vapour compression systems, solid-desiccant dehumidification has been shown to be a successful approach to remove the moisture from air with comparatively little energy usage. Despite being v...

Traditional cooling systems based on vapor compression are ineffective in humid climates due to their inability to remove moisture below the dew point of the conditioned air, which involves additional effort in the form of an electrical power supply to run vapor compressors. A solid desiccant cooling system reduces powerusage while simultaneously p...

Traditional cooling systems based on vapor compression are ineffective in humid climates due to their inability to remove moisture below the dew point of the conditioned air, which involves additional effort in the form of an electrical power supply to run vapor compressors. A solid desiccant cooling system reduces powerusage while simultaneously p...

As the limited source of Non-renewable energy, it is necessary of conserve the energy till new researches and achievements towards the conservation of our system to Renewable sources. In many parts of India, hot and humid conditions are present, in such an environment, the dry air is essential for domestic and industrial purposes. There is one way...

The cold supply chain has been one of the most emerging HVAC sectors in India. Lot of opportunities are being observed in the cold chain industry in India as large production and distribution of perishable food products are happening across the country. Increasing urbanization and growth of organized retail, food servicing and food processing secto...

The prime objective of the present investigation is to evaluate performance of solid-desiccant vapor-compression hybrid airconditioning system experimentally. The experimental set up is precisely designed and fabricated so as to obtain consistent experimental data. The aim of the experimental study is to measure overall system performance of the sy...

Desiccant-based dehumidification and cooling technology has been in use for many years, primarily in process applications requiring dehumidification and humidity control. In some applications, it may be more energy efficient than traditional defrost or dry cooling systems. A desiccant based dehumidification and cooling system as able to capture and...

An innovative desiccant cooling technology is the alternate suitable option in place of vapour compression based conventional cooling system in building HVAC. It integrates a desiccant based rotary dehumidifier with sensible evaporative coolers in building HVAC.

In the present paper, steady state model of desiccant wheel has been developed. Mass and energy balance equations for air stream and desiccant material are solved by applying mathematical scheme. The model is capable of predicting steady state behaviour of desiccant wheel having process air and regeneration sections. The mathematical model was vali...

The prime objective of the present investigation is to assess the performance evaluation of rotary solid desiccant dehumidifier integrated vapor-compression integrated hybrid thermally cooling system by experimental investigation for the transient humid conditions. The experimental test set up is precisely designed and practically fabricated so as...

This book presents a method for analysis of the structural and thermal behavior of exhaust valve of internal combustion engine. The purpose of the analysis is to study the characteristics of exhaust valve under given thermal load and stresses. The result obtained from analysis is verified. At the design stage it is necessary to predict accurately,...

The logistics supply chain consists of multiple sub-domains of specialty – each of which requires unique equipment and procedures. One of the most complex areas is the cold supply chain. The cold supply chain transports perishables across the globe, ensuring to keep them in a controlled temperature environment to reduce the spread of contamination,...

The Simulations of evaporative cooling powered by desiccant dehumidification systems in hot and humid climate was carried out by using TRNSYS. The moisture level of process air was substantially controlled by the use of the rotary solid desiccant dehumidifier to provide thermal comfort to the indoor space. The simulation results mainly give the out...

The Cylinder block is most important components in IC engine vehicles, which is under very high temperature stresses. To control the engine in efficient way we required to cool the cylinder, extended surface is provided on the cylinder to increase the speed of temperature reducing. By doing thermal analysis on the cylinder block fins, it is helpful...

In this study, a detailed technique is built to examine the effectiveness of a shell and tube heat exchanger (STHE) with 35% baffle cuts (Bc) and variable numbers of baffles. Water was used as the working fluid in CFD simulations of a single pass and single tube heat exchanger. For this simulation investigation, a counterflow approach is used. The...

With data centers enabling nearly all aspects of modern societies and their ever-increasing demand of energy, we need them to be not only cost-efficient but also smart, sustainable and ideally part of the fight against climate change. the article gives glimpse of various emerging data center cooling systems

In this study, the Shell and tube heat exchanger (STHE) was studied with variations in baffle types. Various baffle types and angles allow a wide range of possibilities. Baffles can be configured in a variety of ways to achieve better results at various phases of their use. Many additional improvements can be made to STHXs to improve performance. I...

The use of a novel desiccant assisted dehumidification and cooling system to reduce moisture from the air and to improve indoor air quality is found to be economical, environmentally friendly and readily achievable in the tropics.

The simulative study of desiccant assisted dehumidification and cooling system has been carried out for different climatic conditions of India by use of TRNSYS studio simulation software. The moisture level of process air was substantially lowered by the use of solid desiccant-based rotary dehumidifier to provide conditions air to the indoor space....

It has been observed that utilization of waste heat for the regeneration of desiccant wheel not only achieves great energy saving, but also provides marginal reduction in running cost of the system

An I.C. engine cylinder fins is one of the important automobile components. It is subjected to very high temperature variations and thermal stresses. It is found that by increasing the surface area of fins there is increase in heat dissipation rate. The main aim of this work is to analyze the thermal properties of fins by varying its geometry, fin...

Traditional air conditioning suffer from performance degradation in humid conditions because excess moisture level in ventilation air. The use of desiccant-integrated sensible cooling system can alleviate this problem. In this study, a TRNSYS simulation studio project is developed to perform simulations for different configurations in the summer co...

A desiccant is a hygroscopic substance that induces a state of dryness in its local vicinity in a moderately well sealed container. The Desiccant Cooling System has proven its feasibility and cost saving in the field of air conditioning.

Solid desiccant and Vapour Compression Refrigeration (VCR) integrated hybrid space cooling is an innovative approach – in the field of space cooling applications to overcome environmental and economic issues.

