Ashok Jhunjhunwala

01-01-2018, Narayanamurthy, Sriram, Ganesan, Pradheep, Jhunjhunwala, Ashok, Kaur, Prabhjot

A desert cooler typically is a blower fan that sucks air through a moistened surface to achieve a drop in inlet air temperature. A pump is used to circulate water from a lower tank to the evaporative pads working with a swing louver motor for directing the air automatically. The power consumption of the evaporative air cooler is primarily in single phase induction motor (SPIM) used for fan motor [1, 2]. To lower this power consumption, a brushless DC machine and its circuitry were designed and used. This is powered also by PV panel and batteries. The power consumption comparative study was carried out on SPIM and BLDC machines at three speeds. The outcome of the study shows 39.3% of power saved on with BLDC machine air coolers.

01-01-2020, Ginley, David, Ager, Joel, Agrawal, Rakesh, Alam, Muhammad A., Arora, Brij Mohan, Avasthi, S., Basak, Durga, Bhargava, Parag, Biswas, Pratim, Bora, Birinchi, Braunecker, Wade A., Buonassisi, Tonio, Dhage, Sanjay, Dhere, Neelkanth, Garner, Sean, Hu, Xianyi, Jhunjhunwala, Ashok, Kabra, Dinesh, Kavaipatti, Balasubramaniam, Kazmerski, Lawrence, Kottantharayil, Anil, Kumar, Rajesh, Lo, Cynthia, Mani, Monto, Nair, Pradeep R., Narsamma, Lakshmi, Olson, Dana C., Pal, Amlan J., Raghavan, Srinivasan, Ramamurthy, Praveen, Sarada, Bulusu, Sarkar, Shaibal, Sastry, O. S., Sridhar, Harshid, Tamizmani, Govisami, Urban, Jeffrey, van Hest, Maikel, Vasi, Juzer, Wang, Yanping, Wu, Yue

This chapter covers the largest set of projects in SERIIUS that can be viewed overall as having three distinct themes. First is the development of new low-capital thin-film photovoltaic (PV) technologies by high-throughput manufacturing processes with a focus on solution-based roll-to-roll processing. This effort was highly integrated with the development of thin glass substrates and packaging from Corning, and focused on absorbers made from CuInGaSe2, CuZnSnSeS, organic molecules such as fluorinated polymers, perovskite solar cells based on methyl ammonium lead iodide (MAPbI), and silicon. Significant progress, including world-record devices, was achieved in a number of areas, and substantial improvements in lifetime were attained. Second is an assessment of the stability and failure mechanisms of PV in hot/dry and hot/wet climates. This work included assessing PV module stability across the seven climate zones of India and in the United States. The importance of dust and particulates was assessed. New failure mechanisms were identified, in particular to the hot/dry and hot/wet climates, and an international working group was convened. Coupled to developing new PV technology and understanding degradation pathways, an effort was made in multiscale modeling – from atoms to modules – to begin to connect the basic science to the ultimate deployability of the PV devices and modules. Here, the potential importance of bifacial modules was assessed.

03-12-2007, Malhotra, Saloni, Rathi, P., Gonsalves, Timothy A., Ashok Jhunjhunwala, Giri, Thejus

DesiCrew is a unique Business Process Outsourcing (BPO) initiative that provides high volume data related services at an affordable cost from rural areas across India. The model provides cost cutting alternatives to urban clients and new sources of income and employment to the villagers, by leveraging Internet technology. The DesiCrew central team in Chennai manages training of rural workforce, distribution and monitoring of work, quality control and client interaction all remotely. In this paper, we describe the Rural BPO model and one specific application, data entry of forms. We describe the software, Pegasus, developed for this purpose and explain the management of the distributed workforce. © 2007 International Federation for Information Processing.