NOPR Collection:

Performance of forced and wind assisted domestic solar hot water systems- a comparative experimental study

2008-08-25T07:31:54Z

Title: Performance of forced and wind assisted domestic solar hot water systems- a comparative experimental study Authors: Tamilarasan, K; Perumal, K; Srinivasan, P S S Abstract: Natural circulation type hot water systems are widely used in domestic applications due to cost effectiveness; however, efficiencies are lower due to lower collector flow rate under natural circulation. Forced circulation systems (FCS) offer higher efficiencies but require electricity for operation. A novel system, windmill assisted system (WAS), is fabricated and tested. Collector flow rates in WAS are observed as a function of wind velocity. Wind flow increases flow rate and thus heat collection. On test days, efficiencies of WAS and FCS modes are found close to each other. WAS appears to be a better alternative to FCS for remote areas with no electricity. Page(s): 717-723

Structure and performance of industries in Gujarat

2008-08-25T07:31:49Z

Title: Structure and performance of industries in Gujarat Authors: Malhotra, Gunjan Abstract: Present study analyses economic performance and industrial growth pattern of Gujarat state, India. Two digit industries (TDI), which are major contributors to the economy, offer wide scope for employments due to maturity in technical skills and capabilities of entrepreneurs, investment potentials and net value addition. Economic reforms policies improved growth pattern of TDI. Manufacturing units of electricity, rubber, plastic, petroleum products recorded a significant growth (55%). TDI has diversified into chemicals, engineering, pharmaceuticals, dyes and dye intermediates, food processing, agro based industries, dairy, edible oils vegetable oils, soda ash, cement, fertilizers, petrochemicals, paper products from its traditional textile base. Ports and related offshore infrastructure development of service sectors enhanced productivity rate by strengthening supply chain networks of transportation. Page(s): 708-716

Performance evaluation and rating of bridges under uncertain structural parameters using integrated load test

2008-08-25T07:31:51Z

Title: Performance evaluation and rating of bridges under uncertain structural parameters using integrated load test Authors: Sahu, G K; Garg, R K; Kumar, Ram Abstract: An integrated load-test technique has been developed to test load carrying capacity of bridges. The technique has been illustrated with a case study implemented on one of the bridges at NH 24 near Hapur. This methodology can also be used for performance evaluation, developing load ratings and for detecting possible degradation or damage in bridges. Page(s): 703-707

Computation of flow in a target flowmeter

2008-08-25T07:31:52Z

Title: Computation of flow in a target flowmeter Authors: Temel, Ümit N; Öztürk, Adnan; Pinarbasi, Ali Abstract: Present study determines optimum geometry for target fluidic flowmeter capable to function at small Reynolds numbers (<300). Using fluent code solver, numerical studies were carried out for gasoil measurements at various geometries and Reynolds numbers. Computational technique for unsteady incompressible viscous flow applicable to two dimensional flow geometries is presented. Effects of nozzle exit-target distance (Xt) and target width (Wt) were studied to determine optimum geometry. Flow characteristics and oscillation mechanism were investigated for a flowmeter. Page(s): 697-702