The traditional air conditioners suffer from performance degradation especially in humid conditions. This is due to fact that the excess moisture level in ventilation air considerably increases latent cooling load of the space to be conditioned. The use of desiccant integrated sensible cooling system can alleviate this problem by controlling the te...

Solid desiccant wheel is considered as a promising alternative to reduce humidity ratio of air. In this present work humidity ratio, adsorption rate and desiccant wheel effectiveness was experimentally investigated on silica gel based solid desiccant wheel for hot and humid weather of Vadodara, Gujarat, India. Experimental studies have been analyse...

Chapter 16 - Simulation of solar-powered desiccant-assisted cooling in hot and humid climates Renewable Energy Systems: Modelling, Optimization and Control aims to cross-pollinate recent advances in the study of renewable energy control systems by bringing together diverse scientific breakthroughs on the modeling, control and optimization of renew...

We should not only focus just on the technological changes which are necessary to allow academic publishing to flourish into the future, but on the social, intellectual, technological innovation and institutional changes that are necessary to pave the way for such flourishing. In order for new modes of communication to become broadly accepted withi...

World’s major transportation energy requirement cannot be met alone by use of fossil fuel based petroleum products. So, as a supplement and sustainable energy usage scope and production of bio diesel is highlighted in this article. Bio-diesel can also be the part of renewable biomass sources available freely on this planet. Use of bio diesel can be...

Solar powered drinking water cooler principle is explained in the present article. The system contains solar panels, two low energy fans, water tank fabricated from clay (pottery), thermally sealed box, and pipes. Once these contents are connected together, testing was conducted on water temperatures at both ends. The preliminary results show...

Traditional cooling systems based on vapor compression are ineffective in humid climates due to their inability to remove moisture below the dew point of the conditioned air, which necessitates additional effort in the form of electrical power supply to run vapor compressors. A solid desiccant cooling system reduces power usage while simultaneously...

Friction stir welding is an emerging solid state joining process which is used to join metals and alloys having low weldability. In this research work experimental analysis has been performed on FSW for AA 6061 and MgZ31B A. Effect of FSW parameters like tool rpm, tool transverse speed and tool pin profile are investigated. A vertical milling head...

Friction stir welding is a solid state joining process which is used to join metals and alloys having low weldability .Study about the effect of FSW parameters like tool rpm, tool transverse speed and tool pin profile. A vertical milling head is used to produce FSW joints. In this study, solid state joining technology of friction stir welding (FSW)...

Every year due to lack of proper storage and distribution, India loses a sizable amount of agricultural produce. Thus, proper planning and strategic implementation of linkages among the growers, storage facilities and customers is absolutely essential.

Desiccant assisted HVAC system used mostly in air conditioning of built environment have been considered as an efficient dehumidification and cooling technique of controlling the moisture content present in the supply room wet air. They do not use any ozone-depleting coolants and consume comparatively less energy as compared with that of the vapour...

The automobile and aviation industries are exhaustively working on weight reduction by replacing steel with aluminium alloy. However, joining the aluminium alloy body panel is remain a big challenge because of the inherent properties of aluminium. The dynamic behaviour of arc plasma in the pulsed MIG welding process is a multifaceted heat mass tran...

The article recommends effective guidelines for control and management of Indoor Air Quality (IAQ) in hospitals as the complex hospital environment requires special attention to ensure healthful IAQ to protect patients and healthcare workers against hospital-acquired infections and occupational diseases.

Clean, hygienic fresh ventilated air is the prime requirement for good indoor air quality within different residential applications. Maintaining indoor humidity is an important aspect of maintenance of indoor thermal comfort environment in various residential HVAC applications. The article emphasizes on various means for controlling the indoor humi...

MEP coordination provides a major opportunity to structure and integrate the knowledge related to multiple project phases into a format that allows users to improve project and building performance.

In the present study, an artificial neural network (ANN) model for a solid desiccant-vapor compression hybrid air-conditioning system is developed to predict the cooling capacity, power input and coefficient of performance (COP) of the system. This paper also describes the experimental test set up for collecting the required experimental test data....

In the present study, artificial neural network (ANN) model for a solid desiccant-vapor compression hybrid airconditioning system is developed to predict the cooling capacity, power input and coefficient of performance (COP) of the system. This paper also describes the experimental test set up for collecting the required experimental test data. The...

A performance assessment was carried out for solar-integrated hybrid solid desiccant and dehumidification-powered thermally cooling systems by use of TRNSYS. Desiccant dehumidification-integrated hybrid air conditioning system consists of a rotary solid desiccant wheel to carry out dehumidification. Freely available renewable solar energy is used t...

Both commercial and residential buildings require different types of heating, ventilating, and air conditioning (HVAC) systems based on climate, occupancy, and orientation. In addition, HVAC systems for these buildings should be designed to maintain an optimal indoor thermal comfort with minimum energy consumption, and at the same time, care should...

International conference on thermal engineering and management advances ICTEMA-2020 at Jalpaiguri Government engineering college, India.

HVAC systems can easily catch fire. Therefore to avoid spontaneous fire damage and injury, it is important to be aware of sources of HVAC fire hazards. Though the chances of a fire may be less, the factors have been identified that pose a fire hazard and should be monitored or controlled to ensure safety. The author in this article highlights some...

This article outlines the various means in which cold chain products can be transported, including refrigerated trucks and railcars, refrigerated cargo ships, reefers and air cargo.

One of the major incentives for expanding the production and use of bio-fuels worldwide is the potential environmental benefit that can be obtained from replacing petroleum fuels with fuels derived from renewable biomass resources. The use of vegetable oil in diesel engines is one of the available alternatives, but its use in existing vehicles usua...