Design and Development of Thermal Manikin for Cool & Warm Vests (Record no. 14739)

MARC details
000 -LEADER
fixed length control field 03558nam a22001697a 4500
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number 620.1
Item number K963D
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name Kumar, Chanchal
245 ## - TITLE STATEMENT
Title Design and Development of Thermal Manikin for Cool & Warm Vests
Statement of responsibility, etc by Chanchal Kumar
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication IIT Jodhpur
Name of publisher Department of Mechanical Engineering
Year of publication 2019
300 ## - PHYSICAL DESCRIPTION
Number of Pages xvi,68p.
Other physical details HB
520 ## - SUMMARY, ETC.
Summary, etc The core temperature of a healthy human body is around 370C. This can vary within a band of ±10C during the day depending upon physical activity level, emotional state, and climatic conditions. The extreme cold and hot climate can change core body temperatures beyond this band. The variation in body temperature not only reduces work efficiency but can also result in life-threatening heat-related injuries. The PCM based cool & warm vests can provide thermal comfort to persons working in these harsh conditions.A thermal manikin has been developed at IITJ for testing of PCM cool & warm vests under controlled thermal conditions in the climatic chamber. The Basal Metabolic Rate (BMR) can be expressed in the form of equivalent body surface heat flux or Metabolic Equivalent of Task (MET) for different activities. The present design of thermal manikin employs a copper torso with an IR heater as a heating element at the core. The heat generated on the heater is transferred to the torso surface through radiative and convective heat transfer. The surface heat flux will be measured using a handheld heat flux sensor and any deviation from the required heat flux will be controlled by controlling power dissipated to the heater. Uniform distribution of surface heat flux and temperature is one of the key requirements to be met by the manikin. Therefore, heat transfer analysis has been carried out using ANSYS Fluent to get a distribution of the same for different activities.The results of the analysis agree with the standard body parameters.The thermal manikin has been realized and the results are validated by experimentingthe manikin. Further, the thermal performance analysis has been carried out for PCM cool & warm vests using AnsysFluent. The analysis on cool vest has been carried out using AnsysFluent default energy equation with solidification/melting model and also using a separate UDS (User Defined Scalar) written in C++ language for solving “transport equation”. The analysis results for both cases are compared. The analysis was also carried out for four different PCMs namely ice,paraffin C-16, 1-dodecanol, and savE OM 21. The effect of activity level on the thermal performance of cool vest has also been studied. The analysis of warm vest has also been carried outusing Ansys Fluent for sub-zero ambient conditions.Further, the modeling of dendrite solidification in an under-cooled aqueous solution of sodium acetate trihydrate has been carried out. The enthalpy method has been used to compute the solid-liquid interface growing in undercooled melt. The interface temperature and grain growth have been modeled considering the curvature effect and solute undercooling. A 2-D computational grid of square control volumes has been used, and discretized governing equations were solved explicitly. The crystal anisotropy was imposed explicitly. Key Words: PCM vest, thermal manikin, solidification modeling, sodium acetate trihydrate, vest thermal analysis<br/>
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term Thermal Manikin for Cool & Warm Vests
Topical Term MTech Theses
Topical Term Department of Mechanical Engineering
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name Chakraborty, Prodyut Ranjan
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Thesis
Holdings
Withdrawn status Lost status Damaged status Not for loan Collection code Permanent Location Current Location Shelving location Date acquired Full call number Accession Number Price effective from Koha item type
      Not For Loan Reference S. R. Ranganathan Learning Hub S. R. Ranganathan Learning Hub Course Reserve 2024-01-30 620.1 K963D TM00156 2024-01-30 Thesis