Design, Development and Performance Evaluation of an on-Farm Evaporative Cooler
Rajendra Kenghe,
Nilesh Fule,
Kalyani Kenghe
Issue:
Volume 3, Issue 2-2, April 2015
Pages:
1-5
Received:
19 September 2014
Accepted:
12 January 2015
Published:
27 February 2015
DOI:
10.11648/j.ijsts.s.2015030202.11
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Abstract: The portable evaporative cooler was designed for storage of 50 kg fresh fruits having overall diamentions of 1220 x 860 x 787 to study the performance of an on-farm evaporative cooler with the effect of different filling materials viz., coconut coir, saw dust + gunny bag, ECC cool pad, wala sheet and gunny bag. Selection of filling material was based on the cost, water holding capacity, rate of evaporation of water from filled material and easy availability. Sapota (Cv. Kalipatti) fruits were stored in an on-farm evaporative cooler for 16 days. The effect of filling materials on Physiological weight loss (PLW), inside temperature, inside relative humidity and cooling efficiency of five filling materials were studied. The weight loss varied between 2.50 to 13.29, 14.96, 15.37, 15.36 and 15.20% in coconut coir, saw dust + gunny bag, ECC cool pad, walasheet and gunny bag, respectively. The mechanical test such as cooling efficiency for each filling material was determined and it was recorded as 90%, 54%, 38%, 70% and 79% for coconut coir, saw dust + gunny bag, ECC cool pad, walasheet and gunny bag respectively. Minimum inside temperature of 16.5 to 17.20C and maximum inside relative humidity of 97 to 90% was recorded in coconut coir of an on-farm evaporative cooler when ambient temperature was 27.660C and ambient relative humidity was 51%.The maximum storage life of 16 days was found in coconut coir. Coconut coir was performed better when compared with other filling material. It was most economical filing material over the other filling materials.
Abstract: The portable evaporative cooler was designed for storage of 50 kg fresh fruits having overall diamentions of 1220 x 860 x 787 to study the performance of an on-farm evaporative cooler with the effect of different filling materials viz., coconut coir, saw dust + gunny bag, ECC cool pad, wala sheet and gunny bag. Selection of filling material was bas...
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Value Stream Mapping in Glide Manufacturing: A Case Study of Insti-Tools in Zimbabwe
Maxwell Dzanya,
Caroline Mukada
Issue:
Volume 3, Issue 2-2, April 2015
Pages:
6-10
Received:
13 October 2014
Accepted:
10 January 2015
Published:
27 February 2015
DOI:
10.11648/j.ijsts.s.2015030202.12
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Abstract: Value Stream Mapping (VSM) is a tool for Lean Manufacturing which is used in mapping and identifying of all the specific actions required to eliminate the non-value activities manufacturing processes. Glides are essentially plastic components manufactured for supporting beds and sofas (legs). Due to globalisation and rapid advances in manufacturing technology, Small to Medium Enterprises (SMEs) involved in the manufacturing of Glides also need to move with the times and be able to adapt to new situations and VSM is the tool for that. This paper seeks to address the application of Value Stream Mapping to the production line for Glides with the aim of eliminating wastes and improving quality in the production of Glides. The current state map (CSM) was designed, analysed and suggestions were then given to improve the operational process while the future state map (FSM) was drawn for lean implementation.
Abstract: Value Stream Mapping (VSM) is a tool for Lean Manufacturing which is used in mapping and identifying of all the specific actions required to eliminate the non-value activities manufacturing processes. Glides are essentially plastic components manufactured for supporting beds and sofas (legs). Due to globalisation and rapid advances in manufacturing...
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An Economically Sustainable Urban Public Transport Framework: System Dynamics Modelling Approach to Reduce Public Transport Liberalisation Impact in Harare City
Portia Mupfumira,
Budisantoso Wirjodirdjo
Issue:
Volume 3, Issue 2-2, April 2015
Pages:
11-21
Received:
20 February 2015
Accepted:
11 March 2015
Published:
28 July 2015
DOI:
10.11648/j.ijsts.s.2015030202.13
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Views:
Abstract: Public transportation plays a key role to socio-economic development of any nation. This service enhances people’s livelihood framework by facilitating mobility and accessibility to services. Moreover, there is clear global evidence that a well performing public transport is an important enabler of sustained economic prosperity. Rapid urbanization in developing countries has resulted in transport facilities and infrastructure failing to cope with demand resulting in congestion, movement delays, high travel costs, and construction of holding bays in order to decongest the city, which will contribute to an increased usage of non-renewable energy. This prompts implementation of non-comprehensive strategies such as partial deregulation of transportation systems that caused further deterioration in economic sustainability. An economically sustainable transport system advocates for mobility, resource, and operational efficiency. This research focuses on developing a bus investment conceptual framework of a public transport system that improves mobility, resource, and operational efficiency to aid in sustaining of public transportation system for an unforeseeable future. With this in mind, a Harare bus investment system has been modelled as a policy framework model to evaluate its economic sustainability. This will help develop a long-term economically sustainable public transportation and reduce the overall impact of the earlier liberalisation of the transportation sector
Abstract: Public transportation plays a key role to socio-economic development of any nation. This service enhances people’s livelihood framework by facilitating mobility and accessibility to services. Moreover, there is clear global evidence that a well performing public transport is an important enabler of sustained economic prosperity. Rapid urbanization ...
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