# P. K. Das

## Publications

##### 3 Thermodynamic Analysis of GT Cycle with Naphtha or Natural Gas as the Fuel: A Thermodynamic Comparison

**Authors:**
S. Arpit,
P. K. Das,
S. K. Dash

**Abstract:**

In this paper, a comparative study is done between two fuels, naphtha and natural gas (NG), for a gas turbine (GT) plant of 32.5 MW with the same thermodynamic configuration. From the energy analysis, it is confirmed that the turbine inlet temperature (TIT) of the gas turbine in the case of natural gas is higher as compared to naphtha, and hence the isentropic efficiency of the turbine is better. The result from the exergy analysis also confirms that due to high turbine inlet temperature in the case of natural gas, exergy destruction in combustion chamber is less. But comparing two fuels for overall analysis, naphtha has higher energy and exergetic efficiency as compared to natural gas.

**Keywords:**
Natural Gas,
Exergy,
Gas Turbine,
naphtha

##### 2 Induced Acyclic Graphoidal Covers in a Graph

**Authors:**
K. Ratan Singh,
P. K. Das

**Abstract:**

**Keywords:**
Graphoidal cover,
Induced acyclic graphoidal cover,
Induced acyclic graphoidal covering number

##### 1 Induced Graphoidal Covers in a Graph

**Authors:**
K. Ratan Singh,
P. K. Das

**Abstract:**

An induced graphoidal cover of a graph G is a collection ψ of (not necessarily open) paths in G such that every path in ψ has at least two vertices, every vertex of G is an internal vertex of at most one path in ψ, every edge of G is in exactly one path in ψ and every member of ψ is an induced cycle or an induced path. The minimum cardinality of an induced graphoidal cover of G is called the induced graphoidal covering number of G and is denoted by ηi(G) or ηi. Here we find induced graphoidal cover for some classes of graphs.

**Keywords:**
Graphoidal cover,
Induced graphoidal cover,
Induced graphoidal covering number

## Abstracts

##### 1 Thermodynamic Analysis of GT Cycle with Naphtha or Natural Gas as the Fuel: A Thermodynamic Comparison

**Authors:**
S. Arpit,
P. K. Das,
S. K. Dash

**Abstract:**

**Keywords:**
Natural Gas,
Exergy analysis,
Gas Turbine,
naphtha