*7.1.1 Compressor cost*

For compressors, the price depends on the type of compressor, the power, and the volume swept, while for motor compressors the price is given according to the type, the power, and flow of the heat transfer fluid at the condenser.

Compressor cost = f (type, power, volume swept).

Motor compressor cost = f (type, power, flow rate of the coolant at the condenser).

So for each model corresponding to a certain type of compressor, a function of the following form is established:

Compressor cost = a. (Power)<sup>b</sup> . (Volume swept)<sup>c</sup>

Determine the coefficients a, b, and c.

We are able to express by an analytical approach the price of a certain type of compressor, knowing the technical characteristics.

Generally correlations have been developed to determine the investment costs of each organ.

For the compressor, the correlations used are [37]:

$$\mathfrak{c}\mathfrak{c}\_{\square^{\mathsf{P}}} = \mathfrak{g}.\mathfrak{z}\mathfrak{r}.\mathfrak{l}\mathfrak{o}^{\mathsf{s}} \quad \mathfrak{c}\mathfrak{y}^{\langle\mathsf{w},\mathsf{u}\rangle} \quad \bar{\mathfrak{Q}}\_{\mathbb{E}\mathcal{V}}^{\mathfrak{T}} \stackrel{\mathsf{y}^{\mathcal{T}}}{\le} \bar{\mathfrak{w}}^{\mathcal{T}}$$

with

10.3 < cyl < 30.6 [cm<sup>3</sup> ] 835 < *QEV* < 2650 [W] 475 < W < 1225 [W]

## *7.1.2 Evaporator cost*

For evaporators the price depends on the type of evaporator, the power, the exchange surface, the flow of the heat transfer fluid at the evaporator, the number of fans, and the pitch of the fins.

Evaporator price = function (type, power, surface, flow, no. of fans, no fins). For the evaporator, the correlations used are [37]:

$$c i\_{\\_EV} = 2.94 \quad \dot{Q}\_{EV}^{0.44} \; D\_{EV}^{0.42}$$

with

850 < QEV < 5500 [W] 685 < DEV < 3325 [m<sup>3</sup> /h]

#### *7.1.3 Condenser cost*

The price of a condenser is given according to the type of condenser, the power, the exchange surface, the flow of heat transfer fluid, and the number of fans.

Price = function (type, power, surface area, heat transfer fluid flow, no. of fans). For the condenser, the correlations used are [37]:

*Performance Analysis of a New Combined Organic Rankine Cycle and Vapor Compression… DOI: http://dx.doi.org/10.5772/intechopen.91871*

$$\text{ci}\\_\text{c}\_{\text{CD}} = \text{2.4} \cdot \text{I} \text{o}^s \cdot \text{@}\overleftarrow{\text{c}}\_{\text{CD}}^{0.53} \text{ } \text{D}\_{\text{CD}}^{1.96}$$

with 3500 < QCD < 20,000 [W] 0.6 < DCD < 2 [m3 /h]
